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2024-08-13 Application Narrative
Proposed Business/Professional Office and Personal Services Building within the Cor in the Corridor Development District I at 189 Willow Street in the Town of North Andover, Massachusetts Application for Permits 7iled Under Me Town of'North .Andover Zoning By-Laws Chapter 195,Arlicle 8, Part 3 — Site Plan Review and Chapter 195, Article 10, §195-10� 7, Special Perinits Prepared for: Vincent J. Grasso 30 Faulkner Road North Andover, Massachusetts 01845 Respectfully Submitted To: The Town of North Andover Planning Board 120 Main Street North Andover, Massachusetts 01845 Prepared By: Hayes Erig4ieeriirig, kic, 603 Sa ern Street Wakefield, Massachusetts 01880 p. 781,246,2800 f '781,246.7S96 www.ha yeserq.a>rn This page intentionally left blank Proposed Office and Services Building North Andover, Massachusetts Application for Special Permit and Site Plan Review Table of Contents 1. Transmittal Letter dated November 8, 2023 2. Planning Board Special Permit/ Site Plan Review Applications 3. Project Impact Statement I. Introduction and Background.......................................................................................2 II. Development Description...............................................................................................3 III. Compliance with §195-8.15 — Site Plan Review Design Guidelines...........................4 IV. Compliance with §195-10.7— Special Permits............................................................6 V. Waiver Requests ...........................................................................................................7 VI. Traffic Impacts...............................................................................................................7 VII. Fiscal and Community Impacts....................................................................................8 List of Appendices Appendix A—Locus Deed Appendix B—Notice of Intent— 189 Willow Street 1 This page intentionally left blank 603 Salem Street Nantucket, [WAO2b54 VVakefe|d. MAO188O Te|� (508) 228-7909 - Tel: (781) 246-2800 7ayHayesEngmeennQ. |no Fax: (781) 24O-75A8 | Refer to File No. NOA-0087 November U' 2D23 Town nf North Andover Planning Board 120 K8@iO Street North Andover, K8AO1O45 RE: Site P|8O and Special Permit Application 189 Willow Street DELIVERY BY HAND Dear Ms. Enright: Enclosed for filing with the Planning Board are the fO||OvviOg in eight (8) copies with regard to the above referenced matter: ° Application for Site P|8D and 8p8Ci8| Permit w /2\ fUU-SiZ8 Site P|8O for Special Permit w (3) reduced-size Site P|RO for Special Permit 0 Certified Abutters List * Filing Fee and Peer Review Checks w Notice Of Intent Application * Thumb drive with e|e[tnOOiC SUbDliGSiOO Please file the Application in your ordinary course for placement OOthe next applicable P|@OOiOg Board agenda. Please dO not hesitate tO contact 08 with any questions O[ comments. Regard8, Hayes Engineering, Inc. do_O�?'X Eric B. Lane, PE Project Engineer EOC|OSUnBG This page intentionally left blank PLANNING DEPARTMENT Community& Economic Development Division Special Permit— Site Plan Review Application Please type or print clearly. 1. Petitioner: Vincent J. Grasso Petitioner's Address: 30 Faulkner Road, North Andover, MA 01845 Telephone number: 978.502.7506 2. Owners of the Land: Same as Petitioner Address: Number of years of ownership: 1-year see ENRD 17600/154, 10/20/22) 3.Year lot was created: 2002 (see ENRD PL 14283) 4. Description of Proposed Project: Construction of a multi-tennant professional/business office and personal service building within a 6,777-s£ single story building with 20 parking spaces inclusive of one ADA van accessible space) associated driveway, utilities, and stormwater management a1212urtenances. 5. Description of Premises: 3.34-acre wooded parcel on northerly side of Willow Street 6.Address of Property Being Affected: 189 Willow Street Zoning District: Corridor Development District 1 (CDD1) Assessors Map: 25 Lot#: 167 Registry of Deeds: Book#: 17600 Page M 154 7. Existing Lot: (undeveloped) Lot Area(Sq. Ft): 145,508 sf. Building Height: N/A Street Frontage: 417.79 If. Side Setbacks: N/A Front Setback: N/A Rear Setback: N/A Floor Area Ratio: N/A Lot Coverage: 0% 8. Proposed Lot(if applicable): Lot Area(Sq. Ft): Building Height: Street Frontage: Side Setbacks: Front Setback: Rear Setback: Floor Area Ratio: Lot Coverage: Page 3 of 4 120 Main Street, Planning Dept., North Andover, Massachusetts 01845 Phone 978.688.9535 Fax 978.688.9542 Web www.northandoverma.gov S. Required Lot(as required bx Zoning Bxlaw): Lot Area(Sq. PA Building Height: Street Frontage: | Side Setbacks: Front Setback: Rear Setback: 2 Floor Area Ratio: Lot : 2 10. Existing Building (if applicable):Not Applicable Ground Floor(So. Ft]: #ofFloors: Total Sq. Ft.: Height: Use: Type ofConstruction: 11. Proposed Building: Ground Floor(So. Ft]: 6,667 sf. #ofFloors: I-story Total So. Ft 6,667 sf. Height: Use: Type ofConstruction: 13L Has there been o previous application for o Special Permit from the Planning Board on these premises? If so,when and for what type ofconstruction? office/business and 2O22Withdrawn 13.Section of Zoning Bylaw that Special Permit|nBeing Requested Section parking spaces 14. Petitioner and Landowner aigneture/a\: Every application for 8 Special Permit 8h8|| be made On this form, which is the 0fhCi8| form of the Planning Board. Every application shall hH filed with the Town Clerk's office. |t shall hH the responsibility 0f the petitioner h}furnish all supporting documentation with this application. The dated copy of this application received by the Town Clerk or Planning Office does not 8b8O|v8 the applicant from this responsibility. The petitioner 8h8U be responsible for all Hxp8n8H8 for filing and |8g8| notification. Failure to comply with 8pp|iC8UOn requirements, 88 Cited herein and in the Planning Board Rules and Regulations |f i di issal by the Planning Board of this |i d incomplete. Petitioner's Signature: Print or type name here:4Vincn /. Grasso Owner's Signature: Print or type name here: Vinc nt/Gi so 15. Please list title of plans and documents you will be attaching tothis application. Site Plan - 189 Willow Street prepared by Hayes Engineering, Inc. Building Elevation Page 4Of4 120 Main Street, Planning DHDt., North Andover, Massachusetts 01845 PhOneg78.688.9535 F3xg78.G88.g542 Web PLANNING DEPARTMENT Building Conservation Health Planning Stevens Estate Zoning Certification of Payment of MunicipalTaxes, Fees, Assessments, Betterments and Other Municipal Charges The Town of North Andover General Bylaw Chapter 129-1, provides that any application for a permit or license may be denied, suspended or revoked if the holder thereof has failed or refused to pay any taxes, fees, assessments, betterments or other municipal charges. By signing this application, the applicant represents that he or she has paid all such taxes and fees. Vincent J. Grasso , certify under the penalties of perjury that to the best of my knowledge and belief, I have not neglected or refused to pay any municipal taxes, fees, assessments, betterments or any other municipal charge including amounts assessed under the provisions of section twenty-one D, or am not applying for a license or permit with respect to any activity, event or other matter which is the subject of such license or permit and which activity, event or matter is carried out or exercised or is to be carried out or exercised on or about real estate whose owner has neglected or refused to pay any local taxes, fees, assessments, betterments or any other municipal charge. Signed under oath: N me 3 lkner Road,North Andover, MA Address Does the Property Owner own any additional property in North Andover (Yes or No)? (Y/N). If yes, please list the property address of any additional property. Property Address: North Andover Tax Collector Signature Name Date • I t { i Town of North Andover Planning Department Community&Economic Development Division ' 120 Main Street North Andover,Massachusetts 01845 Town of North Andover Planning Board Application for Special Permit Please type or print clearly. 1.Petitioner: _ Vincent J. Grasso Petitioner's Address: 30 Faulkner_Ro.ad.,_N.orftAndover; MA (11$45 Telephone number: 978-502.7506 ------__ 2.Owners of the Land: Same as Address: Number of years of ownership: _1 (See ENRD 17600/154) 3.Year lot was created: 2002 (See_ENRD Plan 14283) 4.Description of Proposed Project: --Cons ruction of a 6,667st. multi-tenant pro essiona usiness office bui ing with spa�ces- ot sur ace parking me usive oT1 AZ5 van accessible space , associated driveways, utilities and stormwater appurtenances. 5.Description of Premises: 3.34 acre wooded parcel on n iaherly-si e....of Willow Street, south of 114 6.Address of Property Being Affected: 189 Willow Street Zoning District: CDD1 Assessors Map: 25 Lot#: 167 Registry of Deeds:Book#:__1. 67 00 Page#: 154 7,Existing Lot: Lot Area(Sq.Ft): 145,508 sf Building Height: _ Street Frontage:,- 417.79 ft Side Setbacks: No buildings/undeveloped Front Setback: Rear Setback: Floor Area Ratio: Lot Coverage: 8.Proposed Lot(if applicable): No changes to lot lines Lot Area(Sq.Ft): Building Height: Street Frontage: Side Setbacks: Page 1 of 3 120 Main Street,Planning Debt,,North Andover,Massachusetts 01845 Phone 978.688.9535 Fax 978.688.9542 Web www.nortlrandoverma.gov Front Setback:_...._.__....__...._... ..._._-- Rear Setback: _ Floor Area Ratio: __...._._.__.._......._ Lot Coverage: 9.Required Lot(as required by Zoning Bylaw): Lot Area(Sq.Ft):..43 560 sf Building Height:_„35,-feet Street Frontage: 156 ft Side Setbacks:.__J5.::few__ Front Setback:.........._1.Oft.___,__ Rear Setback ---__.20-.feet.....__._..__._ Floor Area Ratio:.. 0.75.:1..----___........ Lot Coverage: 25%n 10. Existing Building(if applicable): Not applicable Ground Floor(Sq.Ft.):__---------------..._. #of Floors: ,._......... _...._.-- Total Sq.Ft.: _. Height:_--------.__...___...__._____...... use: —---------....... Type of Construction: 11.Proposed Building: Ground Floor(Sq.Ft.):-.„6,6,6f_.,...._ #of Floors:.__..._.- 1 Total Sq.Ft.___6,,6E7 sf Height:.._. _34.3._ft___ Use: _Prof,/B:us:Office .......................... Type of Construction: 12.Has there been a previous application for a Special Permit from the Planning Board on these premises? Yes.__ .. _...___... If so,when and for what type of construction?..2005..Office/Bus. and 2022, withdrawn 1.3.Section of boring Bylaw that Special Permit Is Being Requested 195-16 5(A) uses reguireing a special permit 14. Petitioner and Landowner signature(s): Every application for a Special Permit shall be made on this form,which is the official form of the Planning Hoard.Every application shall � be filed with the"town Clerk's office.It,shall be the responsibility of the petitioner to furnish all supporting documentation with this application.The dated copy of this application received by the Town Clerk or Planning Office does not absolve the applicant from this responsibility.'the petitioner shall be responsible for all expenses far filing and legal notification.Failure to comply with application requirements,as cited herein and*J. ra BoardRules and Regulations may result in a dismissal by the Planning Board of this application as incomplete. Petitioner's Signature: __. ...............Print or type name here: -.__._--------------_.w-.Owner's Signature: Print or type name here: Vi .._......._._ __ _.................... 15.Please list title of plans and documents you will be attaching to this application. Application and Narrative by Hayes es Engineering, Inc. SI)ecial Pen-nit Site Plan by Hayes Erujneerin2- Inc, Foot rint and Building Page 2 of 3 ._..............-----_.___..............._____.._. _--- _.._.__..._........... _ _ 120 Main Street,Planning Dept.,North Andover,Massachusetts 01845 Phone 978.688.9535 Fax 978.688.9542 Web www.northandaverma.gov PLANNING DEPARTMENT Building Conservation Health Planning Stevens Estate Zoning Certification of Payment of Municipal Taxes, Fees, Assessments, Betterments and Other Municipal Charges The Town of North Andover General Bylaw Chapter 129-1, provides that any application for a permit or license may be denied, suspended or revoked if the holder thereof has failed or refused to pay any taxes, fees, assessments, betterments or other municipal charges. By signing this application, the applicant represents that he or she has paid all such taxes and fees. I Vincent J. Grass , certify under the penalties of perjury that to the best of my knowledge and belief, I have not neglected or refused to pay any municipal taxes, fees, assessments, betterments or any other municipal charge including amounts assessed under the provisions of section twenty-one D, or am not applying for a license or permit with respect to any activity, event or other matter which is the subject of such license or permit and which activity, event or matter is carried out or exercised or is to be carried out or exercised on or about real estate whose owner has neglected or refused to pay any local taxes, fees, assessments, betterments or any pther municipal charge. Signed under oath: Tme ner Road, North Andover, MA Address Does the Property Owner own any additional property in North Andover(Yes or No)? (Y/N). If yes, please list the property address of any additional property. Property Address: North Andover Tax Collector Signature Name Date Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover; Massachusetts 3. Project Impact Statement I Introduction and Background Vincent J. Grasso ("the Applicant" and "the Owner")purchased the property at 189 Willow Street in North Andover, Massachusetts ("the Property" or "the Site") in October 2022 (see Appendix A—Locus Deed). The Site consists of approximately 3.3-acres in land area located along the northerly side of Willow Street. The Site is bounded by Willow Street, to the south Turnpike Street to the northeast and vacant land to the northwest. The Site is located within the Corridor Development District 1 zoning district. A portion of the Town of North Andover Zoning Map is provided in Figure 1, below: Legend —r—a RaII Lune Aotivo Rail line(Abandoned) f mpea5y paim,ss 1 l� r r/ r/? v9 �� // sown Bounder � % i l�� /r �r rrr' r �ri I rr Airport Zoning Overlay rfj rr rpJ r r/ I // Adult Entertainment Dlsvric9 Machine Shop vuaga 0ecil.y Disoict r�j/�i/ /rl r�/A W'SlafShed Prc)teclloft Dlslri4i;Wefat Protection District ryry Historic M11 Area {Medical M pane Downtown Overlay D'e61at Kidmis District �if if if Mr / Os}inod Smart Growth(40R)Desd9ct r � Ir l r "Overl;tyVng districts[ahead as underlying relor / ! Local Roads Interstate r r ^^^ Major Roads � p t r Hyd og a pn c Feaf nes f0 r, Zoning Bualneas 1 D,strict Business 2 District �II�II�II�IINIIO Business 3 D at ct r ff p Bu4inesa 4 Dt9th44 , rrf r Crarefai Busress District �ksr, f fi om/ I Planned Cornmerc al Development District �Y CnmVdor Development Dtstnim 1 Corridor Development Dlstrfc2 2 'f r Corridor Development Dlstr et 8 xfl�„ ,O Figure I loning,Map The Site is currently vacant excepting an existing access driveway constructed across the wetlands at the south of the property. This work was performed under permits issued on or about 2005 by a previous owner. Site topography is relatively flat with bordering vegetated wetlands surrounding a portion of uplands that was previously disturbed under the aforementioned previous permits for the site. Portions of this area of disturbance have developed into an isolated vegetated wetland. Any work proposed within 100-feet of these wetlands is under jurisdiction of Massachusetts General Laws (MGL) Chapter 131, Section 40, their regulations at 310 CMR 10.00, and the Town of North 2 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover, Massachusetts Andover Wetlands By-Laws. A Notice of Intent has been filed concurrently with this Application and is included as Appendix B. The Applicant seeks to create professional/business office and personal services building with multiple tenants at the Site. The proposed building is 6,667-sf. in size with 20 spaces of surface parking. The Applicant is seeking, through this Application, the following permits from the Planning Board("the Board") for construction of the 7,776-sf. building, associated parking, driveways, and utilities ("the Project"): 1. Special Permit pursuant to §195-8.13.B; and 2. Site Plan Review pursuant to §195-8.11.A(1) of the North Andover Zoning By-Laws The Applicant will also require approval by the North Andover Conservation Commission for a Notice of Intent application for the Project. The Applicant has filed for this Order of Conditions concurrent with the submission of this Application and will seek concurrent approval as meeting schedules may allow. IT Development Description The Project, as proposed by the Applicant, consists of the construction of an 6,667± sf. (footprint) concrete masonry unit (CMU)building for use as an office/services building. The proposed building will be located central to the site with much of the property vegetation remaining to provide ample screening of the facility. Zoning Compliance is summarized in Table 1, below: Table 1—Zoning Summary Dimensional Control Required/Allowed Proposed Front Yard Setback 10 feet 86.2 feet Side Yard Setback 15 feet 168.6 feet Rear Yard Setback 35 feet 83.2 feet Minimum Frontage 150 feet 417.79 feet Minimum Lot Area 43,560 sf. 145,505 sf. Maximum Building Height 35 feet 34.3 feet Floor Area Ratio 0.75:1 0.05:1 Lot Coverage 70% 11.9% The Project will continue to utilize the existing site driveway access along Willow Street. Parking for the project will be interior to the parcel and located to the southeast of the building. Parking compliance for the proposed use is summarized below: 3 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover, Massachusetts Required Parking Ratio, Business Other: 3.0 spaces per 1,000 sf. 6,667 sf. x 3.0 spaces per 1,000 sf. 20 spaces required Parking Provided: 20 spaces inclusive of 1 HP van space Domestic and fire suppression water supply will connect to the existing infrastructure in Willow Street through the site driveway with the water main to the proposed building. One (1) new fire hydrant is proposed proximate to the Fire Department Connection (FDC) at the buildings. Final locations are to be approved by the North Andover Fire Department. Sanitary sewer service for the Project will be pumped via force main to the existing sewer in Willow Street. Electric, telephone and cable television services will connect to Willow Street and run underground into the Site. Stormwater runoff from proposed pavement areas will be collected by drainage system consisting of a sediment forebay, water quality swale, and extended detention basin designed to conform with the requirements of the Massachusetts Stormwater Handbook. The system provides a minimum presumptive TSS removal rate of 85%, approximation of the annual recharge to groundwater, and mitigation of peak flow rates from the project. A comprehensive Stormwater Management Report for the Project is provided within the Notice of Intent which accompanies this report as Appendix B. III. Compliance with§195-8.15—Site Plan Review Design Guidelines In accordance with §195-8.15 of the Town of North Andover Zoning By-Law, the Planning Board shall consider the following criteria in making its decision. The Applicant has summarized the criteria and the Project's compliance with same below: A. General (1) The Project has been designed in accordance with the dimensional and use requirements of the Zoning Bylaw. Please refer to Table 1 above. (2) The Project is screened from abutters providing, at a minimum, approximately two- times the required setback in all directions. B. Environmental (1) The Project site does not have any unique or important natural, historic, or scenic features. However, it has been designed to preserve the streetscape to the maximum extent possible and to protect adjacent resource areas. (2) The Project proposes an on-site dumpster for refuse collection. The Applicant will contract with a private refuse hauler for disposal. 4 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover; Massachusetts (3) Based on Title V estimates the Project is anticipated to generate approximately 585 gallons per day(GPD) of sanitary sewage. Daily domestic water demand is also estimated at 585 GPD with an anticipated required peak flow of 6 gallons per minute (GPM). (4) The Project has been designed in accordance with the Massachusetts Stormwater Standards. A stormwater checklist and detailed stormwater management report are included in the Notice of Intent application, accompanying this report as Appendix B. (5) The Applicant has provided a landscaping plan as Sheet C5 of the accompanying site plan. Selected plantings are native plantings designed to enhance the habitat and buffer zone function(s) of the Site. (6) The Applicant has provided and Erosion and Sedimentation Control Plan as Sheet C3 of the accompanying site plan. There are no steep slopes at the Site. (7) The Applicant has provided nearly double the required setback to adjacent property boundaries and will retain much of the existing vegetation at the Site to protect adjacent properties from parking lot and building light intrusion. (8) The Project will not present a demonstrable adverse impact on the surrounding area by noise, dust, smoke, or vibration during or post construction. C. Design (1) The Project design is located within the required setback areas with the building placed to minimize environmental impacts and provide for adequate access and circulation. (2) The building has been designed with appropriate architectural style for the area. (3) The Applicant proposes adequate screening of the use and components of the use through the use of natural vegetation, landscaping and fencing. (4) All proposed utilities shall be underground. (5) The proposed building is of similar, or smaller, size and scale as compared to other buildings on Willow Street and in the Project Vicinity. D. Traffic/Parking (1) The Project has been designed with a single curb cut located at the existing, previously approved wetland crossing. (2) The Project site is surrounded by resource areas. Connection to adjacent properties is not feasible. (3) The driveway location provides for safe and adequate site distance in the westerly and southerly directions. (4) The proposed driveway will serve only a single use. There are no joint-access driveways proposed. (5) Internal circulation is compliant with general engineering practice. 5 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover; Massachusetts E. Stormwater Management (1) The Project is not located within the Lake Cochichewick Watershed. The Project has been designed to conform with the Massachusetts Stormwater Standards. As previously identified a stormwater checklist and detailed stormwater management report are included in the Notice of Intent application, accompanying this report as Appendix B. (2) The Project is subject to action by the Conservation Commission and complies with the North Andover Stormwater Management and Erosion Control Bylaws. F. Landscape Design (1) A landscaping plan accompanies this Application as sheet C5 of the site plans. The Applicant has selected native vegetation that will provide habitat value, buffer zone enhancement, and aesthetic improvements to the Site. (2) Plant species selected are native to inland Essex County. IV. Compliance with �195-10.7—Special Permits In accordance with §195-10.7 of the Town of North Andover Zoning By-Law, the Planning Board shall consider the following criteria in making its decision. The Applicant has summarized the criteria and the Project's compliance with same below: A.(I)(a). The Site at 189 Willow Street is an underutilized parcel located within an area designated for development. The proposed use will expand commercial uses within the area and is appropriate in size and scale. A.(1)(b). The proposed use will not have adverse effects on neighborhood. The addition of a commercial use in this area will also help deter illegal dumping and trespassing at other underutilized parcels in the area. A.(I)(c). The Project will not create a nuisance of serious hazard to vehicles or pedestrians. A.(I)(d). The Project provides adequate facilities for the low impact office and service uses and will allow for proper operation of same. A.(I)(e). The Application presented to the Board substantiates a finding that the proposed use is in harmony with the general purpose and intent of the bylaws. V. Waiver Requests I. The Applicant seeks a waiver to the requirements that plans be prepared at a scale of I"=40' as the provided scale of 1"=30' provides for enhanced clarity. 2. The Applicant seeks a waiver to the requirement of providing a landscape plan prepared by a Registered Landscape Architect. The Applicant is seeking to enhance habitat at the 6 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover, Massachusetts site, as such the planting plan was developed in conjunction with a wetland scientist and botanist. 3. The Applicant requests a waiver for provision of a Grading and Drainage Plan. The site is sufficiently described, due to the minimal scope, with a single proposed site plan identifying grading, drainage, and utilities on a single sheet. 4. The Applicant requests a waiver to the provision of site topography at two-foot intervals. The flat topography in the center of the site is better represented using one-foot contour intervals. VT Traffic Impacts The proposed use is not anticipated to result in significant traffic impacts. The Institute of Transportation Engineers (ITE) Trip Generation Manual, 1 lth edition classifies the use as a small office building (Land Use Code 712). The following table summarizes the estimated trip generation for the facility: Table 1: Trip Generation LUC 712—Sniall Office Building LUC 712 Average LUC 7122 Trip Ends per Estimated Vehicle Time Period 1,000sf GFA Trip Ends') Weekday Daily 14.39 97 Weekday AM Peak Hour 2.61 18 Weekday PM Peak Hour 3.15 22 (1) Based on 7,800f square feet of GFA Massachusetts Department of Transportation (MassDOT) Highway Division maintains triffic count station Number 5130 on Ruooe 114 (Turnpike Street) immediately southeast of the intersection of Willow Street and Turnpike Street. Observed traffic on October 15, 2020 (the most recent count date with 15-minute intervals)resulted in the following results: Total 19,364 pT 16,045 AM Iea 07:1 .0 1 1300 PM peak 1610-17 00 1.6 The proposed trip generation from the use represents 0.6-percent of daily traffic, 1.3-percent of the AM peak, and 1.3-percent of the PM peak traffic at the site. MassDOT Transportation Impact Assessment (TIA) Guidelines state that, "Intersections or roadway segments where site- 7 Proposed Office/Service Building Vincent J. Grasso 189 Willow Street North Andover, Massachusetts generated trips increase the peak hour traffic volume by a)five (5)percent of more, or b) by more than 100-vehicles per hour should be included in the study." The Applicant does not exceed these thresholds and no anticipated adverse impacts to prevailing traffic conditions are anticipated by the proposed use. VIL Fiscal and Community Impacts The proposed project will not require any specific additional demand for public services or infrastructure. The Applicant hopes to expand opportunities for local businesses and service providers to maintain a presence in North Andover by providing small office space with potential garage bay for storage for use by various businesses such as engineers, surveyors, appraisers, etc. Existing infrastructure is installed to the site for water, sewer, drainage, electric, and telecommunications. The Project will provide office space for businesses with an expected occupancy of 12-15 employees that will contribute to local spending on goods, as well as provide opportunities for increased real estate tax and excise tax from real properties associated with the businesses. The Project as a whole is anticipated to increase revenue to the Town rather than be a burden on public services. The Project is buffered from adjacent residential properties on Bucklin Road by approximately 450 feet of wooded property. Adjacent properties to the south and east are commercial in nature. The proposed architecture is in harmony with the adjacent buildings on Willow and Turnpike Streets. 8 This page intentionally left blank Appendix A: Locus Deed This page intentionally left blank Bk 17600 Pg154 #24433 10-20-2022 @ 09t23a QUITCLAIM DEED We, Louisa M. Tanner and Timothy J. Tanner, Trustees of Willow Street Nominee Trust u/d/t dated March 17, 2011, as evidenced by Trustees' Certificate Pursuant to M.G.L. ch. 184 § 35, recorded with the Northern Essex Registry of Deeds in Book Q 12437, Page 187,of North Andover,Essex County, Massachusetts, for consideration paid, and in full consideration of Two Hundred Twenty-Five Thousand o and•00/100 ($225,000.00)Dollars, -v grant to Vincent J. Grasso, of 30 Faulkner Road, North Andover, Essex County, Massachusetts, , z • with QUITCLAIM COVENANTS cn 3 That certain parcel of land in North Andover, Essex County, Massachusetts, being shown as Parcel 4-2 on a plan entitled,"Plan of Land,Location, North Andover, MA,Owned by .Holbrook Realty Trust," dated October 30, 2001, and recorded with the Northern Essex Registry of Deeds as Plan No. 14283, and to which plan reference may be had for a more 00 particular description. Also see Affidavit dated December 24, 2010, recorded with said Registry in Book 12435,Page 131,and plan recorded as Plan No. 16410. Q Meaning and intending to describe and convey the same premises conveyed to us by deed of Sudarshan Chatterjee dated October 18, 2010, and recorded with the Northern Essex o Registry of Deeds on March.17,2011,in Book 12437,Page 188. OR ;. a We hereby state, under the pains and penalties of perjury, that the premises herein conveyed is vacant land, not a primary residence, and therefore no persons are entitled to claim homestead rights in said premises. MASSACHUSETTS STATE EXCISE TAX Essex North Registry Date: 10-20-2022 @ 09:23am Ctl#: 24 Doc#: 24433 we s7 n,>g nn r., - *"cs nnn nn _ Bk 17600 Pg155 #24433 Signature and Acknowledgment Page of Deed Re: 189 Willow Street, North Andover, Massachusetts 01845 Witness our hands and seals this 19'day of October,2022. Aol�/4� ui a M.Tanner,T ustee Timothy J.T r,Trustee COMMONWEALTH OF MASSACHUSETTS ESSEX,SS October ,2022 On this date, before me, the undersigned notary public, personally appeared the above-named, Louisa M. Tanner and Timothy J. Tanner, proved to me through satisfactory evidence of identification, being (check whichever applies): (X) driver's license or other state or federal government document bearing a photographic image, ( ) oath or affirmation of a credible witness known to me who knows the above signatory, or ( ) my own personal knowledge of the identity of the signatory, to be the persons whose names are signed on the preceding or attached document, and acknowledged to me that they signed it voluntarily for its stated .purpose as Trustees of W' w treet Nominee Trust,as the voluntary act of Willow Street Nominee Trust. ie A. ayes,Jr.,Notary Public My C6ffirnission Expires:.10/28/ 27 i's DANIEL A. HAYES, JR. NOTARY PUBLIC Commonwalth of Mossachusetts My Commission Ex ires October 2B, 201�7 M. PAUL IANNOCCILLO, REGISTER ESSEX NORTH REGISTRY OF DEEDS E-RECORDED Appendix B: Notice ofIntent This page intentionally left blank Notice of Intent Filed Under M.G.L. Chapter 131, Section 40 and the Town of North Andover Wetlands Protection Bylaw 189 Willow Street Map 25 Parcel 167 North Andover, Massachusetts Proposed Business Office Building Prepared by: Hayes Engineering, Inc. 603 Salem Street Wakefield, Massachusetts 01880 40$e4' p. 781.246.2800 f. 781.246.7596 71010 www.hayeseng.com Applicant and Owner: Vincent J. Grasso 30 Faulkner Road North Andover, Massachusetts 01845 November 7,2023 This Page Intentionally Left Blank Table of Contents Application Checklist—Notice of Intent Section 1 —Notice of Intent Forms 5 WPA Form 3 7 Filing Fee Worksheet 16 NOI Wetland Fee Transmittal Form 18 Copy of Filing Fee Checks 19 Section 2 —Notice of Intent Narrative 22 Introduction and Background 23 Site Description 23 Jurisdictional Resource Areas 23 Buffer Zone(s) 24 Work Description 25 Work in Resource Areas 25 Work in Buffer Zone(s) 26 Mitigation Measures 26 Erosion and Sedimentation Controls 26 Regulatory Compliance 28 Waiver Request 31 Summary 32 Construction Period Pollution Prevention Plan 33 Notice of Intent 189 Willow Street North Andover,MA Page 3 Appendices Appendix A: Previous Permits Order of Conditions—DEP File No. Certificate of Compliance—DEP File No. Appendix B: Figures Figure I — USGS Location Map Figure 2—FEMA Flood Insurance Rate Map Letter of Map Amendment 100 Willow Street Letter of Map Amendment 733 Turnpike Street Figure 3—NHESP Map Figure 4—NACC Resource Area Map Appendix C: Abutter Notifications Affidavit of Service List ofAbutters Abutter Notification Letter Appendix D: Stormwater Management Report Appendix E: Town of North Andover Waiver Request Form Plans Site Plan— 189 Willow Street Prepared by Hayes Engineering, Inc. Date: November 7, 2023 (6 sheets) Notice of Intent 189 Willow Street North Andover,MA Page 4 APPLICATION CHECKLIST Notice of Intent (NOI) Two (2) physical copies of the Notice of Intent(NOI)application,plans, attachments and appurtenant data and an electronic copy must be received in hand by the NACC office no later than 10:00 a.m. nine(9) business days prior to the target meeting date(NACC meeting schedule posted oil website). One(1) physical copy of materials to be mailed by certified mail or hand delivered to: DEP North East Regional Office 205B Lowell Street Wilmington, MA 01887 General Requirements—Wetland Protection Bylaw & Regulations: Please check the following boxes indicating that you have read& now understand the applicable rule and/or regulation: X1 Section 190-2(page 1)—identifies the Town's wetland resource areas. Section 190-4(page 2)—pertains to permit application types. (Note: All applications shall NOT be accepted as complete before all other permits,variances,and approvals required by the Bylaws of the Town with respect to the proposed activity, at the time of such Notice,have been applied for or obtained".This does not include building permits). ® Section 190-5 (page 3)—pertains to public hearings and the burden of proof placed on an applicant. ® Section 190-8 (page 6)—pertains to responsibility for compliance. ® Regulations Section '1.0(page 1)—pertains to general provisions General Application Requirements —Per North Andover Wetland Protection Regulations: ❑x NOI application,filled out and signed. 0 Site plan—true to scale (not reduced). **See Plan requirements below.** X Certified list of abutters prepared by the Town Assessor's Office within 300' of the parcel(s)where work is proposed. (NOTE: certified list shall not be more than 30 days old at the time of filing.) ® Abutter Notification Form.Notifications to abutters shall be made by certified mail or certificates of mailing not less than seven (7)calendar days prior to the public hearing. Proof of mailing shall be presented at that hearing in the form of"white slips"or signed"green cards."(Certificates of mailing is a less expensive option). 0 North Andover Riverfront Maps—USGS Topographic Map (Appendix B) -circle the project site and label it"Locus". 0 The most recent Estimated Habitat of Rare Wetlands Wildlife Map &Certified Vernal Pools map published by NHESP has been reviewed. ❑X Copies of the State Fee Transmittal Form and State Check. The State's portion of the State Filing Fee shall be sent to: DEP, Box 4062, Boston, MA 02211.Town portion of the state filing fee and the local Wetland Bylaw fee is to be included with the application (Section 1.4). Q NACC Bylaw Wetlands Filing Fee Calculation Worksheet. **Each separate activity within the project is assessed a fee and review of wetland delineation greater than 100 lineal feet is assessed a fee." n Check payable to the Town of North Andover in the amount of the Town's portion of the State fee AND the total Bylaw fee. Page 1 of 3 120 Main Street, Conservation Dept., North Andover Massachusetts 01845 Phone 978.688.9530 Fax 978,688.9542 Web www.northandoverma.gov_ Effective 03 23 16, Updated July 07 20 21 ❑x Written narrative of the proposed project and potential impacts to all wetland resource areas. x❑ Description of observed valuable and/or unique wildlife habitat characteristics. ❑ Wildlife Habitat Evaluation performed by a qualified Wetland/Wildlife Biologist (Section 6.2), where applicable. @ Waiver Request Form with Alternatives Analysis(Appendix D), if work is proposed within 25' NDZ/50' NBZ. ❑ Notification of public hearing made in the Lawrence Eagle Tribune at the applicant's expense not less than seven (7) calendar days prior to the public hearing. Conservation Staff will prepare the appropriate legal notice. Tile Tribune will contact the applicant for payment when proof is ready. All wetland resource area flags and associated numbering are present and easily readable in the field as of the date of this application. Stormwater Management Requirements (Section 7.0): Project is in compliance with the "Ten (10)North Andover/State Stormwater Standards", if applicable. DEP Stormwater Management Form has been submitted with the Notice of Intent and signed/stamped accordingly (Appendix H). Hydrologic/hydraulic calculations showing the full flow capacity and velocity of all water courses, open and only sometimes closed channels, and storm drains flowing into, on and Out of the parcel, including engineering calculations for compensatory flood storage areas have been incl. (Refer to Section 7.0). Erosion & Sedimentation Control Requirements (Section 7.1): nX Narrative erosion control plan and/or report provided for any proposed alteration of wetland resource areas, including the buffer zone. Construction schedule/sequence provided for any work within a wetland resource area including specifications for temporary and permanent ground cover. Plan Requirements (Section 4.3.2): ❑x Title should include name of the project, location and names of the person(s)preparing the drawings and the date prepared including any revision dates. ❑x Drawings must be stamped and signed by a Registered Professional Civil Engineer of the Commonwealth&/or Registered Professional Land Surveyor of the Commonwealth (whichever is applicable). All existing condition plans shall include, at a rninii-nurn,the following information: FX1 All wetland resource areas within 100' of the proposed work and within 200' of Riverfront Area with applicable no disturb and no build zones, delineated by a professional wetland scientist not more than 3 years from the application submission date. • Delineated by: Mission Wetland and Ecological on (date): October 7, 2022 OR • Formally approved delineation on (date): DEP File# 0 All property boundaries, existing lot lines and abutters from most recent information available at the Assessor's Office. ❑x Watershed Protection District Boundaries, Surface water supplies, wells, and septic systems within 100' of proposed work. Existing Contours at not less than 2' intervals and datum Source. Page 2 of 3 120 Main Street, Conservation Dept.,North Andover Massachusetts 01845 Phone 978.688.9530 Fax 978.688.9542 Web www.northandoverrng.qov_ Effective 03 23 16, Updated July 07 20 21 NX All existing natural and man-made features including tree lines, rock outcrops,Stolle walls, fence lines, cart roads, foot paths, overhead and Underground utilities and drainage structures. nX Elevations of all natural and man-made drainage structures, waterways, and wetlands. HX I 00-year flood elevations of all natural and/or man-made waterways and waterbodies as determined by FEMA or engineering calculations. El Subdivision plans shall be submitted at an appropriate scale to accurately depict existing and proposed conditions(typ.I" 40'). Individual parcels of land within the Subdivision and under the Wetlands Protection Act and North Andover Bylaw shall be submitted at an appropriate scale(typ. F=20'). All proposed/project condition plans shall include, at a minimum, the following information (p. 24): RX Location of proposed work with distances to wetlands, including project access and stockpile location. R All proposed man-made features including roads,driveways, parking areas, structures, buildings, overhead and underground utilities. nX Subsurface sewage disposal systems. nX Proposed grading and changes in elevation depicted with 2' Contours and spot grades. RX All surface and Subsurface drainage structures including the location, cross section, slope and Surface treatment of all drainage channels. FX1 The inverts, slope, pipe materials, catch basins, manholes, and end treatment of all storm drains discharging within 100' of any wetland resource area. nX Location and detail of all temporary erosion control devices, diversions,terraces, silt fences, hay bales barriers, sedimentation basins, and soil stockpile locations on the project site. Q Location and nature of all proposed alterations to and replication of wetland resource areas. **See Regulations Section 6.0 for details on replication requirements." %0_400-� 11-7-210,? Signature of Applicant or Applicant's Representative Date ----------- -------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------- ------------------ (TO WIV USE ONLY) F1 COMPLETE APPLICATION—It appears as though your application meets minimum submittal requirements, as such, a public hearing will be scheduled before the NACC within 21 days upon receipt of this application. ❑ INCOMPLETE APPLICATION-The following sections of the Wetland Protection Bylaw&/or Regulations have not been complied with and as a result this Department is rejecting this incomplete application w/in two (2)business days from the date of receipt (Section 1904A North Andover Wetland Protection Bylaw). You may pick up this application and supporting plans at the Conservation Office and re-file a complete Notice of Intent. Wetland Bylaw- Section(s): Wetland Regulations—Section(s): Signature of Agent: Date: Page 3 of 3 120 Main Street, Conservation Dept., North Andover Massachusetts 01845 Phone 978,688,9530 Fax 978,688.9542 Web www.northandoverrna.gov Effective 03 23 16, Updated July 07 20 21 i < �"� "��N �"��Via.P fit'"n'.. � f, F ',�`r �i,.,��y � ,�,��r✓? �1 r.c` e �,..� �.,:�»n:,-x.,,,,�, „'M J k4�✓' �' V ti l ' ri ar m ,r n N G i S;t k ""� ✓ s�L �� �/ t � a�aR „d d h"t;r � >�. Scale 1 42,000 0 1,750 3,500 " 'xbj � ". ``•"* +" },+yr�i`1 Nip f✓ if� J i� 't '4l rFS r i 1 inch=3,500 feet Feet p Copyright: National Geographic Society,i-cubed 02073N C 1 S ✓ Mernmack r w ✓ � /���� � �� '� � + �K� � �� � � ,�, V j �� }?°i /� � � i l`" IP t ✓ a v a � ` ,, � ,; �� r aft ' � " � k }a S.✓/f d 4 d i� tl,✓ r s fa rrkir9r yN' rWy "4, p t + fip �, " J,"�✓rs �n l rr.. 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Isolated Land Subject to Flooding 1.square feet 2.cubic feet of flood storage lost 3.cubic feet replaced f. Riverfront Area 1.Name of Waterway(if any) 2.Width of Riverfront Area(check one) l"25 ft.-Designated Densely Developed Areas only l" 100 ft.-New agricultural projects only l"200 ft.-All other projects 3.Total area of Riverfront Area on the site of the proposed project square feet 4.Proposed Alteration of the Riverfront Area: a.total square feet b.square feet within 100 ft. c.square feet between 100 ft. and 200 ft. Page 2 of 7 * ELECTRONIC COPY Massachusetts Department of Environmental Provided by MassDEP: Ll Protection MassDEP File#: Bureau of Resource Protection-Wetlands eDEP Transaction#:1611900 City/Town:NORTH ANDOVER WPA Form 3 -Notice of Intent .................Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 5.Has an alternatives analysis been done and is it attached to this NOI? i,Yes If'"'"`No 6.Was the lot where the activity is proposed created prior to August 1, 1996? r,Yes Ir"'No 3.Coastal Resource Areas:(See 310 CMR 10.25- 10.35) Resource Area Size of Proposed Alteration Proposed Replacement(if any) ................. .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,., .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,., .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,., .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,., .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,. .,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,. a.li""'"Designated Port Areas Indicate size under Land under the ocean below, b.li"Land Under the Ocean 1.square feet 2.cubic yards dredged c.Ii""'"Barrier Beaches Indicate size under Coastal Beaches and/or Coatstal Dunes,below d 1".".Coastal Beaches 1.square feet 2.cubic yards beach nourishment e.lr"Coastal Dunes 1.square feet 2.cubic yards dune nourishment £li"Coastal Banks 1.linear feet g.Ii""'"Rocky Intertidal Shores 1.square feet h Salt Marshes 1.square feet 2.sq ft restoration,rehab,crea. 0'°"°'Land Under Salt Ponds 1.square feet 2.cubic yards dredged j li"Land Containing Shellfish 1.square feet k.II°"°"'Fish Runs Indicate size under Coastal Banks,Inland Bank,Land Under the Ocean,and/or inland Land Under Waterbodies and Waterways,above 1.cubic yards dredged I.Ir"Land Subject to Coastal Storm Flowage 1.square feet 4.Restoration/Enhancement i"'"'" Restoration/Replacement If the project is for the purpose of restoring or enhancing a wetland resource area in addition to the square footage that has been entered in Section B.2.b or 13.3.h above,please entered the additional amount here. a.square feet of BVW b.square feet of Salt Marsh 5.1'rojects Involves Stream Crossings i°"°" Project Involves Streams Crossings Page 3 of 7 * ELECTRONIC COPY Massachusetts Department of Environmental Provided by MassDEP: Ll Protection MassDEP File#: Bureau of Resource Protection-Wetlands eDEP Transaction#:1611900 City/Town:NORTH ANDOVER WPA Form 3 -Notice of Intent . ............,....Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 If the project involves Stream Crossings,please enter the number of new stream crossings/number of replacement stream crossings. a.number of new stream crossings b.number of replacement stream crossings C.Other Applicable Standards and Requirements Streamlined Massachusetts Endangered Species Act/Wetlands Protection Act Review 1. Is any portion of the proposed project located in Estimated Habitat of Rare Wildlife as indicated on the most recent Estimated Habitat Map of State-Listed Rare Wetland Wildlife published by the Natural Heritage of Endangered Species program (NHESP)? a. 1....Yes II No If yes,include proof of mailing or hand delivery of NOI to: Natural Heritage and Endangered Species Program DiNision of Fisheries and Wildlife 1 Rabbit Hill Road Westborough,MA 0 15 81 b.Date ofmap:FROM MAP VIEWER If yes,the project is also subject to Massachusetts Endangered Species Act(MESA)review(321 CMR 10.18).... c.Submit Supplemental Information for Endangered Species Review*(Check boxes as they apply) 1.1°'° Percentage/acreage of property to be altered: (a)within Wetland Resource Area percentage/acreage (b)outside Resource Area percentage/acreage 2 1— Assessor's Map or right-of-way plan of site 3.1" Project plans for entire project site,including wetland resource areas and areas outside of wetland jurisdiction,showing existing and proposed conditions,existing and proposed tree/vegetation clearing line,and clearly demarcated limits of work** a.lr",Project description(including description of impacts outside of wetland resource area&buffer zone) b 1.... Photographs representative of the site c.lI MESA film fee fee information available at:h //w-ww.mass.,g genies/dfg/dfw/natural-heritage/re ug <ijigry- review/mass-endangered-species-act-mesa/mesa-fee-schedule.html) Make check payable to"Natural Heritage&Endangered Species Fund"and mail to NHESP at above address Projects altering 10 or more acres of land, also submit: d.1°'°`Vegetation cover type map of site e.lr",Project plans showing Priority&Estimated Habitat boundaries d.OR Check One of the following I.1°'°` Project is exempt from MESA review.Attach applicant letter indicating which MESA exemption applies.(See 321 CMR 10.14,h!W://www.mass.gov/eea/agencies/d&dfw/laws-regulations/cmr/321-cmr-1000-massacbusetts-endangered- species-act.html#10.14;the NOI must still be sent to NHESP if the project is within estimated habitat pursuant to 310 CMR 10.37 and 10.59.) 2 1°'°` Separate MESA review ongoing. a.NHESP Tracking Number b.Date submitted to NHESP Page 4 of 7 * ELECTRONIC COPY Massachusetts Department of Environmental Provided by MassDEP: Ll Protection MassDEP File#: Bureau of Resource Protection-Wetlands eDEP Transaction#:1611900 City/Town:NORTH ANDOVER WPA Form 3 -Notice of Intent .................Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 3.11" Separate MESA review completed. Include copy of NHESP"no Take"determination or valid Conservation&Management Permit with approved plan. Some projects not in Estimated Habitat may be located in Priority Habitat,and require NHESP review... 2. For coastal projects only,is any portion of the proposed project located below the mean high waterline or in a fish tun? a.N; Not applicable-project is in inland resource area only b. 1....Yes I�"" No If yes,include proof of mailing or hand delivery of NOi to either: South Shore-Cohasset to Rhode Island,and the Cape&Islands: North Shore-Hull to New Hampshire: Division of Marine Fisheries- Division of Marine Fisheries- Southeast Marine Fisheries Station North Shore Office Attn:Environmental Reviewer Attn:Environmental Reviewer 836 S.Rodney French Blvd 30 Emerson Avenue New Bedford,MA 02744 Gloucester,MA 01930 If yes,it may require a Chapter 91 license.For coastal towns in the Northeast Region,please contact MassDEP's Boston Office. For coastal towns in the Southeast Region,please contact MassDEP's Southeast Regional office. 3. is any portion of the proposed project within an Area of Critical Environmental Concern(ACEC)? a.Ir Yes No if yes,provide name of ACEC(see instructions to WPA Form 3 or DEP Website for ACEC locations).Note: electronic filers click on Website. b.ACEC Name 4. Is any portion of the proposed project within an area designated as an Outstanding Resource Water(ORW)as designated in the Massachusetts Surface Water Quality Standards,314 CMR 4.00? a. 1....Yes II No 5. Is any portion of the site subject to a Wetlands Restriction Order under the Inland Wetlands Restriction Act(M.G.L.c. 131,§ 40A)or the Coastal Wetlands Restriction Act(M.G.L.c. 130,§ 105)? a 1....Yes I"r"'No 6. Is this project subject to provisions of the MassDEP Stonnwater Management Standards? a.1J Yes,Attach a copy of the Stonnwater Report as required by the Stonnwater Management Standards per 310 CMR 10.05(6)(k)-(q)and check if: 1. Applying for Low Impact Development(LID)site design credits(as described in Stoirnwater Management Handbook Vol.2,Chapter 3) 2. A portion of the site constitutes redevelopment r 3.- ' Proprietary BMPs are included in the Stonnwater Management System b.11°°°° No,Explain why the project is exempt: 1 Single Family Home I2 Emergency Road Repair Page 5 of 7 * ELECTRONIC COPY Massachusetts Department of Environmental Prodded by MassDEP: Ll Protection MassDEP File#: Bureau of Resource Protection-Wetlands eDEP Transaction#:1611900 City/Town:NORTH ANDOVER WPA Form 3 -Notice of Intent .................Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 3. Small Residential Subdivision(less than or equal to 4 single-family houses or less than or equal to 4 units in multi-family r"' housing project)with no discharge to Critical Areas. D. Additional Information Applicants must include the following with this Notice of intent(NOI).See instructions for details. Online Users:Attach the document transaction number(provided on your receipt page)for any of the following information you submit to the Deparhnent by regular mail delivery. 1. USGS or other map of the area(along with a narrative description,if necessary)containing sufficient information for the �' Conservation Commission and the Department to locate the site.(Electronic filers may omit this item.) 2. Plans identifying the location of proposed activities(including activities proposed to serve as a Bordering Vegetated Wetland �' [BVW]replication area or other mitigating measure)relative to the boundaries of each affected resource area. 3. Identify the method for BVW and other resource area boundary delineations(MassDEP BVW Field Data Form(s). �' Determination of Applicability,Order of Resource Area Delineation,etc.),and attach documentation of the methodology. 4. List the titles and dates for all plans and other materials submitted with this NOI. a.Plan Title: b.Plan Prepared By: c.Plan Signed/Stamped By: c.Revised Final Date: e.Scale: SPECIAL PERMIT SITE PLAN- 189 HAYES WILLOW STREET, ENGINEERING,INC. ERIC B.LANE,PE 11/7/2023 1"=30' NORTH ANDOVER, MA 5. if there is more than one property owner,please attach a list of these property owners not listed on this form. 6. Attach proof of mailing for Natural Heritage and Endangered Species Program,if needed. 7. Attach proof of mailing for Massachusetts Division of Marine Fisheries,if needed. 8. Attach NOI Wetland Fee Transmittal Form. 9. Attach Stormwater Report,if needed. Page 6 of 7 * ELECTRONIC COPY Massachusetts Department of Environmental Provided by MassDEP: Ll Protection MassDEP File#: Bureau of Resource Protection-Wetlands eDEP Transaction#:1611900 City/Town:NORTH ANDOVER WPA Form 3 -Notice of Intent . .................Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 E.Fees 1. Fee Exempt:No tiling fee shall be assessed for projects of any city,town,county,or district of the Commonwealth,federally recognized Indian tribe housing authority,municipal housing authority,or the Massachusetts Bay Transportation Authority. Applicants must submit the following information(in addition to pages 1 and 2 of the NOT Wetland Fee Transmittal Form)to confirm fee payment: 120 11/5/23 2.Municipal Check Number 3.Check date 119 11/5/23 4.State Check Number 5.Check date Vincent Grasso 6.Payer name on check:First Name 7.Payer name on check:Last Name F.Signatures and Submittal Requirements 1 hereby certify under the penalties of perjury that the foregoing Notice of Intent and accompanying plans,documents,and supporting data are true and complete to the best of my knowledge.T understand that the Conservation Commission will place notification of this Notice in a local newspaper at the expense of the applicant in accordance with the wetlands regulations,310 CMR 10.05(5)(a). I further certify under penalties of perjury that all abutters were notified of this application,pursuant to the requirements of M.G.L.c.131,§40. Notice must be made by Certificate of Mailing or in writing by hand delivery,or certified mail(return receipt requested)to all abutters within 100 feet of the property line of the project location. See next page. 1.Signature of Applicant 2.Date 3.Signature of Property Owner(if different) 4.Date 5.Signature of Representative(if any) 6.Date For Conservation Commission: Two copies of the completed Notice of Intent(Form 3),including supporting plans and documents,two topics of the NOT Wetland Fee Transmittal Form,and the city/town fee payment,to the Conservation Commission by certified mail or hand delivery. For MassDEP: One copy of the completed Notice of Intent(Form 3),including supporting plans and documents,one copy of the NOT Wetland Fee Transmittal Form, and a copy of the state fee payment to the MassDEP Regional Office(see Instructions)by certified mail or hand delivery. Other: If the applicant has checked the"yes"box in Section C,Items 1-3,above,refer to that section and the Instructions for additional submittal requirements. The original and copies must be sent simultaneously.Failure by the applicant to send copies in a timely manner may result in dismissal of the Notice of Intent. Page 7 of 7 * ELECTRONIC COPY 4 Massachusetts Department of Environmental Protection Provided»vmassoEF: RUPe@UDf Resource Protection - Wetlands MassDEP File Number ����� �& ����0��M� �� Notice � Intent ��0-�� �-~~. .°. `� '� xn���U�� ��m Massachusetts Wetlands Protection Act M.G.[. C. 131. 840 F. Signatures and Submittal Requirements | hereby oodifv under the penalties of perjury that the foregoing Notice of Intent and accompanying p|ans, dooumenta, and supporting data are true and complete tothe best ofmy knowledge. | understand that the Conservation Commission will place notification of this Notice in o local newspaper at the expense of the applicant in accordance with the wetlands regulations, 310 CIVIR 10.05(5)(a). | further certify under penalties of perjury that all abutters were notified of this app|icmtion, pursuant to the requirements ofM.G.L. o. 131. § 4O. Notice must be made by Certificate of Mailing orinwriting by hand delivery or ceirtified mail (return receipt requested)t U abutters within 1OU feet of the property line of the cc| 7 ----—-—--------- ------------------------------------ a—Signature Pr erty Owner W, P.,ent) 4. Date 5.Signature of RepresE;-ntative(if any) 6. Date For Conservation Commission: Two copies of the completed Notice of Intent (Form 3), including supporting plans and documenta, two copies of the NO| Wetland Fee Transmittal Form, and the city/town fee payment, to the Conservation Commission by certified mail or hand delivery. ForK8osaDEP: One copy of the completed Notice of Intent (Form 3), including supporting plans and documente, one copy of the NOI Wetland Fee Transmittal Form, and a copy of the state fee payment to the MooaDEP Regional Office (see Instructions) by certified mail or hand delivery. Other: If the applicant has checked the "yes" box in any part of Section C, Item 3, above, refer to that section and the Instructions for additional submittal requirements. The original and copies must be sent simultaneously. Failure by the applicant to send copies in a timely manner may result in dismissal of the Notice of Intent. wmmfo,m3.uoc`rev.0/10202o Page eofe Provided by MassDEP: Massachusetts Department of Environmental Protection Bureau of Resource Protection-Wetlands MassDEP File#: Ll WPA Form 3 -Notice of Wetland FeeTransmittal eDEP Transaction#:1611900 City/Town:NORTH ANDOVER UPP" Formm .................Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 A.Applicant Information 1.Applicant: a.First Name VINCENT b.Last Name GRASSO c.Organization d.Mailing Address 30 FAULKNER ROAD e.City/Town NORTH ANDOVER f State MA g.Zip Code 01845 h.Phone Number 9785027506 i.Fax j.Email vjgrasso@gmail.com 2.Property Owner:(if different) a.First Name VINCENT b.Last Name GRASSO c.Organization d.Mailing Address 603 SALEM STREET,WAKEFIELD,MA,01880 e.City/Town NORTH ANDOVER f.State MA g.Zip Code 01880 h.Phone Number 17813155733 i.Fax j.Email tcapachietti@hayeseng.com 3.Project Location: a.Street Address 189 WILLOW STREET b.City/Town NORTH ANDOVER Are you exempted from Fee? Ir Note:Fee will be exempted if you are one of the following: • City/Town/County/District • Municipal Housing Authority • Indian Tribe Housing Authority • MBTA State agencies are only exempt if the fee is less than$100 B.Fees Activity Type Activity Activity Fee RF Multiplier Sub Total Number B.)EACH BUILDING(FOR DEVELOPMENT) 1 1050.00 1050.00 INCLUDING SITE; City/Town share of filling fee State share of filing fee Total Project Fee $537.50 $512.50 $1,050.00 Page 1 of 1 * ELECTRONIC COPY NACC WETLANDS FILING FEE CALCULATION WORKSHEET CATEGORY 1: $110 per Activity (NOI/RDA) #of Activities Total$ a. Work on single family lot; addition, pool, patio, shed, landscaping, etc. b. Site work without a house c. Control of nuisance vegetation on single family house lot d. Resource area improvement,other than control of nuisance vegetation e. Work on septic system separate from house f. Monitoring well activities minus roadway g. New agricultural or aquacultural projects TOTAL CATEGORY 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ CATEGORY 2: $500 per Activity (NOI/RDA) #of Activities Total$ a. Construction of single family house (SFH) b. Parking lot c. Beach nourishment(placement of sand) d. Electric generating facility activities e. Inland limited projects minus road crossings &agriculture f. Each crossing for driveway to single family house g. Each point source(storm drain) discharge h. Control nuisance vegetation other than for single family house lot i. Water level variation j.Any other activity not in Category 1, 3,4, S, 6 or 7 k. Water supply exploration TOTAL CATEGORY 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ CATEGORY 3: $800 per Activity(NOI/RDA) #of Activities Total$ a. Site preparation (for development)where actual construction is not proposed b. Each building(for development) including site preparation 1 $800 c. Road construction not a limited project crossing or driveway d. Hazardous waste cleanup e. Water supply development TOTAL CATEGORY 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Page 1 of 2 NACC WETLANDS FILING FEE CALCULATION WORKSHEET(continued) CATEGORY 4: $1,000 Activity(NOI/RDA) #of Activities Total$ a. Each limited project roadway crossing for development or commercial road b. Flood Control Structure(da, sluiceway,tidegate)work c. Landfills operation/closures d. Sand &gravel operations e. Railroad line construction f. Bridge (except for single family house lot) g. Hazardous waste alterations to resource area h. Dredging i. Package treatment plant&discharge j.Airport tree clearing k. Oil and hazardous material release response actions I.Activities associated with assessment, or response to release of oil TOTAL CATEGORY 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ #of Feet CATEGORY 5: $4 per Linear Foot-Min of$100, No Max(NOI/RDA) a. Work on docks, piers, revetments, dikes, etc. (coastal or inland) TOTAL CATEGORY 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ #of Feet CATEGORY 6: $1 per Linear Foot-Minimum of$100, No Max a. Boundary delineations for Bordering Vegetated Wetlands TOTAL CATEGORY 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ Add 50 percent if in a Riverfront Area in addition to another Resource Area/Buffer Zone x.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ #of Feet Bylaw wetland delineation review under NOI $1 per Linear Foot(First 100 ft included in Category 1-5, Not 6) 1,6371f total- 1001f=1,5371f TOTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ $1,537 AFTER-THE-FACT FILING FEE x3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ TOTAL FILING FEE Sum of Totals in Categories 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . $ Late Filing Penalty(applies to all filings demed as after-the-fact) 3x the normal fee per the above schedule Small Project $ 25.00 Modification/Amendment Request(x2 if after-the-fact) $ 200.00 Partial Certificate of Comapliance Request $ 200.00 Certificate of Compliance $ 200.00 Extension Permit Request $ 200.00 Removal of an Enforcement Order(if N01 is not required and fines have not been issued) $ 100.00 Additional Inspectional Services $ 100.00 Page 2 of 2 ............. ........... VINCENT j GRASSO 53-274/113 119 APRIL GRASSO 30 FAULKNER RD. NORTH ANDOVER,MA 01845-3920 DATE LAY THEORIDEffOl' Heat -D(' Reactive "li,'LARI Ink Enterprise Bank E"111=1111 10 ,al"TU MEMO LiLiL i'M L 130 274 2100 Ll LiBIGS 1,911110 1 L9 ...........LO(�IF,qRFRLUD-.DEjE INFEATURES THE SECURITY_S%ftp AND NEATREACTIVE INK.dETAILS ON SACK.VINCENT j GRASSO 53-274/113 120 APRIL GRASSO 30 FAULKNER RD. DATE NORTH ANDOVER,MA 01845-3920 SAY FQ --lu THE ORDER OF Heat "' "�7OLLARS Inkactrve Enterprise EntwpllsP Bank 'LCN'gq �VTVIII'r ll aA" E� MFMO L 30 2 ?4 2100 Ll LIBIG L900 1; 20 ' L OKI -RA. 1,,t'T.UR SlNCl-Ujjl!.G,jH E3 nECURT BpUAHwEwAiW_H io TmmR_ACw��auii IN, 1,T.I VINCENT j GRASSO 53-274/113 121 APRIL GRASSO 30 FAULKNER RD. Z NORTH ANDOVER,MA 01845-3920 DATE PAY To Qjj �-D 44 )(dr ME ORDER OF o rrcl I I DOLLARS Enterprise Bank EM.,pW Burk&Trust CSoMmp=yMSLOWELL, A SACHU MEMO ,am 0 L L 30 2 74 2 18 6 S 1,900 L 2 1 Fp UD-DETER RING FEATURES INCLUDING TH".SECURITY N 0',HEAT pEA,0. INK.DETAILS ON BACK., Section 2 — Notice of Intent Narrative ➢ Introduction & Background ➢ Site Description ➢ Work Description ➢ Mitigation Measures ➢ Regulatory Compliance ➢ Summary Notice of Intent 189 Willow Street North Andover,MA Page 21 This Page Intentionally Left Blank Notice of Intent 189 Willow Street North Andover,MA Page 22 Introduction and Backgroun Vincent J. Grasso, hereinafter the "Applicant," "Owner," and/or the "Proponent," seeks to construct a commercial building for use as a business office, associated parking, landscaping, utilities and stormwater management appurtenances (the Project or the Work). The work is proposed within the buffer zone to a bordering vegetated wetland (BVW), within the isolated vegetated wetland(IVW) of local jurisdiction, and minor impacts to bordering land subject to flooding (BLSF). The Project will require relief to the local No Disturbance Zone (NDZ) and No Build Zone (NBZ). This Notice of Intent is filed for the proposed work within jurisdictional resource areas and/or their buffer zones protected under the Massachusetts Wetlands Protection Act(MGL c. 131, Sec. 40; the Act) and its implementing Regulations (310 CMR 10.00, et seq.; the Regulations) and lands protected by the Town of North Andover Wetlands By-Law and its regulations. The work involves both temporary and permanent disturbances to these protected areas or their buffer zones. The following narrative provides a description of the site, associated resource areas,proposed activities and mitigation measures. Specific Project details are depicted on the accompanying Site Plan— 189 Willow Street in North Andover; Massachusetts (6 sheets)prepared by Hayes Engineering, Inc. and dated November 7, 2023. Site Description The Project Site, located at 189 Willow Street is located within an existing commercial area to the west of Turnpike Street (Route 114) and along the easterly sideline of Willow Street. The site was previously permitted with an Order of Conditions issuing on May 4, 2005, for the construction of a commercial building and parking under DEP File No. 242-1279. The work proceeded with tree clearing, stripping of soil and installation of a box culvert to across the BVW resource area adjacent Willow Street. The building and parking were never constructed. A Certificate of Compliance was issues on September 14, 2009, for the work performed. The site is now revegetated with white pine saplings and opportunistic, hydrophytic vegetation in the areas of previous disturbance. The general location of the project is depicted on Figure 1 — USGS Location Map. The Project site includes the following jurisdictional resource areas and buffer zones: Jurisdictional Resource Areas Bordering_Vegetated Wetlands Bordering Vegetated Wetlands (BVW) are freshwater wetlands which border on creeks, rivers, streams,ponds and lakes. The types of freshwater wetlands are wet meadows, marshes, swamps and bogs. BVW are areas where the soils are saturated and/or Notice of Intent 189 Willow Street North Andover,MA Page 23 inundated such that they support a predominance of wetland indicator plants. The ground and surface water regime and the vegetational community which occur in each type of freshwater wetland are specified in M.G.L. c. 131, § 40. The BVW associated with the Site surrounds the upland areas to the North, West, South and East. A previously installed box culvert spanning the southerly portion of the BVW was previously installed. BVW is represented by the "A"Flag Series on the accompanying plans. BVW is jurisdictional under the WPA and the Town of North Andover Wetland Bylaw. Isolated Vegetated Wetlands Isolated Vegetated Wetlands protected under the North Andover Wetlands Bylaw are freshwater wetlands, of at least 1,000 sq. ft. in surface area, that do not border on creeks, rivers, streams,ponds, or lakes. The types of Isolated Vegetated Wetlands may include wet meadows, marshes, swamps, and bogs. The IVW associated with the Site is located within the center upland areas. The site was previously permitted with several, small, isolated wetland pockets that were less than 1,000-sf. (each) in land area. Under the previous order of conditions this land was disturbed and stripped of top soil allowing the depression to merge into one larger isolated wetland area. As such, the area has expanded since the 2005 Order of Conditions (OOC) as the topsoil was stripped and grading commenced under the permit. The work remained unfinished and opportunistic, hydrophytic vegetation has taken root within the area indicated on the plans. The extent of the IVW is identified by the `B" Flag Series. Section 3.2 of the North Andover Wetlands Regulation states: Where a proposed activity involves the removing,filling, dredging or altering of an Isolated Vegetated Wetland, the Commission shall presume that the Isolated Vegetated Wetland is significant to the interests specified in Section 1.2 of these regulations. This presumption is rebuttable and may be overcome upon a clear showing that the Isolated Vegetated Wetland does not play a role in the protection of said interests. In the event that the presumption is deemed to have been overcome, the Commission shall make a written determination to this effect, setting forth its grounds. The interests identified in Section 1.2 are: Wetlands contribute to a number of public interests and are therefore protected by the Bylaw. The Bylaw identifies three additional public interests not recognized by the Massachusetts Wetlands Protection Act("the Act" or "WPA"). These are: "the prevention and control of erosion and sedimentation, the protection of wildlife, and Notice of Intent 189 Willow Street North Andover,MA Page 24 the protection of recreation". Any permit issued under the Bylaw and Regulations must therefore not adversely affect these additional public interests. The IVW resource area on this site has been previously disturbed,has minimal top-soil and has little value for the prevention and control of erosion and sedimentation. The area is overgrown with invasive and opportunistic species and provides little wildlife habitat value. The site is private property and not available for recreational use. This resource area does not rise to the presumption of significance as evidenced by the granting of a previous Order of Conditions allowing work within said areas. The Applicant respectfully requests the Commission make a finding that the IVW resource area does not play a role in the protection of the interests of Section 1.2 of the North Andover Wetland Regulations and the proposed mitigation provides an improvement over existing site conditions. Bordering Land Subject to Flooding Bordering Land Subject to Flooding is an area with low, flat topography adjacent to and inundated by flood waters rising from creeks, rivers, streams, ponds or lakes. It extends from the banks of these waterways and water bodies; where a bordering vegetated wetland occurs, it extends from said wetland. The extent of the resource area was determined through information provided by the National Flood Insurance Program (NFIP) Flood Insurance Rate Map (FIRM), Map 25009 CO236F (see Figure 2 - FIRM), revised through July 3, 2012. The NFIP issued two (2) letters of map amendment (LOMA) for properties immediately upstream and downstream of the Project. Because the flood elevation was not established the higher of the LOMA elevations (NAVD Elevation 236.5)was used as the extent of this resource area. Natural Heritage and Endan_er�pecies Pro_gram The site does not contain any Priority or Estimated Habitat Areas, nor does it contain any Certified or Potential Vernal Pools as depicted on Figure 3 —NHESP Map. BuL{er Zones A 100-foot buffer to the BVW and IVW is depicted on the accompanying plans. The proposed Work is wholly within the 100-foot buffer zones under state and/or local jurisdiction. The local 25-foot No Disturbance Zone (NDZ) is depicted on the accompanying plans, an alternatives analysis and waiver request accompany this application. The local 50-foot No Build Zone is depicted on the accompanying, an alternatives analysis and waiver request accompany this application. Notice of Intent 189 Willow Street North Andover,MA Page 25 Work Description The Project consists of the construction of a 6,667-s£ business office building, associated parking, utilities, and stormwater management appurtenances. The Project is located wholly within the 100-foot buffer zone with portions located within the 25-foot no disturbance zone and 50-foot no build zone. Honoring these zones would render any project on the site unfeasible and result in the Proponents inability to use the Property. As indicated previously a waiver request and alternatives analysis for this work is included as Appendix E. These proposed activities are further detailed on the accompanying Plan to Accompany Notice of Intent in North Andover, Massachusetts (attached). Although construction timing and construction"means and method" sequencing is subject to change, it is anticipated that the following general sequence will be followed: 1. Prior to construction the Applicant will install erosion and sedimentation controls on the site. 2. Upon installation of erosion controls and inspection, a pre-construction conference with project stakeholders will be held to further discuss project timing and reporting. 3. While the work is ongoing the contractor will follow the continued monitoring and repair of erosion and sedimentation controls as detailed in the accompanying Construction Period Pollution Prevention Plan. 4. Tree clearing and removal of topsoil will commence. 5. Foundation installation and preparation of the proposed driveway will commence. 6. Construction of the site drive,parking, utilities, and drainage. 7. Installation of landscaping. 8. As-built survey documenting compliance and request for Certificate of Compliance. Work in Resource Areas The Project proposes minor disturbances to the state and local jurisdictional bordering land subject to flooding. The proposed work will result in 269 square feet(34 cubic feet) of disturbance to the BLSF resource area. The Proponent will create 428 square feet(54 cubic feet) of compensatory storage to mitigate the proposed filling, as tabulated below: Notice of Intent 189 Willow Street North Andover,MA Page 26 BLSF Fill: Change in Cumulative Elevation Area Average Area Height Volume Volume eet N VD ) Z36.25 �r s � sf (feet) p I �cf( f 0 � I Iw OW 135 25 34 0. 236.5 269 ,i ___ �__ ____ 34 BLSF Created: Change in Cumulative Elevation Area Average Area Height Volume Volume feet NAVD88 Uff sf �feet� c�f cf. 236.25 0 0 214 0.25 54 236.5 428 54 The Project will result in the loss of 3,664 square feet local jurisdictional IVW that has no significance under the North Andover Regulations as described above. Nevertheless, the Applicant is proposing 610 square feet of replicated IVW and an additional 4,438 square feet of replicated BVW at the Site resulting in a 1.4:1 replacement ratio. Work in Buffer Zone(s) The entire site is located within the 100-foot buffer zone to BVW and IVW. Mitigation Measures Construction activities, including foundation excavation and grading will create erodible surfaces and should be limited to those areas necessary to safely operate equipment and conduct the proposed work. A construction period pollution prevention plan accompanies this report detailing construction best practices. Erosion and Sedimentation Controls An erosion and sedimentation control program will be implemented to protect resource areas from sedimentation due to the proposed construction activities. Work and stockpile areas are to be protected by an erosion control barrier prior to construction and erosion controls shall remain in place until all disturbed areas are stabilized. Erosion and sedimentation controls proposed are indicated on the accompanying Plan to Accompany Notice oflntent on Sheet 3 of 6. Erosion and sedimentation controls proposed for the Project include the following: Notice of Intent 189 Willow Street North Andover,MA Page 27 Erosion Control Barriers Prior to any construction activities on the site, a barrier of staked straw wattles will be installed in accordance with the accompanying plans. As construction progresses, additional rows of wattles will be installed around the base of stockpiles and other erosion prone areas. Wattle installation should be inspected weekly, at a minimum, during construction activities and after significant rainfall events. If sediment has accumulated to a depth impairing the proper function of the wattle barrier, it will be removed and reused on-site or disposed of at a suitable offsite location. Any damaged section of wattle shall be repaired or replaced immediately upon discovery. Catch Basin Inlet Protection All existing and proposed catch basins on-site and within 200-feet of the work area, shall be fitted with Siltsack®, or equivalent, catch basin filters. Catch basin filters should be inspected weekly, at a minimum, during construction activities and after significant rainfall events. If sediment has accumulated to a depth impairing the proper function of the filter, the sediment will be removed and reused on-site or disposed of at a suitable offsite location. Any damaged catch basin filters shall be repaired or replaced immediately upon discovery. Stabilized Construction Entrance A stabilized construction entrance/tracking pad should be provided in locations where construction vehicles will transition from pervious (grass, dirt, etc) surfaces onto paved surfaces to mitigate the tracking of sediment onto adjacent public rights of way. The construction entrance shall consist of 1-'/z-inch crushed stone placed 12-inches deep. The construction entrance should be a minimum of 10-feet in width and 50-feet in length. The entrance should be maintained in a condition that will prevent tracking or flowing of sediment onto public rights-of-way. This may require the periodic topdressing with additional stone. The entrance should be inspected weekly and after significant rainfall events. Any mud or sediment tracked onto adjacent roadways should be removed immediately. Non-structural Practices Non-structural best management practices to be used during construction include pavement sweeping, dust control, temporary stabilization, and temporary seeding. These practices should be applied as applicable during construction activities. Notice of Intent 189 Willow Street North Andover,MA Page 28 Pavement Sweeping On-site driveways,parking areas and adjacent roadways should be swept as necessary during construction activities. Sweeping may be done by hand or mechanically. Dust Control Dust control should be provided by soil wetting only, the use of calcium chloride or other chemical means of dust prevention shall not be used on the Project. When necessary, exposed surfaces should be wetted to prevent wind-borne transport of sediment(dust). Water should be applied in a volume equivalent to '/2-inch over the exposed areas. The water should be applied in a manner that minimizes erosion, such as a mechanical sprayer mounted to a water truck. Temporary Stabilization Any areas of exposed soil or soil stockpiles that will remain inactive for more than 14- days shall be covered with a layer of straw mulch applied at a rate of 90 pounds per 1,000 sf. The mulch should be anchored with a tacking coat, applied by hydro seeder. Steep slopes (greater than 15%) should be covered with fiber mats and anchored with photodegradable staples at a density in accordance with the manufacturer's specifications. Temporary Seeding If conditions allow, temporary vegetative cover should be established on areas of exposed soil (including soil stockpiles) that remain inactive for more than 60-days. The seed mixture should be applied by a hydro-seeder with a tacking coat and should include a mixture of rapid germinating grasses that are indigenous to New England. Stormwater Controls The Project is subject to the requirements of the Massachusetts Stormwater Handbook and the Town of North Andover Stormwater Standards. Please refer to Appendix D— Stormwater Management Report for detailed hydrologic calculations and analysis. Re u.�ry Compliance The Regulations under the Act identify several Performance Standards for proposed work activities within jurisdictional resource areas and buffer zones. Notice of Intent 189 Willow Street North Andover,MA Page 29 Bordering Vegetated Wetlands (BVW) No work is proposed within this resource area. The Project is wholly located within the 100-foot buffer zone to a BVW. The Project, as designed, minimizes impacts to the BVW to the maximum extent practicable and provides requisite stormwater management and erosion controls such that the Project will have no adverse effect to this resource area. Isolated Vegetated Wetlands (IVW IVW is a resource area under local jurisdiction only. The IVW areas at the site have expanded due to incomplete site grading associated with the previous OOC issued for the Site. The Applicant proposes to construct over portions of this IVW area and provide replication to the maximum extent practicable. The Project would not be able to be constructed without this disturbance. Section 3.2 of the North Andover Wetlands Regulation states: Where a proposed activity involves the removing,filling, dredging or altering of an Isolated Vegetated Wetland, the Commission shall presume that the Isolated Vegetated Wetland is significant to the interests specified in Section 1.2 of these regulations. This presumption is rebuttable and may be overcome upon a clear showing that the Isolated Vegetated Wetland does not play a role in the protection of said interests. In the event that the presumption is deemed to have been overcome, the Commission shall make a written determination to this effect, setting forth its grounds. The interests identified in Section 1.2 are: Wetlands contribute to a number of public interests and are therefore protected by the Bylaw. The Bylaw identifies three additional public interests not recognized by the Massachusetts Wetlands Protection Act("the Act" or "WPA'). These are: "the prevention and control of erosion and sedimentation, the protection of wildlife, and the protection of recreation". Any permit issued under the Bylaw and Regulations must therefore not adversely affect these additional public interests. The IVW resource area on this site has been previously disturbed,has minimal top-soil and has little value for the prevention and control of erosion and sedimentation. The area is overgrown with invasive and opportunistic species and provides little wildlife habitat value. The site is private property and not available for recreational use. This resource area does not rise to the presumption of significance as evidenced by the granting of a previous Order of Conditions allowing work within said areas. Notice of Intent 189 Willow Street North Andover,MA Page 30 The Applicant respectfully requests the Commission make a finding that the IVW resource area does not play a role in the protection of the interests of Section 1.2 of the North Andover Wetland Regulations and the proposed mitigation provides an improvement over existing site conditions. Bordering Land Subject to Flooding BLSF) The Project proposes minor disturbances to the state and local jurisdictional bordering land subject to flooding. The proposed work will result in 269 square feet(34 cubic feet) of disturbance to the BLSF resource area. The Proponent will create 428 square feet(54 cubic feet) of compensatory storage to mitigate the proposed filling, as tabulated below: BLSF Fill: Change in Cumulative Elevation Area Average Area Height Volume Volume (feet NAVD88) (sf.) (SE) (feet) (cf.) (cf.) 236.25 0 0 135 0.25 34 236.5 269 I 34 BLSF Created: Change in Cumulative Elevation Area Average Area Height Volume Volume Meet NAVD88 w sfa sf ......,...,...,...,...,...,...,,Ifeet e w�,. �,� �,� .,. wwwww w cf. 236.25 0 0 214 0.25 54 236.5 428 _ .__ 54 25-Foot NDZ and 50-Foot NBZ Waiver Requests As identified herein the IVW and BVW resource areas have associated 25-foot and 50-foot buffer zones requiring a waiver from the Local Regulations. Other resource areas at the site are identified in the sections above. The Applicant is seeking: 1. A finding that the IVW areas on-site do not rise to the Presumption of Significance as identified in Section 3.2 of the North Andover Wetland, Regulations; and 2. A waiver to the No-Build Zone to the BVW to allow construction of the proposed building and parking areas. The site, its wetlands, and buffer zone have little value for habitat, nutrients, erosion control, and other interests of the Act. The upland areas within the buffer zone, and the IVW have been previously disturbed under a previous order of conditions issued for the Site. The work commenced with vegetation clearing, and removal of top soil,but never completed. This resulted in the site being over-run with opportunistic vegetation that has impaired the function of the buffer zone and wetlands. The Site has also been used for illicit dumping of trash such as Notice of Intent 189 Willow Street North Andover,MA Page 31 mattresses over the years. The Applicant has made significant efforts to remove this trash and debris. The Applicant is seeking to construct a 6,667 square foot office building with associated parking within the 50-foot NBZ and IVW, the upland area of the site is almost wholly located within this zone. Additionally, the Applicant is seeking to construct stormwater controls within the 25-foot NDZ and remove invasive and opportunistic vegetation in theses areas and installing replicated wetland areas therein. There is no feasible alternative to siting the work within the NBZ and NDZ. The Project has been designed consistent with previous approvals issued after the enactment of the Local By- Law. The Applicant is seeping to improve the Site through vegetation management, wetland replication, and a robust native landscaping plan. The NBZ and NDZ are choked with opportunistic vegetation and are functioning poorly or not functioning at all. The removal of this vegetation, replication and enhancement of wetland resource areas and planting of native species that provide habitat and forage value will result in an improvement to these buffers and the resource as a whole. The Project will result in the loss of 3,664 square feet local jurisdictional NW that has no significance under the North Andover Regulations as described above. Nevertheless, the Applicant is proposing 610 square feet of replicated IVW and an additional 4,438 square feet of replicated BVW at the Site resulting in a 1.4:1 replacement ratio. Summary The proposed Project consists of the construction of a proposed business office building, associated utilities,parking, driveways, and stormwater appurtenances. The Project proposes work within non-disturbance and no-build zones under local jurisdiction. The proposed Project has been designed in accordance with regulatory performance standards of resource areas under the Wetlands Protection Act. The Proponent respectfully requests that the North Andover Conservation Commission, as issuing authority under MGL c131 Sec. 40, find these measures adequately protect the interests identified in the Act and issue an Order of Conditions approving the work described in this Notice of Intent and shown on the accompanying plans. Notice of Intent 189 Willow Street North Andover,MA Page 32 Project Name: 189 Willow Street—Business Offices Owner's Name: Vincent J. Grasso 30 Faulkner Road North Andover, MA 01845 Applicant's Name: Same as above Party Responsible for Maintenance: To be determined Project Description: The Applicant proposes to construct a business office building, associated parking and driveways, site utilities and stormwater appurtenances at 189 Willow Street in North Andover, Massachusetts. Erosion and Sedimentation Control Measures During Construction Activities: Straw Wattles Straw Wattles are to be installed as shown on the Construction Plans. Wattles are to be installed prior to the commencement of work on the site and in accordance with the design plans. An additional supply of wattles shall be maintained on-site for repair and/or replacement of any disturbed wattles. The wattles line(s) shall be inspected and maintained on a weekly basis. Deposited sediment shall be removed when the level of deposition reaches approximately one-third(1/3)the height of the wattle. Storm Drain Inlet Protection A temporary storm inlet protection filter will be placed in all catch basin units. The purpose of the filter is to prevent the inflow of sediment into the closed drainage system(s). The filters shall remain in place until a permanent vegetative cover is established and the transport of sediment is no longer visibly apparent. The filter shall be inspected and maintained on a weekly basis and after significant storm events. Significant storm events are those having greater than one-quarter (1/4) inch of precipitation in a 24-hour period. Surface Stabilization The surface of all disturbed areas shall be stabilized during and after construction. Temporary measures shall be taken during construction to prevent erosion and sedimentation. No construction sediment shall be allowed to enter infiltration areas. All disturbed slopes shall be stabilized with a permanent vegetative cover. Some or all of the following measures can be used on the Project as conditions may warrant: • Temporary Seeding • Temporary Mulching Notice of Intent 189 Willow Street North Andover,MA Page 33 • Placement of Hay • Placement of Geo-Synthetic Fabrics • Hydroseeding • Permanent Seeding • Placement of Sod Surface and Subsurface Infiltration Facilities No construction period runoff should be directed toward infiltration facilities. The performance of these facilities shall be checked weekly and after significant storm events throughout construction. Notice of Intent 189 Willow Street North Andover,MA Page 34 INSPECTION SCHEDULE and EVALUATION CHECKLIST To be completed weekly and within 24-hours of significant rainfall events (greater than 1/4- inches in a 24-hour period). Inspector's Name: Date: Qualifications: Days since last rainfall: days Amount of last rainfall: inches Stabilization Measures Date of Last Date of Next Stabilized Sub-Catchment Disturbance Disturbance (Yes or No) Stabilized With: Condition Stabilization required: To be performed by: on or before: Notice of Intent 189 Willow Street North Andover,MA Page 35 PERIMETER CONTROLS Date of Inspection: Silt Fence and Hay Bales: Has sediment reached 1/3 Is there evidence height of silt Depth of Is fence of bypass or fence? Silt secure? overtopping?(Yes Describe location of Problem(s),if To Study Area: (Yes or No) (inches) (Yes or No) or No) any. DPI DP2 Maintenance required for silt fence and hay bales: To be performed by: on or before: Stabilized Construction Entrance: Does much sediment get Is all traffic using tracked onto the entrance to Is the culvert beneath the roadway? Is gravel clean or access/exit the site? entrance working?(Yes or Location (Yes or No) full of sediment? (Yes or No) No) Farm Ave Maintenance required for stabilized construction entrance: To be performed by: on or before: Notice of Intent 189 Willow Street North Andover,MA Page 36 Other Best Management Practices: Maintenance In use? Required?(Yes or BMP (Yes or No) No) Describe location of Problem(s),if any. Sweeping of Adjacent Roads Catch Basin Inlet Protection Swale 1 Swale 2 Maintenance required: To be performed by: on or before: I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. Signature: Date: Notice of Intent 189 Willow Street North Andover,MA Page 37 This Page Intentionally Left Blank Notice of Intent 189 Willow Street North Andover,MA Page 38 Appendix A: Previous Permits ➢ Order of Conditions ➢ Certificate of Compliance Notice of Intent 189 Willow Street North Andover,MA Page 39 Bk 11049 Po205 4r2293 01--30- 2009 &- 01 • 57p COVER SHEEN THIS IS THE FIRST PAGE OF THIS DOCUMENT DO NOT REMOVE GRANTOR� i i GRANTEE JV W �" U? ADDRESS OF PROPERTY CITY/TO "TYPE OF DOCUMENT MLC ASSIGNMENT TYPE DEED 6D MORTGAGE NOTICE TYPE DISCHARGE SUBORDINATION AFFIDAVIT CERT TYPE DEC OF HOMESTEAD UCC TYPE DEC OF TRU_SpT,, V OTHER J� DESCRIBE Essex North Registry of Deeds Robert F. Kelley, Register 354 Merrimack St. Suite 304 Lawrence, NU 01843 (978) 683-2745 txrcxnxr iasrrn�nnrinnria nnm Bk 11049 Pg 206 #2293 ATTEST: Tru C.og. ULIMassachusetts Department of Environmental Protec on.A .-.,,,,.. , , Bureau of Resource Protection - Wetlands DEP Ftle Number: WPA Form 5 -- Order of Conditions moW Clerk 242_1279 Massachusetts Wetlands Protection Act M.G.L. c..131°, §40' A. General Information Important: North Andover When filling From: 1.Conservation Commission out forms on the computer, 2. This issuance is for(check one): ® Order of Conditions ❑ Amended Order of Conditions use only the tab key'to 3. To: Applicant: move your cursor-do not Sudarshan Chatterjee use the return a.First Name b.Last Name c.Company key. 55 South Bradford Street d.Mailing Address North Andover MA. 01845 e.City/Town f.State g.Zip Code 4. Property.Owner(if different from applicant): Leonard Annaloro Holbrook Realty Trust a.First Name b.Last Name c.Company 79 Salem Street d.Mailing Address North Andover MA. 01845 e.Cityfrown f.State g.Zip Code 5. Project Location: Willow Street North Andover a.Street Address b.Cityrrown Map 25 Parcel 4 c.Assessors Map/Plat Number d.Parcel/Lot Number Latitude and Longitude, if known (note: electronic filers will click for GIS locator): e.Latitude f.Longitude 6. Property recorded at the Registry of Deeds for(attach additional information if more than one parcel): Essex North a. County b.Certificate(if registered land) 3911 183 c.Book d.Page 9/28/04 13 OS S 6 7. Dates: a.Date Notice of Intent Filed b.Datef Pubic bearing Closed c.Da of issuance a. Final-Approved Plans and Other Documents (attach additional plan or document references as needed):. Site Development Plans a.Plan Title CAQ Engineering Associates, Inc. Carlos A. Quintal, P. E. b.Prepared By c.Signed and Stamped by 9/24104, revised .3Lal k5 V=20' d.Final Revision Date I e.Scale f.Additional Plan or Document Title g.Date \ 9. Total WPA Fee Paid: $ 1, 582.50 a.Total Fee Paid b.State Fee Paid c.City/Town Fee Paid wpar0rm5.doc- rev.1211104 Page 1 of 9 �> Bk 11049 Pg 207 #2293 d 1 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands DEP File Number: WPA Form 5 --- Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 B. Findings i. Findings pursuant to the Massachusetts Wetlands Protection Act: Following the review of the above-referenced Notice of Intent and based on the information provided in this application and presented at the public hearing,this Commission finds that the areas in which work is proposed is significant to the following interests of the Wetlands Protection Act. Check all that apply:. a. ® Public Water Supply b. ❑ Land Containing Shellfish c. ® Prevention of Pollution d. ® Private Water Supply e. ❑ Fisheries f. ® Protection of Wildlife Habitat g. ® Groundwater Supply h. ® Storm Damage Prevention i. ® Flood Control 2. This Commission hereby finds the project,as proposed, is:(check one of the fallowing boxes) Approved subject to: ® the following conditions which are necessary in accordance with the performance standards set forth in the wetlands regulations. This Commission orders that all work shall be performed in accordance with the Notice of Intent referenced above, the following General Conditions, and any other special conditions attached to this Order. To the extent that the following conditions modify or differ from.the plans, specifications, or other proposals submitted with the Notice of Intent, these conditions shall control. Denied because: ❑ the proposed work cannot be conditioned to meet the performance standards set forth in the wetland regulations. Therefore, work on this project may not go forward unless and until a new Notice of Intent is submitted which provides measures which are adequate to protect these interests, and a final Order of Conditions is issued. A'description of the performance standards which the proposed work cannot meet is attached to this Order. ❑ the information submitted by the applicant is not sufficient to describe the site, the work, or the effect of the work on the interests identified in the Wetlands Protection Act. Therefore, work on this project may not go forward unless and until a revised Notice of Intent is submitted which provides sufficient information and includes measures which are adequate to protect the Act's interests, and a final Order of Conditions is issued. A description of the specific information which is lacking and why it is necessary is attached to this Order as per 310 CMR 10.05(6)(c). Inland Resource Area Impacts: Check all that apply below. (For Approvals Only) Resource Area Proposed Permitted Proposed Permitted Alteration Alteration .Replacement Replacement 3. ❑ Bank a.linear feet b.linear feet c.linear feet d.linear feet 4. ❑ Bordering Vegetated Wetland a.square feet b.square feet c.square feet d.square feet 5. ❑ Land Under a.square feet b.square feet c.square feet d.square feet Waterbodies and Waterways e.cu.yd dredged f.cu.yd dredged apaforrn5,doo• ray.1211104 Page 2 of 9 Bk 11049 Pg 208 #2293 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands D1=P File Number: WPA Form 5 - order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 B. Findings (coat.) Resource Area Proposed Permitted Proposed Permitted Alteration Alteration Replacement Replacement 6. ❑ Bordering Land Subject to Flooding a.square feet b.square feet c.square feet d.square feet Cubic Feet Flood Storage e.cubic feet f.cubic feet g.cubic feet h.cubic feet 7. ❑ Isolated Land Subject to Flooding a.square feet b.square feet Cubic Feet Flood Storage c.cubic feet d.cubic feet e.cubic feet f.cubic feet 8. ❑ Riverfront area a.total sq.feet b.total sq.feet Sq ft within 100 ft c.square feet d.square feet Sq ft between 100-200 ft e.square feet f.square feet Coastal Resource Area Impacts. Check all that apply below. (For Approvals Only) 9. ❑ Designated Port Indicate size under Land Under the Ocean, below Areas 1o. ❑ Land Under the Ocean a.square feet b.square feet c..cu.yd dredged d.cu.yd dredged 11. ❑ Barrier Beaches . Indicate size under Coastal Beaches and/or Coastal Dunes below 12. ❑ Coastal Beaches a.square feet b.square feet c.cfy nourishmt. d, cly nourishrt. 13, ❑ Coastal Dunes a.square feet b.square feet c.cly nourishmt. d.c/y nourishmt 14. ❑ Coastal Banks a. linear feet b.linear feet 15. ❑ Rocky Intertidal Shores a.square feet b.square feet 16. ❑ Salt Marshes a.square feet b.square feet c.square feet d.square feet 17. ❑ Land Under Salt Ponds a.square feet b.square feet c.cu.yd dredged d.cu.yd dredged 18. ❑ Land Containing Shellfish a.square feet b.square feet c.square feet d.square feet 19. ❑ Fish Runs Indicate size under Coastal Banks, inland Bank, Land Under the Ocean, and/or inland Land Under Waterbodies and Waterways, above a.cu.yd dredged b.cu.yd dredged 20. ❑ Land Subject to Coastal Storm Flowage a.square feet b.square feet wpoform5.doc• rev.1211104 Page 3 of 9 Bk 11049 Pg 209 #2293 ILIMassachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands DEP File Number: WPA Form 5 - Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 C. General Conditions Under Massachusetts Wetlands Protection Act (only applicable to approved projects) 1. Failure to comply with all conditions stated herein, and with all related statutes and other regulatory measures, shall be deemed cause to revoke or modify this Order. 2. The Order does not grant any property rights or any exclusive privileges; it does not authorize any injury to private property or invasion of private rights. 3. This Order does not relieve the permittee or any other person of the necessity of complying with all other applicable federal, state, or local statutes, ordinances, bylaws, or regulations. 4. The work authorized hereunder shall be completed within three years from the date of this Order unless either of the following apply: a. the work is a maintenance dredging project as provided for in the Act; or b. the time for completion has been extended to a specified date more than three years, but less than five years, from the date of issuance. If this Order is intended to be valid for more than three years, the extension date and the special circumstances warranting the extended time period are set forth as a special condition in this Order. 5. This Order may be extended by the issuing authority for one or more periods of up to three years each upon application to the issuing authority at least 30 days prior to the expiration date of the Order. 6. Any fill used in connection with this project shall be clean fill.Any fill shall contain no trash, refuse, rubbish, or debris, including but not limited to lumber, bricks, plaster, wire, lath, paper, cardboard, pipe, tires, ashes, refrigerators, motor vehicles, or parts of any of the foregoing. 7. This Order is not final until all administrative appeal periods from this Order have elapsed, or if such an appeal has been taken, until all proceedings before the Department have been completed. 8. No work shall be undertaken until the Order has become final and then has been recorded in the Registry of Deeds or the Land Court for the district in which the land is located, within the chain of title of the affected property. In the case of recorded land, the Final Order shall also be noted in the Registry's Grantor index under the name of the owner of the land upon which the proposed work is to be done. In the case of the registered land, the Final Order shall also be noted on the Land Court Certificate of Title of the owner of the land upon which the proposed work is done. The recording information shall be submitted to this Conservation Commission on the form at the end of this Order, which form must be stamped by the Registry of Deeds, prior to the commencement of work. . 9. A sign shall be displayed at the site not less then two square feet or more than three square feet in size bearing the words, "Massachusetts Department of Environmental Protection" [or, "MA DEP"] "File Number 242-1279 " wpaformS.doc• rev.121VO4 Page 4 of 9 " Bk 11049 Pg 210 #2293 L7,� Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands bEP File Number: JWPA Form 5 - Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 C. General Conditions Under Massachusetts Wetlands Protection Act 10. Where the Department of Environmental Protection is requested to issue a Superseding Order, the Conservation Commission shall be a party to all agency proceedings and hearings before DEP. 11. Upon completion of the worm described herein, the applicant shall submit a Request for Certificate of Compliance (WPA Form 8A)to the Conservation Commission. 12. The work shall conform to the plans and special conditions referenced in this order. 13. Any change to the plans identified in Condition#12 above shall require the applicant to inquire of the Conservation Commission in writing whether the change is significant enough to require the filing of a new Notice of Intent. 14. The Agent or members of the Conservation Commission and the Department of Environmental Protection small have the right to enter and inspect the area subject to this Order at reasonable hours to evaluate compliance with the conditions stated in this Order, and may require the submittal of any data deemed necessary by the Conservation Commission or Department for that evaluation. 15. This Order of Conditions shall apply to any successor in interest or successor in control of the property subject to this Order and to any contractor or other person performing work conditioned by this Order. 16. Prior to the start of work, and if the project involves work adjacent to a Bordering Vegetated Wetland, the boundary of the wetland in the vicinity of the proposed work area shall be marked by wooden stakes or flagging. Once in place, the wetland boundary markers shall be maintained until a Certificate of Compliance has been issued by the Conservation Commission, 17. All sedimentation barriers shall be maintained in good repair until all disturbed areas have been fully stabilized with vegetation or other means: At no time shall sediments be deposited in a wetland or water body. During construction, the applicant or his/her designee shall inspect the erosion controls on a daily basis and shall remove accumulated sediments as needed. The applicant shall immediately control any erosion problems that occur at the site and shall also immediately notify the Conservation Commission,which reserves the right to require additional erosion and/or damage prevention controls it may deem necessary. Sedimentation barriers shall serve as the limit of work unless another limit of work line has been approved by this Order. Special Conditions: If you need more See attached space for additional conditions, select box to attach a text document wpaform5.doe• rav,1211104 Page 5 of 9 Bk 11049 Pg 211 #2293 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands DEP File Number: 7� I WPA Form 5 - Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 D. Findings Under Municipal Wetlands Bylaw or Ordinance 1. Furthermore, the North Andover hereby finds(check one that applies): Conservation Commission 2. ❑ that the proposed work cannot be conditioned to meet the standards set forth in a municipal ordinance or bylaw specifically: a.Municipal Ordinance or Bylaw b.Citation Therefore, work on this project may not go forward unless and until a revised Notice of Intent is submitted which provides measures which are adequate to meet these standards, and a final Order of. Conditions is issued. 3. ® that the following additional conditions are necessary to comply with a municipal ordinance or bylaw: North Andover Wetland Protection Bylaw Chapter 178 a.Municipal Ordinance or Bylaw b.Citation The Commission orders that all work shall be performed in accordance with the following conditions and with the Notice of Intent referenced above. To the extent that the following conditions modify or differ from the plans, specifications, or other proposals submitted with the Notice of Intent, the conditions shall control. If you need more c. The special conditions relating to municipal ordinance or law are as follows: space for p g p Y additional See Attached conditions, select box to attach a text document wpaform5.doc• rev,1211104 Page 6 of 9 ". Bk 11049 Pg 212 #2293 DEP FILE#242 - 1279 Therefore, the North Andover Conservation Commission(hereafter the "NACC") hereby finds that the following conditions are necessary, in accordance with the Performance Standards set forth in the State Regulations,the local Bylaw and Regulations,to protect those interests noted above. The NACC orders that all work shall be performed in accordance with said conditions and with the Notice of Intent referenced below. To the extent that the following conditions modify or differ from the plans, s ecifications or other 12roRosals submitted with the Notice of Intent the conditions shall control. GENERAL CONDITIONS 18. Failure to comply with all conditions stated herein, and with all related statutes and other regulatory measures, shall be deemed cause to revoke or modify this Order. 19. This Order does not grant any property rights or any exclusive privileges;it does not authorize any injury to private property or invasion of property rights. However, the NACC,agent of the NACC or the Department of Environmental Protection (DEP) reserves the right to enter and inspect the property at all reasonable times until a Certificate of Compliance is issued,to evaluate compliance with this Order of Conditions, the Act(310 CMR 10.00), the North Andover Wetland Bylaw and Regulations, and may require any information, measurements, photographs, observations,and/or materials,or may require the submittal of any data or information deemed necessary by.the NACC for that evaluation. Further, work shall be halted on the site if the NACC, agent or DEP determines that any of the work is not in compliance with this Order of Conditions. Work shall not resume until the NACC is satisfied that the work will comply and has so notified the applicant in writing. 20. This Order does not relieve the permittee or any other person of the necessity of complying with all-other applicable federal,state or local statutes, ordinances, by-laws or regulations. 21. The work authorized hereunder shall be completed within three years from the date of this order. 22. This Order may be extended by the issuing authority for one or more periods of up to one year each upon application to the issuing authority at least thirty days (30) prior to the expiration date of the Order (Refer to Section 8.3 (p.37) of the North Andover Wetland ReguIations). 23. The NACC reserves the right to amend this Order of Conditions after a legally advertised public hearing if plans or circumstances are changed or if new conditions or information so warrant. C:IWinword1000\WiI1owSt.doc 1 NACC 5/3/05 Bk 11049 Pg 213 #2293 DEP FILE#242 - 1279 24. Where the Department of Environmental Protection (DEP) is requested to make a determination and to issue a Superseding Order,the Conservation Conunission shall be a party to all agency proceedings and hearings before the Department. 25. This Order of Conditions is issued under File No. 242-1279. 26. The conditions of this decision shall apply to, and be binding upon, the applicant, owner, its employees and all successors and assigns in interest or control. These obligations shall be expressed in covenants in all deeds to succeeding owners of portions of the property. 27. The term"Applicant" as used in this Order of Conditions shall refer to the owner, any successor in interest or successor in control of the property referenced in the Notice of Intent, documents and this Order of Conditions. The NACC shall be notified in writing within 30 days of all transfers of title of any portion of property that takes place prior to the issuance of a Certificate of Compliance. 28.The proposed work includes: The construction of a 7,200 s.f two story commercial office . building with associated grading, parking,utilities and stormwater management systems within a bordering vegetated wetland (for access purposes) and associated buffer zones. Proposed work also includes a 609-s.f-wetland replication area (2:1 mitigation as required in the Wetlands.Bylaw regulations). . 29. The work shall conform to the following (except as noted in the remainder of this document where revisions may be required): Notice of Intent filed by: Dr. Sudarshan Chatterjee(Applicant) 55 South Bradford Street North Andover,MA 01845 Entitled"Technical Supplement- Site Plan Application- Notice of Intent" Dated 9/27/04; Revised 1/27/05 Site Plans and NOI Prepared by: CAQ Engineering Associates,Inc. 236 Pleasant Street, Suite 22 Methuen, MA 01844 Plans Entitled: "Site Development Plans for Willow Street.- Map 25 Parcel 4 North Andover, Massachusetts". Dated September 24,2004; Revised 11/8/08,1/27/05,2/15/05, &3/21/05. Signed & Stamped by Carlos A. Quintal,P.E. Wetland Replication Report Prepared by: Basbanes Associates Wetlands Consulting 39 Hardy Street Dunstable, MA 01827 CAWinword\00CIWi11owSt.doc 2 NACC 5/3/05 Bk 11049 Pg 214 #2293 DEP FILE#242 - 1279 Entitled "Wetland Replication PIan"' dated November 16, 2004,revised 2/18/05. Operation&Maintenance Plan Prepared by: CAQ Engineering Associates, Inc. 236 Pleasant Street, Suite 22 Methuen,MA 01844, Received date 3/23/05 Other Record Documents: Technical Review Letter prepared by Eggleston Environmental, dated December 21,2004, Response Letter prepared by CAQ Engineering Associates, Inc., dated January 27,2005; Technical Review Letter prepared by Eggleston Environmental, dated February 9,2005; Response Letter prepared by CAQ Engineering Associates, Inc.,dated February 22,2005, Technical Review Letter prepared by Eggleston Environmental, dated March 9,2005; Response Letter prepared by CAQ Engineering Associates, Inc.,dated March 21,2005; Technical Review Letter prepared by Eggleston Environmental, dated April 12,2005. 30. The following wetland resource areas are affected by the proposed work: Buffer Zone to Bordering Vegetated Wetland(BVW) and Bordering Vegetated Wetland (Limited Project-239 s.f. of disturbance).These resource areas are significant to the interests of . the Act and Town ByLaw as noted above and therein. The applicant has not attempted to overcome the presumption of significance of these resource areas to the identified interests. 31. The NACC agrees with the applicant's delineation of the wetland resource areas on the site as shown on the plans dated referenced herein. The delineation was approved under an GRAD (242-1235) issued on 1/29/04. 32. The NACC finds that the intensive use of the upland areas and buffer zone proposed on this site will cause further alteration of the wetland resource areas. In order to prevent any alteration of wetland resource areas a twenty five foot (25') No-Disturbance Zone and a fifty foot (50') No-Construction Zone shall be established from the edge of the adjacent wetland resource area except in those locations as shown on the approved plan referenced herein for the access drive and culvert crossing. The Conservation Administrator and/or other agents of the NACC do not have the authority to waive these CAWinwordloOC\WillowSt.doc 3 NACC 513105 Bk 11049 Pg 215 #2293 DEP FILE #242- 1279 setbacks as established under the local bylaw. No disturbance of existing grade,soils or vegetation is permitted in the No-Disturbance zone. (See Section 3.4 &Appendix F of the local Regulations). 33. This document shall be included in all construction contracts, subcontracts, and specifications dealing with the work proposed and shall supersede any conflicting contract requirements. The applicant shall assure that all contractors, subcontractors, and other personnel performing the permitting work are fully aware of the permits terms and conditions. Thereafter, the contractor will be held jointly liable for any violation of this Order resulting from failure to comply with its conditions. 34. The owners of the project and their successors in title, in the event they proceed to alter areas subject to the Commission's jurisdiction under the order, agree that the Order does not in itself impose upon the Town any responsibility to maintain the proposed drainage system and that said Town shall not be liable for any damage in the event of failure. By acceptance of this Order, the owners agree to indemnify and hold harmless to the Town and its residents for any damage attributable to alterations undertaken on this property pursuant to the Order. Issuance of these Conditions does not an any way imply or certify that the site or downstream areas will not be subject to flooding, storm damage or any other form of water damage. Maintenance of the drainage system, if accepted by the Town as part of a public way, becomes the responsibility of the Town. 35.The NACC finds the applicant's proposal for 609 sq.ft. of wetland replication to be adequate. The replication areas shall be constructed prior to other construction activity on site and this sequence shall be reflected in the construction sequence. (Refer to Section 8.3 (p.37) of the IocaI Regulations for performance standards). The replication area shall be planted in accordance with the Wetland Replication Plan referenced herein by a qualified wetland specialist. Construction activities shall not occur on the site until the NACC has reviewed and approved the completed wetland replication area. 36. Issuance of these Conditions does not in any way imply or certify that the site or downstream areas will not be subject to flooding, storm damage or any other form of water damage. PRIOR TO CONSTRUCTION 37. No work shall be undertaken until all administrative appeal periods from this Order have elapsed or, if such an appeal has been filed, until all proceedings before the Department or Court have been completed. 38. This Order shall be recorded by the applicant at the Registry of Deeds immediately after the expiration of all appeal periods. No work shall be undertaken until the Final Order has been recorded in the Registry of Deeds or the Land Court for the district in which the land is located, within the chain of title of the affected property. In the case of recorded C:1Winword100CIWiIIowSt.doc 4 NACC 5/3105 y Bk 11049 Pg 216 #2293 DEP FILE #242 - 1279 Iand,the Final Order shall also be noted in the Registry's Grantor Index under the name of the owner of the land upon which the proposed work is to be done. In the case of registered land; the Final Order shall also be noted on the Land Court Certificate of Title of the owner of the land upon which the proposed work is to be done. The recording information shall be submitted to the North Andover Conservation Commission on the form at the end of this Order prior to commencement of the work. Any Order not recorded by the applicant before work commences may be recorded by the NACC at the applicant's expense. 39. A sign shall be displayed at the site not less than two square feet or more than three square feet in size bearing the words "Massachusetts DEP,File Number 242-1279." 40. Any changes in the submitted plans caused by the applicant, another Board's decision or resulting from this Order of Conditions must be submitted to the NACC for approval prior to implementation. If the NACC finds said changes to be significant, the NACC will call for another public hearing(at the expense of the applicant). Within 21 days of the close of said public hearing the NACC will issue an amended or new Order of Conditions. Any errors found in the plans or information submitted by the applicant shall be considered as changes. The proposed project may be still under review by other local or state boards or agencies. This may result in changes to the project plans or wetland impacts. If any such changes occur a revised plan and an explanation of the revisions shall be submitted to the NACC for review and approval prior to the start of construction. No work shall begin on a project until written approval has been granted by the NACC. 41. It is the responsibility of the applicant, owner, and/or successor(s) to ensure that all conditions of this Order of Conditions are complied with. The project engineer and contractors are to be provided with a copy of this Order of Conditions and referenced documents before commencement of construction. 42. IMPORTANT-Prior to any work commencing on-site,the applicant shall submit to the NACC for approval, a detailed sequence of construction,including the construction of compensation and retention areas,installation of sedimentation/erosion control devices and re-vegetation to be completed before other work begins on-site. 43. Wetland flagging shall be checked prior to start of construction and shall.be re-established. where missing. All wetland flagging shall remain visible and enumerated per the approved plan(s) throughout the life of the project and until a Certificate of Compliance is issued so that erosion control measures can be properly placed and wetland impacts can be monitored. The proposed limit of work shall be shall be clearly marked with stakes or flags and shall be confirmed by the NACC. Such markers shall be checked and replaced as necessary and shall be maintained until all construction is complete. Workers should be informed that no use of machinery, storage of machinery or materials, stockpiling of soil, or construction activity is to occur beyond this line at any time. All flags used for the above purposes shall be of a color different:from other flagging used on the site. C:1Winword100C\Wi11owSt.doc 5 NACC 513/05 Bk 11049 Pg 217 #2293 DEP FILE #242 - 1279 44. Prior to the commencement of any work on site,a Registered Land Surveyor (R.L.S.) shall stake the foundation corners of the proposed building to verify that the 50-foot No-Build setback will be adhered to. The Conservation agent shall verify these measurements during the pre-construction meeting. 45. A row of staked hay bales backed by trenched siltation fence shall be placed between all construction areas and wetlands. The erosion control barrier will be properly installed and placed as shown on the plans approved and referenced herein and shall be inspected and approved by the NACC prior to the start of construction and shall remain intact until all disturbed areas have been permanently stabilized to prevent erosion. All erosion prevention and sedimentation protection measures found necessary during construction shall be implemented at the direction of the NACC. The NACC reserves the right to impose additional conditions on portions of this project to mitigate any impacts which could result from site erosion, or any noticeable degradation of surface water quality discharging from the site. For example, installation of erosion control measures may be required in areas not shown on the plan(s) referenced in this Order of Conditions. Should such installation be required by the NACC, they shall be installed within 48 hours of the .Commissions request. 46. The applicant shall have on hand at the start of any soil disturbance,removal or stockpiling, a minimum of 50 hay bales and sufficient stakes for staking these bales (or an equivalent amount of silt fence). Said bales shall be used only for the control of emergency erosion problems and shall not be used for the normal control of erosion. 47. A check payable to the Town of North Andover shall be provided in the amount of $10,000,which shall be in all respects satisfactory to Town Counsel, Town Treasurer, and the NACC, and shall be posted with the North Andover Town Treasurer through the NACC before commencement of work. Said deposit of money shall be conditioned on the completion of all conditions hereof, shall be signed by a party or parties satisfactory to the NACC, and Town Counsel, and shall be released after completion of the project, provided that provisions, satisfactory to the NACC, have been made for performance of any conditions which are of continuing nature. The applicant may propose a monetary release schedule keyed to completion of specific portions of the project for the NACC's review and approval. This condition is issued under the authority of the local Bylaw. 48. The applicant shall designate a Wetland Scientist as an"Erosion Control Monitor" to oversee any emergency placement of controls and regular inspection or replacement of sedimentation control devices. The name and phone number of the erosion control monitor must be provided to the NACC in the event that this person has to be contacted, due to an emergency at the site, during any 24-hour period, including weekends. Proof of the retained monitor must be submitted to the Conservation Department on letterhead by the retained consulting firm. This person shall be given the authority to stop construction for erosion control purposes.The erosion control monitor will be required to inspect all such devices and oversee cleaning and the proper disposal of waste products. Cleaning shall include removal of any entrapped silt. At least once during CAWinword100CIWiilowSt.doc 6 NACC 513105 Bk 11049 Pg 218 #2293 DEP FILE#242 - 1279 each week in which construction activities occurs on-site and for as long thereafter as ground remains unstabilized,the applicant shall submit a written report from the "Erosion Control Monitor" to the NACC certifying that, to the best of his/her knowledge and belief based on a careful site inspection, all work is being performed in compliance with this Order of Conditions and that approved setbacks are being adhered to. The erosion control monitor must visually inspect all sedimentation/erosion control measures and assume responsibility for their maintenance on a weekly basis and that they are functioning as intended. In addition, all wetland resource areas must be visually inspected for siltation, turbidity,and/or other water quality impacts. 49. The project is subject to NPDES permit compliance and will require a Construction Stormwater Pollution Prevention Plan (SWPPP). A final copy of this SWPPP shall be submitted to the Conservation Department for review prior to construction activities. 50. The applicant and/or the legal owner of that portion of land upon which these Orders of Conditions have been placed shall provide to the NACC prior to transferring,or assigning any portion of said land to another party,subject to said Orders.of Conditions,the "Compliance Certification Form Affidavit" attached via "Appendix A" signed under the pains and penalties of perjury, stating that said applicant and/or owner has read these Orders of Conditions and is in compliance with each and every condition. This document shall apply to each of the conditions referenced herein and shall be provided to the Conservation Department at least five (5) business days after to the closing of said land transaction. 51. Once these above mentioned pre-construction requirements are complete,the applicant shall contact the Conservation Office prior to site preparation or construction and shall arrange an on-site conference with an NACC representative,the contractor,the engineer,wetland scientist and the applicant to ensure that all of the Conditions of this Order are understood. This Order shall be included in all construction contracts, subcontracts, and specifications dealing with the work proposed and shall supersede any conflicting contract requirements. The applicant shall assure that all contractors, subcontractors and other personnel performing the permitted work are fully aware of the permit's terms and conditions. Thereafter, the contractor will be held jointly liable for any violation of this Order of Conditions resulting from failure to comply with its conditions. The applicant or contractor shall notify the NACC in writing of the identity of the on-site construction supervisor hired to coordinate construction and to ensure compliance with this Order. A reasonable period of time shall be provided as notice of the pre- construction meeting(e.g. 72 hours). STORMWATER MANAGEMENT CONDITIONS 52. All construction and post-construction stormwater management shall be conducted in accordance with supporting documents and plans submitted with the Notice of Intent, the C:Mnword1000Wi11ow5t.doc 7 NACC 5/3/05 Bk 11049 Pg 219 #2293 DEP FILE#242 - 1279 Department of Environmental Protection Stormwater Management Policy and as approved by the NACC in this Order of Conditions. 53. All stormwater best management practices shall be maintained as specified in the Operation and Maintenance Plan submitted with the Notice of Intent and incorporated in the Order of Conditions. Evidence of maintenance of the stormwater management system shall be provided to the NACC on an annual basis by a Registered Professional Civil Engineer. The first report shall be submitted to the NACC one year after the first stormwater structure goes on-line and annual reports must continue to be submitted until the issuance of a Certificate of Compliance. Compliance of the system with the design basis and the Order of Conditions shall be certified by a Registered Professional Engineer to the Conservation Commission or its Agent prior to the issuance of a Certificate of Compliance. 54. There shall be no increase in the post development discharges from the storm drainage system or any other changes in post development conditions that alter the post development watershed boundaries as currently depicted in the Notice of Intent and approved by this Order of Conditions,unless specifically approved in writing by the Commission. 55. Water quality, down gradient of BVWs shall not differ significantly following completion of the project from the pre-development conditions. There shall be no sedimentation into wetlands or water bodies from discharge pipes or surface runoff leaving the site. 56. The applicants, owners, and their successors and assignees, shall maintain all culverts, collections basins, traps, outlet structures, subsurface storage areas, and other elements of the drainage system, unless put into an easement to the Town of North Andover, in order to avoid blockages and siltation which might cause failure of the system and/or detrimental impacts to on-site or off-site resource areas, and shall maintain the integrity of vegetative cover on the site. 57. Immediately upon the installation of the catch basin(s),silt sacks or equivalent to, shall be installed under the grates to prevent/restrict sediment from entering the drainage system or adjacent wetlands. Silt sacks shall be cleaned after any rainfall event of V or greater or as directed by the Erosion Control Monitor, Site Supervisor,Project Manager,or Conservation staff. DURING CONSTRUCTION 58. IMPORTANT: Immediately upon completion of the dwelling foundation, and prior to further construction activities associated with the site,the applicant shall complete a plan prepared by a Registered Professional Land Surveyor of the Commonwealth (R.P.L.S.) which accurately depicts the foundation location and it's proximity to wetland resource areas as approved under this Order of Conditions. Said plan shall be submitted to the Conservation Administrator for approval. CAWinword100CIWi11owSt.doc 8 NACC 5/3/05 Bk 11049 Pg 220 #2293 DEP FILE#242 - 1279 59. The contractor will take all steps necessary to control dust onsite so that adverse effects on adjacent resource areas and / or habitat do not occur. 60. Upon beginning work, the applicant shall submit written progress reports every month detailing what work has been done in or near resource areas, and what work is anticipated to be done over the next period. This will update the construction sequence. 61..The Erosion Control Monitor shall be on site at all times during the wetland crossing for the construction of the access drive and installation of the box culvert. Erosion controls shall be installed and/or reinforced in this location on a daily basis to prevent sediment migration to the adjacent resource area or to the nearby inlet structures (catch basins). . 62. The Erosion Control Monitor shall be on site during and/or following a major storm event of 1 inch of rain or greater to ensure that soils remain stable,erosion controls are adequate and secure,and that all BMP's are adequately functioning. 63. A crushed stone construction entrance shall be installed to minimize soil/material tracking onto Willow Street. This entrance shall be reinforced as necessary. 64.Willow Street shall be swept at least once per week or as directed by the Erosion Control monitor,the Site Supervisor,Project Manager,or the Conservation staff for as long as the site remains exposed and unstable. 65. At the end of each growing season, a progress report of the relative success or failure of the replication effort shall be conducted by a biologist,botanist, or wetlands specialist and submitted to the Department of Environmental Protection (DEP) and the North Andover Conservation Commission for review and approval. If at the end of the second growing season, compliance with 310.CMR 10.55 (4)(b)(6) is not achieved, the NACC maintains the right to require additional mitigative measures. 66. All catch basins shall contain oil/gasoline traps, and it shall be a continuing condition of this order, even after a Certificate of Compliance is issued, that the oil/gasoline traps in the catch basins be maintained. All catch basins shall be free of all accumulated silt and debris before Compliance is issued and the owner or his/her agent shall so specify in the request for Compliance. 67. The sewer lines on the site, where they cross wetland resource areas,shall be tested for water tightness in accordance with North Andover DPW standards. 68. Approved de-watering activities anticipated shall be supervised and witnessed by the designated erosion control monitor. This designee must be on-site while dewatering is occurring. De-watering activities shall be conducted as shown on the approved plans and shall be monitored daily by the erosion control monitor to ensure that sediment laden water is appropriately settled prior to discharge toward the wetland resource areas. No discharge of water is allowed directly into an area subject to jurisdiction of the Wetlands Protection Act and/or the North Andover Wetland Bylaw, If emergency de-watering requirements CAWinword100CIWi11owSt.doc 9 NACC 513105 " Bk 11049 Pg 221 #2293 DEP FILE #242 - 1.279 arise, the applicant shall submit a contingency plan to the Commission for approval,which provides for the pumped water to be contained in a settling basin, to reduce turbidity prior to discharge into a resource area. 69. Any fill used in connection with this project shall be clean fill, containing no trash, refuse, rubbish or debris, including but not limited to lumber,bricks, plaster,wire, lathy paper, cardboard, pipe, tires, ashes, refrigerators,motor vehicles or parts on any of the foregoing. 70. No exposed area shall remain unfinished for more than thirty (30) days,unless approved by the NACC. 71. No re-grading in the buffer zone shall have a slope steeper than 2:1 (horizontal: vertical). Slopes of steeper grade shall be rip-rapped to provide permanent stabilization. 72. There shall be no stockpiling of soil or other materials within twenty-five (25) feet of any resource area. 73. Washings from concrete trucks, or surplus concrete, shall not be directed to, any drainage system, or wetland resource area. 74. All waste generated by, or associated with, the construction activity shall be contained within the construction area,and away from any wetland resource area. There shall be no burying of spent construction materials or disposal of waste on the site by any other means. The applicant shall maintain dumpsters (or other suitable means) at the site for the storage and removal of such spent construction materials off-site. However, no trash dumpsters will be allowed within 50' of areas subject to protection under the Act or local Bylaw. 75. Accepted engineering and construction standards and procedures shall be followed in the completion of the project. 76. During and after work on this project,there shall be no discharge or spillage of fuel, or other pollutants into any wetland resource area. If there is a spill or discharge of any pollutant during any phase of construction the NACC shall be notified by the applicant within one (1) business day. No construction vehicles are to be stored within 100 feet of wetland resource areas, and no vehicle refueling, equipment lubrication, or maintenance is to be done within 100 feet of a resource area. AFTER CONSTRUCTION 77. No underground storage of fuel oils shall be allowed on any lot within one hundred (100) feet of any wetland resource area. This condition shall survive this Order of Conditions and shall run with the title of the property. This condition is issued under the authority of the Town's Wetland protection Bylaw. CAWinword100C\Wi11owSt.doc 10 NACC 5/3/05 Bk 11049 Pg 222 #2293 • e DEP FILE#242 - 1279 78. Fertilizers utilized for landscaping and lawn care shall be slow release, low-nitrogen types (< 5%), and shall not be used within 25 feet of a resource area. Pesticides and herbicides shall not be used within 100 feet of a wetland resource area. This condition shall survive this Order of Conditions and shall run with the title of the property. This condition is issued under the authority of the Town's Wetland Protection Bylaw and shall remain in perpetuity. 79. No road salt, sodium chloride, or other de--icing chemicals shall be used on paved surfaces, and all snow shall.be removed from site in perpetuity as referenced in the Operation &Maintenance Plan attached herein. Permanent signs designating"No-Salt Zone" and "No-Snow Stockpiling" shall be displayed in prominent locations throughout the site. 80. Prior to the issuance of a certificate of compliance,the applicant or legally transferred property owner, shall submit a final snow removal plan and contractual snow removal agreement to the Conservation Department for review and approval. This agreement shall also specify the procedures for perpetual snow removal on the site should ownership and/or the designated contracts change. 81.Prior to the issuance of a certificate of compliance,the applicant or legally transferred property owner, shall provide written documentation to the Conservation Department and the Department of Public Works (DPW) indicating-that a deed restriction will be placed on. the property relative to the proposed box culvert to state that any and all future maintenance and/or repairs to the culvert be the responsibility of the property owner(s) in perpetuity. 82.Upon completion of work, the applicant shall permanently mark the edge of wetland resource areas and the "No-Disturbance Zone" with twelve (12) signs or markers spaced evenly every 50 Feet designating their sensitivity. This will ensure no further inadvertent encroachment into the wetland. These permanent markers are subject.to review and approval by the NACC. The applicant shall instruct all agents to explain these markers to buyers/lessees/landscapers and all persons taking over the property from the applicant. 83. Upon completion of construction and grading, all disturbed areas located outside resource areas shall be stabilized permanently against erosion. This shall be done either by loaming and seeding according to SCS standards. if the latter course is chosen,stabilization will be considered complete once vegetative cover has been achieved. 84. The Operation &Maintenance Plan is fully binding upon the applicant, and or owners, successors, agents, associations,heirs,and assigns and must be adhered to in perpetuity. The North Andover Conservation Commission must be notified upon creation of associations or agencies responsible for the perpetual implementation of the Operation & Maintenance Plan. 85. Upon approved site stabilization by Conservation staff,the erosion controls shall be removed and properly disposed of and all exposed unvegetated areas shall be seeded. C:1Winword100CIWi11owSt.doe 11 NACC 5/3/05 Bk 11049 Pg 223 #2293 DEP FILE#242 - 1279 86. Upon completion of the project the applicant shall submit the following to the Conservation Commission as part of a request for a Certificate of Compliance: a. WPA Form 8A-"Request for a Certificate of Compliance." b. A letter from the applicant requesting a Certificate of Compliance. c. The name and address of the current landowner. d. Signed statements from the individual property owners shall be submitted with the request for a Certificate of Compliance indicating that they read and understood the recorded Order of Conditions prior to purchasing their property. e. The name and address of the individual/trust or corporation to whom the compliance is to be granted. f. The street address and assessor's map/parcel number for the project. g. The DEP file number. h. A written statement from a Registered Professional Civil Engineer (and/or Registered Professional Land Surveyor) of the Commonwealth certifying that the work has been conducted as shown on the plan(s) and documents referenced above, and as conditioned by the Commission. i. A written statement from a Professional Wetland Scientist certifying that the wetland replication areas are functioning as'intended by this Order of Conditions and in compliance with the local wetland protection bylaw and regulations for at least two full growing seasons. j. An"As-Built" plan prepared and signed and stamped by a Registered Professional Civil Engineer (and/or Registered Professional Land Surveyor) of the Commonwealth,for the public record. This plan will :include: ➢ "As-Built" post-development elevations of all drainage &stormwater management structures constructed within 100 feet of any wetland resource area. NOTE: If portions of the stormwater systems exist partially within the Buffer Zone than the entire structure must be depicted to accurately verify compliance. ➢ "As-Built" post-development elevations and grades of all filled or altered wetland resource areas including the encompassing buffer zone,which is regulated as a resource area under the local Wetland Protection Bylaw. ➢ Distances from structures to wetland resource areas. Structures include (but are not limited to) septic systems, additions,fences, sheds, stone walls, pools,retaining walls, subsurface utilities and decks. ➢ A line showing the limit of work and the extent of existing erosion control devices. "Work" includes anv disturbance of soils or vegetation. ➢ Location of all subsurface utilities entering the property. CAWinwordloOClWiliowSt.doc 12 NACC 5/3/05 Bk 11049 Pg 224 #2293 DEP FILE #242- 1.279 87. The following special conditions shall survive the issuance of a Certificate of Compliance (COC) for this project: ➢ 25' No-Disturbance Zone and a 50' No-Construction Zone shall be established from the edge of adjacent wetland resource areas except in those locations approved under this filing. Future work within 100' of existing wetland resource areas will require a separate filing with the NACC. The Conservation Administrator and/or other agents of the NACC do not have the authority to waive these setbacks as established under the local Bylaw (Condition#32); ➢ Maintenance of catch basins (Condition #66); ➢ Discharge or spillage of pollutants (Condition#76); ➢ Prohibition of underground fuels (Condition#77); ➢ Limitations on the use of fertilizers, herbicides, road salts,de-icing compounds and pesticides (Conditions #78 & #79); ➢ Prohibition of snow stockpiling/Snow Removal (Conditions #79 & #80); ➢ Maintenance/Repairs to culvert(Condition#81); ➢ The attached "Stormwater Operations and Management Plan",'including Best Management Practices. No additional filings will be required to conduct maintenance of the above referenced system and plan. (Condition #84). CAWinword\00CIWi11owSt.doc 13 NACC 513105 Bk 11049 Pg 225 #2293 DEP FILE#242 - 1279 APPENDIX A—AFFIDAVIT I, on oath do hereby depose and state: (authorized agent of applicant and/ or owner) . (PLEASE CHECK AT LEAST ONE BLOCK) 1} I am the of (position with applicant) (applicant's name) the applicant upon whom the Order of Conditions have been (DEP or NACC File#) placed upon by the North Andover Conservation Commission(NACC). and / or 2) I am the of (position with owner) (owner) the owner upon whose land Order of Conditions have been (DEP or NACC File#) placed upon by the NACC. I hereby affirm and acknowledge that I have received said Order of Conditions and have read the same and understand each and every condition,which has been set forth in said Order of Conditions. ♦ I hereby affirm and acknowledge that on this day of 20 , I inspected said property together with any and, all improvements,which have been made to the same and hereby certify that each and every condition set forth in the Order of Conditions are presently in compliance. ♦ I hereby affirm and acknowledge that this document will be relied upon by the NACC, as well as any potential buyers of said property, which is subject to the Order of Conditions. Signed under the pain and penalties of perjury this day of 2� (Authorized agent of applicant or owner) CAWinwordMC\WillowSt.doc 14 NACC 5/3/05 Bk 11049 Pg 226 #2293 Ir RECEIVED MAR 2 3 2005 Operation A Maintenance PlanNORTH AN CO - CONSERVATION COMMISSION 1.0 Introduction The Stormwater management program for parcel 4 Willow Street, North Andover, MA has been designed to mitigate potential impacts to the quality and quantity of stormwater flowing from the site. In order to ensure that the stormwater management facility performs adequately, a regular schedule of maintenance is required. The following is an overview of the Stormwater Management Facility design followed by the recommended maintenance schedule. 1.1-Maintenance Schedule Annual maintenance 1. Inspect all structures. Remove any debris. 2. Remove excessive debris from stormwater detention facilities. Monthly maintenance 1. Ensure inlet and outlet structures are free of debris. 2. Remove any large debris from stormwater detention facility. Serni-annual maintenance 1. ' Sweep parking lot, with once occurring after last Winter sanding. 2. Inspect the leaching trench at manhole and clean any debris 3. Clean sump at entrance catch basin. 4. Remove debris on rip rap apron. 5. .Inspect the leaching trench manhole base, for sediment. Performance-based maintenance 1. Remove sediment/debris from stormwater detention facility when the depth exceeds three inches. 2. Remove debris from Stormceptor in March& May,each year to remove excess sand. 3. Inspect the leaching trench manhole, following every large storm (>2 inches). 1.2—Snow Removal: snow shall be removed from the site, in perpetuity. 1.3 - Owner of Record--Holbrook Realty Trust Developer—Dr. Sudarshan Chatterjee Bk 11049 Pg 227 #2293 t Ll9Massachusetts Department of Environmental Protection DEP File Number: Bureau of Resource Protection -Wetlands WPA Form 5 - Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 E. Issuance This Order is valid for three years, unless otherwise specified.as a special OS condition pursuant to General Conditions#4, from the date of issuance. 1. Date of lss ante Please indicate the number of members who will sign this form: y This Order must be signed by a majority of the Conservation Commission. 2. Number of Signers The Order must be mailed by certified mail (return receipt requested) or hand delivered to the applicant. A copy also must be mailed or hand delivered at the same time to the appropriate Department of Environmental Protection Region�db, if not filing electronically, and the property owner, if different from applicant. r Signatures: Notary Acknowledgement Commonwealth of Massachusetts County of Essex North '`' On this Day °�`7 Of Montl �1 Year��� Before me, the undersigned Notary Public, 's personally appeared Name of Document Signer - proved to me through satisfactory evidence of identification, which wastwere ckSSac uSe l.' Description of evidence of identification to be the person whose name is signed on the preceding or attached document, and acknowledged to me that he/she signed it voluntarily for its stated purpose. As member of North Andover Conservation Commission City/Town DOM M.WEDGE COULIONNFATHOFMASSAWIffM 0 MyCWMEVkftNuB•7.2009 Signature of Notary Public L) G� Panted Name of Notary Public Place notary seal and/or any stamp above Ub 1 My commissi ri Exp es(Date) This Order is issued to the applicant as follows: ❑ by hand delivery on dby certified mail, return receipt requested, on Date Date wpaform5.doc• rev.1211/04 Page 7 of 9 A Bk 11049 Pg 228 #2293 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands DEP File Number: WPA Form 5 -- Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 F. Appeals The applicant, the owner, any person aggrieved by this Order, any owner of land abutting the land subject to this Order, or any ten residents of the city or town in which such land is located, are hereby notified of their right to request the appropriate DEP Regional Office to issue a Superseding Order of Conditions. The request must be made by certified mail or hand delivery to the Department, with the appropriate filing fee and a completed Request of Departmental Action Fee Transmittal Form, as provided in 310 CMR 10.03(7)within ten business days from the date of issuance of this Order. A copy of the request shall at the same time be sent by certified mail or hand delivery to the Conservation Commission and to the applicant, if he/she is not the appellant. The request shall state clearly and concisely the objections to the Order which is being appealed and how the Order does not contribute to the protection of the interests identified in the Massachusetts Wetlands Protection Act, (M.G.L. c. 131, §40) and is inconsistent with the wetlands regulations (310 CMR 10.00). To the extent that the Order is based on a municipal ordinance or bylaw, and not on the Massachusetts Wetlands Protection Act or regulations, the Department has no appellate jurisdiction. Section G, Recording information is available on the following page. wpaform5.Coc• rev.1211104 Page 8 of 9 F Bk 11049 Pg 229 #2293 ILIMassachusetts Department of Environmental Protection DEp Pile Number: Bureau of Resource Protection - Wetlands WPA Form 5 - Order of Conditions 242-1279 Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 G. Recording Information This Order of Conditions must be recorded in the Registry of Deeds or the Land Court for the district in which the land is located, within the chain of title of the affected property. In the case of recorded land, the Final Order shall also be noted in the.Registry's Grantor Index under the name of the owner of the land subject to the Order. In the case of registered land, this Order shall also be noted on the Land Court Certificate of Title of the owner of the land subject to the Order of Conditions. The recording information on Page 7 of this form shall be submitted to the Conservation Commission listed below. North Andover Conservation Commission Detach on dotted line, have stamped by the Registry of Deeds and submit to the Conservation Commission. --------------------------------------------------------------------------------------------------------------------------- To. North Andover Conservation Commission Please be advised that the Order of Conditions for the Project at: 242-1279 Project Location DEP File Number Has been recorded at the Registry of Deeds of: County Book Page for: Property Owner and has been noted in the chain of title of the affected property in: Book Page In accordance with the Order of Conditions issued on: Date If recorded land, the instrument number identifying this transaction is: Instrument Number If registered land, the document number identifying this transaction is: Document Number Signature of Applicant wpaform5.doc rev.12/1104 Page 9 of 9 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands DEP File Number. VIIPA Form 8B +ftertiticate of Compliance Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 242-1279 Provided by DEP A. Project Information 1.1,,- 17 94. P:o 155 �2�963 Important r_u--14-2022 09 m 17vL When filling out 1• This Certificate of Compliance is issued to: , m c r~ t;h R�--o i sit 1-Is forms on the Sudarshan C_h_att 'ee computer, use Name only the tab key to move 55 South Bradford Street your cursor- Mailing Address do not use the North Andover MA 01845 return nkey. City/Town State Zip Code 2. This Certificate of Compliance is issued for work regulated by.a final Order of Conditions Issued to: Sudashan Chatte 'es Name - May 4 2005 Dated 242-1279 DEP File Humber 3. The project site is located at 189 Willow Street(Lot 4) North Andover Street Address Cityrrown Map 25 Parcel Assessors MapMlat Number Pareel/Lot Number the final Order of Condition was recorded at the Registry of Deeds for. Property Owner(it different) Essex North 11049 205 County Book Page:. . . certificate 4. A site inspection was made In the presence of the applicant, or the applicants agent, on: Date B. Certification Check all that apply: ❑ Complete Certifioatlon: It is hereby certified that the work regulated by the above-referenced Order of Conditions has been satisfactorily completed. ® Partlal Certification: It Is hereby certified that only the following portions of work regulated by the above-referenoed Order of Conditions have been satisfactorily completed.The project areas or work subject to this partial certification that have been completed and are released from this Order are: Installation of 8W6'box culvert and construction of 925 s.f. replication area(only size of replication Atftff; area confirmed no monitoring of replication area success has been completed). Lot cleared in AT uacopy accordance with approved limit of work. No additional work may be conducted without a new Notice of Intent. 7'e tvu C[e�k •.rev.7HW4 Pepe Z or4 Bk 17594 Pg156 #23968 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands � DEP Fite Number. WPA Form 8B — Certificate of Compliance pcoc,, Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 242-9279 Provided by DEP B. Certification (cont.) ❑ Invalid Order of Conditions: It is hereby certified that the work regulated by the above-referenced Order of Conditions never commenced.The Order of Conditions has lapsed and is therefore no longer valid. No future work subject to regulation under the Wetlands Protection Act may commence without filing a new Notice of Intent and receiving a new Order of Conditions. Ongoing Conditions:The following conditions of the Order shall continue:(Include any conditions contained in the Final Order, such as maintenance or monitoring,that should continue for a longer period). Condition Numbers: 7 '717 99 P C. Authorization Issued by: ' North Andover d Conservation Commission Date f iss nce This Certificate must be signed by a majority of the Conservation Commission and a copy sent to the applicant and_appropriAte Q.P Regional Office(See Attachment). Signatures: ���� • 10 //Y, wpdorm ab,doc•mv.7113M4 Page 2 of 4 Bk 17594 Pg157 #23968 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands DEP File Number. WPA Form 8B — Certificate of Compliance pcdc Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 2�42-1279 Provided by DEP C. Authorization (cont.) Notary Acknowledgement Commonwealth of Massachusetts County of Essex North On this l y Of mod Day Morlth Year before me,the undersigned Notary Public, personally appeared .John Mabon Name of Document Signer proved to me through satisfactory evidence of identification,which was/were Massachusetts License Description of evidence of identification to be the person whose name is signed on the preceding or attached document, and acknowledged to me that he/she signed it voluntarily for its stated purpose. As member of North Andover city/Town Conservation Commission Signature of Notary Public E* t1INMrPOW Printed ffairie of Notary Public My Co issio Expires(Date) Place notary seal and/or any stamp above Signature of Notary Public wpafarm eb.doc•ray.VI304 Page 3&41 Bk 17594 Pg158 #23968 Massachusetts Department of Environmental Protection Bureau of Resource Protection -Wetlands DEP File Number. WPA Form 8B - Certificate of Compliance PcvC' MassachLusetts Wetlands Protection Act M.G.L. c. 131, 40 242-1279 Provided by DEP D. Recording Confirmation The applicant is responsible for ensuring that this Certificate of Compliance is recorded in the Registry of Deeds or the Land Court for the district in which the land is located. Detach on dotted tine and submit to the Conservation Commission. To: North Andover Conservation Commission Please be advised that the Certificate of Compliance for the project at 189 Willow Street(Lot 4) 242-1279 Project location DEP He Number Has been recorded at the Registry of Deeds of: Essex North .County for. Sudarshan Chatte iee Property Owner and has been noted in the chairs of title of the affected property on: Date Book Page If recorded land, the instrument number which identifies this transaction is: If registered land, the document number which identifies this transaction is: Document Number Signature of Applicant wpararm 8h*x•,ev.7n3w4 Page 4 of 4 Appendix B: Figures ➢ Figure 1 —USGS Locus Map ➢ Figure 2—FEMA Flood Insurance Rate Map • LOMA 100 Willow Street • LOMA 733 Turnpike Street ➢ Figure 3 —NHESP Map This Page Intentionally Left Blank Figure 1 - USGS Locus Map w N tl 9 ; N f >; i�lxlry "` 1"!I t i X J T; U4q. 9 N 1w� k d ww,S NZ o o°,, J3 � q nm p IQ a •� ,r , ati 11/19/2022, 3:40:14 PM 1:9,028 0 0.05 0.1 0.2 mi 0 0.07 0.15 0.3 km USGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S. Census USGS 2021 USGS This page intentionally left blank National Flood Hazard Layer FIRMette FEMA Legend 71o7l"W 42039'58"N SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT Without Base Flood Elevation(BFE) Am me Z A V-A99 t 4F With EFE or Depth ZaneAE,-AO,AH,VEAR SPEC AL FLOOD NIL, HAZARD AREAS Regulatory Floodway 0.2%Annual Chance Flood Hazard,Areas of 1%annual chance flood with average depth less than one foot or with drainage areas of less than one square mile zc-,�e X woo- Future Conditions 1%Annual wo DJ-1AZARD Chance Flood Hazard zo—x Area with Reduced Flood Risk due to g Levee.See Notes z-e x OTHER AREAS OF FLOOD HAZARD 'gp jg\01 Area with Flood Risk due to Levee NO SCREEN Area of Minimal Flood Hazard zcmex M !Mq Effective LOMRs OTHER AREAS Area of Undetermined Flood Hazard z-e D "'Aga GENERAL Channel,Culvert,or Storm Sewer STRUCTURES I 1 1 I 1 1 I Levee,Dike,or Floodwall ti Cross Sections with 1%Annual Chance 17*5 Water Surface Elevation — — — Coastal Transect —5i3— Base Flood Elevation Line(BFE) Limit of Study Jurisdiction Boundary Coastal Transect Baseline 0! OTHER Profile Baseline A FEATURES Hydrographic Feature Digital Data Available N il"'No No Digital Data Available MAP PANELS Unmapped Ilk\411% MR The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. VF ZEN This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The base map shown com pi i es w ith FE MA's base ma p accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA.This map was exported on 10,126,12022 at 2:23 PM and does not reflect changes or amendments subsequent to this date and time.The NFHL and effective information may change or become superseded by new data overtime. This map image is void if the one or more of the following map elements do not appear basemap imagery,flood zone labels, legend,scale bar,map creation date,community identifiers, FIRM panel number,and FIRM effective date.Map images for Feet 1:6,000 7106'23"W unmapped and unmodernized areas cannot be used for 0 250 500 1,000 1,500 2,000 regulatory purposes. Basemap:USGS National Map:Orthoimagery.Data refreshed October,2020 Page 1 of 2 Date: August 14, 2014 Case No.: 14-01-2559A LOMA Federal Emergency Management Agency Washington,D.C. 20472 �`1ND S0G LETTER OF MAP AMENDMENT DETERMINATION DOCUMENT (REMOVAL) COMMUNITY AND MAP PANEL INFORMATION LEGAL PROPERTY DESCRIPTION TOWN OF NORTH ANDOVER, Lot D, as described in the Quitclaim Deed, recorded as Document ESSEX COUNTY, No. 14976, in Book 11207, Pages 62 and 63, in the Office of the MASSACHUSETTS Registry of Deeds, Essex County, Massachusetts COMMUNITY COMMUNITY NO.:250098 NUMBER: 25009CO236F AFFECTED MAP PANEL DATE: 7/3/2012 FLOODING SOURCE: LOCAL FLOODING APPROXIMATE LATITUDE&LONGITUDE OF PROPERTY:42.659, -71.110 SOURCE OF LAT&LONG:ARCGIS 10.2 DATUM: NAD 83 DETERMINATION OUTCOME 1%ANNUAL LOWEST LOWEST WHAT IS CHANCE ADJACENT LOT LOT BLOCK/ SUBDIVISION STREET REMOVED FROM FLOOD FLOOD GRADE ELEVATION SECTION THE SFHA ZONE ELEVATION ELEVATION (NAVD 88) (NAVD 88) (NAVD 88) D -- -- 100 Willow Street Property X -- -- 236.5 feet (unshaded) Special Flood Hazard Area (SFHA) - The SFHA is an area that would be inundated by the flood having a 1-percent chance of being equaled or exceeded in any qiven year(base flood). ADDITIONAL CONSIDERATIONS(Please refer to the appropriate section on Attachment 1 for the additional considerations listed below.) ZONE A This document provides the Federal Emergency Management Agency's determination regarding a request for a Letter of Map Amendment for the property described above. Using the information submitted and the effective National Flood Insurance Program (NFIP) map, we have determined that the property(ies) is/are not located in the SFHA, an area inundated by the flood having a 1-percent chance of being equaled or exceeded in any given year (base flood). This document amends the effective NFIP map to remove the subject property from the SFHA located on the effective NFIP map; therefore, the Federal mandatory flood insurance requirement does not apply. However, the lender has the option to continue the flood insurance requirement to protect its financial risk on the loan. A Preferred Risk Policy (PRP) is available for buildings located outside the SFHA. Information about the PRP and how one can apply is enclosed. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at (877) 336-2627 (877-FEMA MAP) or by letter addressed to the Federal Emergency Management Agency, LOMC Clearinghouse, 847 South Pickett Street, Alexandria,VA 22304-4605. x Luis Rodriguez, P.E.,Chief Engineering Management Branch Federal Insurance and Mitigation Administration Page 2 of 2 Date: August 14, 2014 Case No.: 14-01-2559A LOMA Federal Emergency Management Agency Washington,D.C. 20472 �`1ND S0G LETTER OF MAP AMENDMENT DETERMINATION DOCUMENT (REMOVAL) ATTACHMENT 1 (ADDITIONAL CONSIDERATIONS) ZONE A (This Additional Consideration applies to the preceding 1 Property.) The National Flood Insurance Program map affecting this property depicts a Special Flood Hazard Area that was determined using the best flood hazard data available to FEMA, but without performing a detailed engineering analysis. The flood elevation used to make this determination is based on approximate methods and has not been formalized through the standard process for establishing base flood elevations published in the Flood Insurance Study. This flood elevation is subject to change. This attachment provides additional information regarding this request. If you have any questions about this attachment, please contact the FEMA Map Assistance Center toll free at (877) 336-2627(877-FEMA MAP) or by letter addressed to the Federal Emergency Management Agency, LOMC Clearinghouse,847 South Pickett Street,Alexandria,VA 22304-4605. x Luis Rodriguez, P.E.,Chief Engineering Management Branch Federal Insurance and Mitigation Administration Page 1 of 2 Date: February 04, 2016 Case No.: 16-01-0699A LOMA Federal Emergency Management Agency Washington,D.C. 20472 �`1ND S0G LETTER OF MAP AMENDMENT DETERMINATION DOCUMENT (REMOVAL) COMMUNITY AND MAP PANEL INFORMATION LEGAL PROPERTY DESCRIPTION TOWN OF NORTH ANDOVER, Lot 1, as shown on the Subdivision Plan of Land recorded as Plan ESSEX COUNTY, No. 10023, in the Office of the Register of Deeds, Essex County, MASSACHUSETTS Massachusetts (TM: 98D; TL: 69) COMMUNITY COMMUNITY NO.:250098 NUMBER: 25009CO236F AFFECTED MAP PANEL DATE: 7/3/2012 FLOODING SOURCE: LOCAL FLOODING APPROXIMATE LATITUDE&LONGITUDE OF PROPERTY:42.661, -71.111 SOURCE OF LAT&LONG:GOOGLE EARTH PRO DATUM: NAD 83 DETERMINATION OUTCOME 1%ANNUAL LOWEST LOWEST WHAT IS CHANCE ADJACENT LOT LOT BLOCK/ SUBDIVISION STREET REMOVED FROM FLOOD FLOOD GRADE ELEVATION SECTION THE SFHA ZONE ELEVATION ELEVATION (NAVD 88) (NAVD 88) (NAVD 88) -- -- -- 733 Turnpike Street Structure X -- 236.3 feet -- (unshaded) Special Flood Hazard Area (SFHA) - The SFHA is an area that would be inundated by the flood having a 1-percent chance of being equaled or exceeded in any qiven year(base flood). ADDITIONAL CONSIDERATIONS(Please refer to the appropriate section on Attachment 1 for the additional considerations listed below.) PORTIONS REMAIN IN THE SFHA ZONE A This document provides the Federal Emergency Management Agency's determination regarding a request for a Letter of Map Amendment for the property described above. Using the information submitted and the effective National Flood Insurance Program (NFIP) map, we have determined that the structure(s) on the property(ies) is/are not located in the SFHA, an area inundated by the flood having a 1-percent chance of being equaled or exceeded in any given year (base flood). This document amends the effective NFIP map to remove the subject property from the SFHA located on the effective NFIP map; therefore, the Federal mandatory flood insurance requirement does not apply. However, the lender has the option to continue the flood insurance requirement to protect its financial risk on the loan. A Preferred Risk Policy (PRP) is available for buildings located outside the SFHA. Information about the PRP and how one can apply is enclosed. This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any questions about this document, please contact the FEMA Map Assistance Center toll free at (877) 336-2627 (877-FEMA MAP) or by letter addressed to the Federal Emergency Management Agency, LOMC Clearinghouse, 847 South Pickett Street, Alexandria,VA 22304-4605. x Luis Rodriguez, P.E.,Chief Engineering Management Branch Federal Insurance and Mitigation Administration Page 2 of 2 Date: February 04, 2016 Case No.: 16-01-0699A LOMA Federal Emergency Management Agency Washington,D.C. 20472 �`1ND S0G LETTER OF MAP AMENDMENT DETERMINATION DOCUMENT (REMOVAL) ATTACHMENT 1 (ADDITIONAL CONSIDERATIONS) PORTIONS OF THE PROPERTY REMAIN IN THE SFHA (This Additional Consideration applies to the preceding 1 Property.) Portions of this property, but not the subject of the Determination/Comment document, may remain in the Special Flood Hazard Area. Therefore, any future construction or substantial improvement on the property remains subject to Federal, State/Commonwealth, and local regulations for floodplain management. ZONE A (This Additional Consideration applies to the preceding 1 Property.) The National Flood Insurance Program map affecting this property depicts a Special Flood Hazard Area that was determined using the best flood hazard data available to FEMA, but without performing a detailed engineering analysis. The flood elevation used to make this determination is based on approximate methods and has not been formalized through the standard process for establishing base flood elevations published in the Flood Insurance Study. This flood elevation is subject to change. This attachment provides additional information regarding this request. If you have any questions about this attachment, please contact the FEMA Map Assistance Center toll free at (877) 336-2627(877-FEMA MAP) or by letter addressed to the Federal Emergency Management Agency, LOMC Clearinghouse,847 South Pickett Street,Alexandria,VA 22304-4605. x Luis Rodriguez, P.E.,Chief Engineering Management Branch Federal Insurance and Mitigation Administration This page intentionally left blank � 125 125 ,� rc 125 � 'i i I I'I h�IIII i m . IIII W �••. i I I I4 FIGURE 3 - NHESP MAP 0' 2000' 4000' SCALE: 1"=2,000' NORTH ANDOVER Priority Habitats and Estimated Habitats Priority Habitats,for use with the MA Endangered Species Act Regulations(321 CMR 10) Estimated Habitats for use with the MA Wetlands Protection Act Regulations(310 CMR 10) ; Effective August 1 2021, Na.Aty ItlakrMn of H-,sp.,J. A+n�pprcit'V 142WP4un uB k«Mru Sprre4wsaoraf sVffiRa -. ? 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This page intentionally left blank Appendix C: Abutter Notification ➢ Affidavit of Service ➢ List of Abutters ➢ Abutter Notification Letter This Page Intentionally Left Blank AFFIDAVIT OF SERVICE Under the Massachusetts Wetlands Protection Act (to be submitted to the Massachusetts Department of Environmental Protection and the Conservation Commission when filing a Notice of Intent) I, Amanda Ogren-Moda, hereby certify under the pains and penalties of perjury that on November 21, 2022 I gave notification to abutters in compliance with the second paragraph of Massachusetts General Laws, Chapter 1, Section 40, and the DEP Guide to Abutter Notification dated April 8, 1994, in connection with the following matter: Construction of a 7,776-sf. business office building associated parking, access, utilities and stormwater management. A Notice of Intent filed under the Massachusetts Wetlands Protection Act by Vincent J. Grasso with the North Andover Conservation Commission on November 7, 2023 for property located at 189 Willow Street, North Andover,Massachusetts. The form of the notification, and a list of the abutters to whom it was given and their addresses, are attached to this Affidavit of Service. m November 7, 2023 Name Date Notice of Intent 189 Willow Street North Andover,MA This page intentionally left blank Abutter to Abutter(J Building Dept. ( ) Conservation (X) Zoning ( ) TOWN OF NORTH ANDOVER ABUTTER LIST REQUIREMENT. MGL 40A,Section 11 states in part"Parties in interest as used in this chapter shall mean the petitioner, abutters,owners of land directly opposite on any public or private way,and abutters to abutters within three hundred(300)feet of the property line of the pettitioner as they appear on the most recent applicable tax list,not withstanding that the land of any such owner is located in another city or town,the planning board of the city or town,and the planning board of every abutting city or town." SUBJECT LOCATION OWNER ADDRESS TOWN STATE ZIP 025.0-0187-0000.0 189 WILLOW STREET VINCENT J,GRASSO 30 FAULKNER ROAD NORTH ANDOVER MA 1845 PARCEL ID LOCATION OWNER ADDRESS CITY STATE ZIP 025.0-0027-0000.0 300 WILLOW STREET EXECUTIVE CENTER LIMITED PARTN 43 GIGANTE DRIVE HAMPSTEAD NH 03841 025.0-0050-0000.0 643 TURNPIKE STREET PANCORBO,OSCAR C 643 TURNPIKE STREET NORTH ANDOVER MA 01845 025.0-0053-0000.0 651 TURNPIKE STREET JALBERT,LINDA J 176 KARA DRIVE NORTH ANDOVER MA 01845 025.0-0073-0000.0 11 BAYFIELD DRIVE BUD REALTY TRUST 11 BAYFIELD DRIVE NORTH ANDOVER MA 01845 025.0-0166-0000.0 WILLOW STREET HOLBROOK REALTY TRUST 38 SARAH J CIRCLE HAVERHILL MA 1832 098.D-0007-0000.0 690 TURNPIKE STREET SAVILLE DEVELOPMENT REALTY TR. PO BOX 412 NORTH ANDOVER MA 01845 098.D-0020-0000.0 60 BOOTH STREET TOWN OF NORTH ANDOVER 120 MAIN STREET NORTH ANDOVER MA 01845 098.D-0021-0000.0 674 TURNPIKE STREET 39 COTUIT STREET,LLC 674 TURNPIKE STREET NORTH ANDOVER MA 01845 098.D-0022-0000.0 19 INNIS STREET LARKIN,PATRICK J. 674 TURNPIKE STREET NORTH ANDOVER MA 01845 098.D-0030-0000.0 23 INNIS STREET LEI,CATHERINE Y. P.O.BOX 334 NORTH SALEM NH 03073-0334 098.D-0031-0000.0 16 INNIS STREET HALLORAN,LEONARD 240 STEVENS STREET NORTH ANDOVER MA 01845 098.D-0032-0000.0 22 INNIS STREET BARTOLOTTA,KEVIN,M. PO.BOX 456 HAMPSTEAD NH 03841 098.D-0037-0000.0 642 TURNPIKE STREET AJKJ BART LLC 642 TURNPIKE STREET NORTH ANDOVER MA 01845 098.D-0038-0000.0 TURNPIKE STREET SAVILLE SECOND REALTY TRUST PO BOX 412 NORTH ANDOVER MA 01845 098.D-0046-0000.0 TURNPIKE STREET SCHWARZ E.&G.TOBEY N.MCDOW 220 ABBOTT STREET NORTH ANDOVER MA 01845 098.D-0047-0000.0 707 TURNPIKE STREET 707 TURNPIKE,LLC 2 WYNMOOR DRIVE SCARBOROUGH ME 04074 098.D-0069-0000.0 733 TURNPIKE STREET TURNPIKE FLAGSHIP,LLC 359 MAIN STREET,STE.220 HAVERHILL MA 01830 This Certifies that the n&M64 appo&rkV on the records of the sq as I0 d—e-a Carlaled by: Date ��-2-�� This page intentionally left blank NOTIFICATION TO ABUTTERS Under the Massachusetts Wetlands Protection Act The North Andover Wetlands Protection Bylaw In accordance with the Massachusetts General Laws, Chapter 131, Section 40, as amended, and the North Andover Wetlands Protection Bylaw, (Chapter 178),you are hereby notified of the following: The name of the applicant is Vincent J. Grasso The applicant has filed a Notice of Intent with the North Andover (application) Conservation Commission(NACC) for the purposes of construction of a business/office (project description) building, parking, utilities and stormwater management at 189 Willow Street(Map 25 Parcel 167) (site address) The North Andover Conservation Commission will hold a public hearing on WEDNESDAY, December 13, 2023 at 7:00 P.M. in the Board of Selectmen Meeting (date) Room, Town Hall, 120 Main Street,North Andover,MA Copies of the Notice of Intent may be examined or obtained for a fee from: (application) (check all boxes that apply): ❑ Applicant at 0 Representative at Hayes Engineering, Inc. -603 Salem Street-Wakefield, MA 0 Conservation Department, 120 Main Street,North Andover, MA 01845, Monday through Thursday 8:00 a.m. to 4:30 p.m., Tuesday 8:00am to 6:00pm and Friday 8:00 am to 12:00pm. Please call the Conservation Department at 978.688.9530 beforehand to verify arrangements. Copies may be available for a fee. Further information regarding the hearing, or the Wetlands Protection Act,may be obtained from the Conservation Department at 978.688.9530. NOTE: Notice of the public hearing,including its date, time, and place will be published in the Lawrence Eagle-Tribune at least five (5)business days in prior to the public hearing date. NOTE: Notice of the public hearing, including its date,time, and place will be posted in the Town Hall, 120 Main Street,North Andover,MA 01845 at least 48 hours prior to the public hearing date. NOTE: You may also contact the Conservation Department or the Northeast Regional Department of Environmental Protection Office for more information about this application or the MA Wetlands Protection Act. To contact the Northeast Regional Department of Environmental Protection Office, call 978.694.3200. This page intentionally left blank zo� Appendix D: Stormwater Management Report Notice of Intent 189 Willow Street North Andover,MA This Page Intentionally Left Blank Notice of Intent 189 Willow Street North Andover,MA Stormwater Manag ement Rep ort 189 Willow Street Map 25 Parcel 167 North Andover, Massachusetts Proposed Business Office Building Prepared by: Hayes Engineering, Inc. 603 Salem Street Wakefield, Massachusetts 01880 4ff4 p. 781.246.2800 f. 781.246,7596 711�0 www.hayeseng.com Applicant and Owner: Vincent J. Grasso 30 Faulkner Road North Andover, Massachusetts 01845 November 6, 2023 This Page Intentionally Left Blank Table of Contents Section 1 —Project Narrative 5 1.1 Pre-Development Conditions 5 1.2 Post-Development Conditions 5 Section 2 — Stormwater Management 5 2.1 Pre-Development Conditions 5 2.1.1 Drainage System 5 2.1.2 Watershed 6 2.1.3 Runoff Calculations 6 2.2 Post-Development Conditions 7 2.2.1 Drainage System 7 2.2.2 Watershed 7 2.2.3 Runoff Calculations 7 Section 3 — Stormwater Standards 8 3.1 Standard I —No New Untreated Discharges 8 3.2 Standard 2—Peak Rate Attenuation 9 3.3 Standard 3 —Recharge 9 3.4 Standard 4—Water Quality 10 3.5 Standard 5—LUHPPL 13 3.6 Standard 6— Critical Areas 14 3.7 Standard 7—Redevelopment Projects 14 3.8 Standard 8— Construction Period Pollution Prevention 14 3.9 Standard 9— Operations and Maintenance 15 3.10 Standard 10—Illicit Discharges 15 Section 4 — Conclusion 16 Stormwater Management Report 189 Willow Street North Andover,MA Page 3 Appendices Appendix A: NRCS Soil Mapping Appendix B: HydroCAD Calculations Appendix C: Stormwater Checklist Appendix D: Construction Period Pollution Prevention Plan Appendix E: Long Term Operations and Maintenance Plan Stormwater Management Report 189 Willow Street North Andover,MA Page 4 1.0 Project Narrative Vincent J. Grasso, hereinafter the "Applicant," "Owner," and/or the "Proponent," seeks to construct a commercial building for use as a business office, associated parking, landscaping, utilities and stormwater management appurtenances (the "Project" or the "Work"). The work is proposed within the buffer zone to a bordering vegetated wetland (`BVW"), within the isolated vegetated wetland("IVW") of local jurisdiction, and minor incursion into bordering land subject to flooding ("BLSF")resource areas. 1.1 Pre-Development Conditions The Project Site, located at 189 Willow Street is located within an existing commercial area to the west of Turnpike Street(Route 114) and along the easterly sideline of Willow Street. The site was previously permitted with an Order of Conditions issuing on May 4, 2005, for the construction of a commercial building and parking under DEP File No. 242- 1279. The work proceeded with tree clearing, stripping of soil and installation of a box culvert to across the BVW resource area adjacent Willow Street. The building and parking were never constructed. A Certificate of Compliance was issues on September 14, 2009, for the work performed. The site is now revegetated with white pine saplings and opportunistic, hydrophytic vegetation in the areas of previous disturbance. The United States Department of Agriculture Natural Resource Conservation Service (NRCS) Soil Survey mapping indicates that soils on site are representative of Hydrologic Soil Group (HSG) D. NRCS Soil Survey Mapping and Soil Data accompany this report as Appendix A. 1.2 Post-Development Conditions The Project consists of the construction of a 6,667-s£ business office building, associated parking, utilities, and stormwater management appurtenances. Proposed stormwater management for the Project consists of the construction of a sediment forebay, treatment Swale and extended detention basin to provide TSS removal and mitigation of peak flows. Because of the highwater table and presence of poorly drained HSG D soils no recharge is proposed with the project. 2.0 Stormwater Management 2.1 Pre-Development Conditions 2.1.1 Drainage Systenz The Project Site in the pre-development conditions drains to the bordering vegetated wetlands that surrounds the site. Portions of the site to the west are Stormwater Management Report 189 Willow Street North Andover,MA Page 5 associated with the Bordering Land Subject to Flooding (BLSF) for Mosquito Brook. 2.1.2 Watersheds Under existing conditions, the site wholly drains to the adjacent BVW. The Site has been modelled using a single sub-catchment tributary to the design point of comparison at the edge of the BVW associated with wetland flag series A. 2.1.3 Runoff Calculations Runoff calculations were performed in accordance with the methodology outlined in the NRCS Soil Conservation Service (SCS) methods as defined in Technical Release 55 (TR-55) and Technical Release 20 (TR-20) which are the basis for they HydroCAD®hydrologic model. Existing cover conditions and times of concentrations were used to generate runoff hydrographs for the sub-catchment in each of the Type III design storms in accordance with NOAA Atlas 14, as identified in Table 1. Table I -Design Storms—NOAA Atlas 14 DESIGN STORM RAINFALL (RETURN FREQUENCY) (INCHES/24-HOURS) 2-year 3.18 10-year 5.04 25-year 6.20 100-year 7.99 Pre-development peak rates of runoff to the Study Point of Comparison are summarized in Table 2, below. Table 2 -Pre-Development Condition Peak Rates of Runoff 2-yr Storm 10-yr Storm 25-yr Storm 100-yr Storm Peak Flow Peak Flow Peak Flow Peak Flow (QP) (QP) (QP) (QP) Study Point cfs) (cfs) (cfs) (cfs E.1 1.0 2.2 3.0 4.3 Stormwater Management Report 189 Willow Street North Andover,MA Page 6 2.2 Post-Development Conditions 2.1.1 Drainage System The Project Site in the post-development conditions drains to the bordering vegetated wetlands that surrounds the site. Newly created impervious surfaces are routed through a treatment system consisting of a sediment forebay, water treatment swale, and extended detention basin prior to discharge at a terminal level spreader. 2.1.2 Watersheds Under the proposed conditions, the site wholly drains to the adjacent BVW. The Site has been modelled using six (6) sub-catchment tributary to the design point of comparison at the edge of the BVW associated with wetland flag series A. Theses sub-catchment areas are: P.1 the driveway area tributary to the existing catch-basin on Willow St; P.2 the proposed rooftop; P.3 the proposed detention basin; P.4 the driveway and parking areas; P.5 the areas tributary to the BVW by overland flow; and P.6 the area directly tributary to the expanded IVW 2.1.3 Runoff Calculations Similar to the pre-development conditions runoff calculations were performed in accordance with the methodology outlined in the NRCS Soil Conservation Service (SCS) methods as defined in Technical Release 55 (TR-55) and Technical Release 20 (TR-20) which are the basis for they HydroCAD® hydrologic model. Existing cover conditions and times of concentrations were used to generate runoff hydrographs for the sub-catchment in each of the Type III design storms in accordance with NOAA Atlas 14, as identified previoulsy in Table 1. Post-development peak rates of runoff to the Study Point of Comparison are summarized in Table 3, below. Table 3 -Post-Development Condition Peak Rates of Runoff 2-yr Storm 10-yr Storm 25-yr Storm 100-yr Storm Peak Flow Peak Flow Peak Flow Peak Flow (QP) (QP) (QP) (QP) Study Point (cfs) (cfs (cfs) (cfs DP.1 0.9 1.9 2.5 3.9 Stormwater Management Report 189 Willow Street North Andover,MA Page 7 3.0 Stormwater Standards The proposed storm water management system has been designed to comply with the ten (10) standards of the MaDEP Storm Water Management Policy to the maximum extent practicable. Each of the standards and the extent of Project compliance are summarized below. Please refer to Appendix D for the completed MassDEP Storm Water Checklist. 3.1 Standard 1 —No New Untreated Discharges No new storm water conveyances (e.g. outfalls) may discharge untreated storm water directly to or cause erosion in wetlands or waters of the Commonwealth. The Project does not discharge any storm water from newly created impervious surfaces directly to a wetland or water of the Commonwealth. Storm water quality controls are proposed including a sediment forebay, water quality treatment Swale, and extended detention basin. Treated stormwater enters the BVW via the culvert discharge from RESO 1, the extended detention basin. The 2-year, 24-hour storm velocity identified in the HydroCAD model is 2.57 feet per second (fps)prior to entering the proposed level spreader. Table 2.3.1 of Volume 3, Chapter 1 of the Massachusetts Department of Environmental Protection's (MaDEPs) Stormwater Handbook(provided below)provides permissible velocities for channels using the maximum velocity for the 2-year, 24-hour storm. The maximum velocity in the 2-year, 24-hour storm (2.47 fps) is below the permissible velocity for a grass having a channel slope between 0 and 5-percent. Channel Slope Lining Permissible Velocity (feet/second) 0-5% Tall fescue Kentucky bluegrass 5 Grass-legume mixture 4 Red fescue Redtop 2.5 Sericea lespedeza Annual lespedeza Small grains 5- 10% Tall fescue Kentucky bluegrass 4 Grass-legume mixture 3 Greater Than 10% Tall fescue Kentucky bluegrass 3 Table 2.3.1:Example of Permissible Velocity Table,Modified front Soil and Water Conservation Enzineerinv 1992, Schwab et al,John Wiley and Sons Stormwater Management Report 189 Willow Street North Andover,MA Page 8 3.2 Standard 2 — Peak Rate Attenuation Storm water management systems shall be designed so that post-development peak discharge rates do not exceed pre-development peak discharge rates. Storm water management controls to mitigate peak rates of runoff from the Project were developed for the 2, 10, 25, and 100-year, 24-hour design storm events. As previously stated, runoff calculations were performed in accordance with the methodology outlined in the NRCS Soil Conservation Service (SCS)methods as defined in Technical Release 55 (TR-55) and Technical Release 20 (TR-20) which are the basis for they HydroCAD® hydrologic model. Calculations are provided as Appendix B to this report. Table 4 summarizes the pre- and post-development peak rates of runoff for the Project: Table 3 -Peak Rates of Runoff Comparison Study 2y Storm IOy Storm 25yStorm I00yStorm Point QP QP QP QP (cfs) (Os) (cfs) (cfs) Pre Post 0 Pre Post 0 Pre Post 0 Pre Post 0 DPI 1.0 0.9 -0.1 2.2 1.9 -0.3 3.0 2.5 -0.5 4.3 3.9 -0.4 3.3 Standard 3 — Recharge Loss of annual recharge to groundwater shall be eliminated or minimized through the use of infiltration... At a minimum, the annual recharge from the post-development site shall approximate the annual recharge from pre-development conditions based on soil type. This Standard is met when the storm water management system is designed to infiltrate the required recharge volume as determined in accordance with the Massachusetts Storm Water Handbook. As previously stated, the Project Site consists of soils representative of HSG D. As such this standard is being met to the maximum extent practicable. A recharge volume is provided within the treatment Swale and extended detention basin. This volume will provide some infiltration but due to soil conditions and seasonal high groundwater elevations not all requirements of this standard may be met. In accordance with the Massachusetts Storm Water Handbook the required recharge volume (Rv) for the Project equals a depth of runoff corresponding to the soil type time the impervious areas covering that soil type at the post-development site. As previously stated and documented in Appendix A, soils on-site include D. The target depth factor(F) identified by hydrologic soil type is identified in Table 2.3.2: Recharge Depth by Hydrologic Soil Group of the Massachusetts Storm Water Handbook(and included as Table 10, below). Stormwater Management Report 189 Willow Street North Andover,MA Page 9 Table 4 ..Recharge Target Depth by Hydrologic Soil Group NRCS APPROX. SOIL HYDROLOGIC TARGET DEPTH SOIL TYPE TEXTURE FACTOR(F) A sand 0.6-inch B loam 0.35-inch C silty loam 0.25-inch D clay 0.1-inch Total Impervious: 17,644 sf. Required Recharge Volume: 17,644 s£ x 0.1"x F/12" = 147 c£ Treatment Swale Volume: Change in Cumulative Elevation Area Average Area Height Volume Volume feet NAVD88 wwwwwwmwwwwwww�feet�wwww w ww� wwwwwww,. �fww 237 40 i ww wwwwwww 0 150 1 150 -- - - -- --- -- -- -- ....... 238..... �... ..260 ........ 150 415 .67 238.67 590 E 278.1 428 Treatment Volume in Extended Detention Basin: Change in Cumulative Elevation Area Average Area Height Volume Volume feet NAVD888 ww f w www d wwwwwwwwwwwwww�feet)www. w ww wwwwwww, cf. 236.5 1400 vww 0 1,575 0.5 788 _ 237.0 1750 I 788 Total Recharge Volume Provided: 428 cf+ 788 cf= 1,216 c£ Draw Down Analysis: Static Method: _ Rv Timedrawdown (K)(Bottom Area) Where: Stormwater Management Report 189 Willow Street North Andover,MA Page 10 Rv is the Storage Volume Required K is the Saturated Hydraulic Conductivity(for "Static" Method, use Rawls Rate) Bottom Area is the Bottom Area of Recharge Structure 1982 Rawls Rates Infiltration Rate Texture Class NRCS Hydrologic Soil Group HSGI Inches/Hour Sand A 8.27 Loamy Sand A 2.41 Sandy Loam B 1.02 Loam B 0.52 Silt Loam C 0.27 Sandy Clay Loam C 0.17 Clay Loam D 0.09 Silty Clay Loam D 0.06 Sandy Clay D 0.05 Silty Clay D 0.04 Clay D 0.02 _ Rv Tim edrawdown (K)(Bottom Area) 147 c f 24.5 hours (0.05"/hr)(40 + 1,400 s f) The infiltration systems will draw down within the required 72-hour time frame. 3.4 Standard 4 — Water Quality Stormwater management systems shall be designed to remove 80% of the average annual post-construction load of Total Suspended Solids (TSS). The standard is met with pollution prevention plans, storm water best management practices sized to capture the required water quality volume, and pretreatment measures. Runoff generated by new impervious surfaces will be collected and, when required, treated with a sediment forebay water quality swale and extended detention designed to provide in excess of 80%removal of post-construction total suspended solids. Stormwater Management Report 189 Willow Street North Andover,MA Page 11 TSS Removal Calculation: Forebay (0% TSS Removal as it is required for Swale and Extended Detention) Water Quality Swale: 70% TSS Removal 30% Remaining Extended Detention: 50% TSS Removal 15% Remaining Total TSS Removal= 100% - 15% Remaining = 85% Forebay Sizing Calculation: Pavement Area: 10,258 sf. (P.4) Required Volume= 0.1" x 10,258 sf. = 85 cf Forebay Volume (FB.1): Change in Cumulative Elevation Area Average Area Height Volume Volume „ww(Qeet NAVD88 _ sQ. sf. feet cf� mw wwwwww,cfw w 238.0 L. 125 W... 23 1.8 67 0 . _ 225___ ___ �117 117 cf. of storage is provided in the forebay. Treatment Swale Sizing Calculation: Pavement Area: 10,258 sf. (P.4) Required Volume= 0.5" x 10,258 sf. =427 cf Treatment Swale Volume: Change in Cumulative Elevation Area Average Area Height Volume Volume (feet aNAVD88) (sf.) _Wf. �: .......w.......Meet).... ...w.... ..._ .(CL)........, (cfw) e 237 _ 40 1 0 _238__ ._.__.__}_ _._260___. ___T _150 1 _150 150 415 C7 238.67 �..: 570 ... �: ........ 278.1 428 ........ ........ ........ ........ 428 cf of storage is provided in the treatment swale. Stormwater Management Report 189 Willow Street North Andover,MA Page 12 Extended Detention Sizing Calculation: Impervious Area: 17,347 s£ Required Volume= 0.5" x 17,347 sf. = 723 cf Treatment Volume in Extended Detention Basin: Change in Cumulative Elevation Area Average Area Height Volume Volume feet NAVD88 (S w wwwwwwwwwwwwww.�feet�www. . w wwwwwwww,. �f�. w 236.5 1,400 w w w 0 1,550 0.5 775 _ __ 237.0' 1,700 I 775 775 cf. of storage is provided in the extended detention pond. Operations and maintenance plans for construction and post-development phases of the Project are included as Appendix E and Appendix F, respectively, to this report. 3.5 Standard 5 — Land Uses with Higher Potential Pollutant Loads For land uses with higher potential pollutant loads, source control and pollution prevention shall be implemented in accordance with the Massachusetts Storm Water Handbook to eliminate or reduce the discharge of storm water runoff from such land uses to the maximum extent practicable. If through source control and/or pollution prevention all land uses with higher potential pollutant loads cannot be completely protected from exposure to rain, snow, snow melt, and storm water runoff, the proponent shall use the specific structural storm water BMPs determined by the Department to be suitable for such uses as provided in the Massachusetts Storm Water Handbook. Storm water discharges from land uses with higher potential pollutant loads shall also comply with the requirements of the Massachusetts Clean Waters Act, M.G.L. c. 21, §§26-53 and the regulations promulgated thereunder at 314 CMR 3.00, 314 CMR 4.00 and 314 CMR 5.00. Standard 5 is not applicable to the Project. The Project is not associated with uses that will subject the site to higher potential pollutant loads as defined in the MaDEP Wetlands and Water Quality regulations. Land Uses with Higher Potential Pollutant Loads (LUHPPLs) are identified in 310 CMR 22.20B(2) and C(2) a through k and in and in 310 CMR 22.21(2)(a) 1 through 8 and (b) 1 through 6; areas within a site that are the location of activities that are subject to an individual National Pollutant Discharge Elimination System (NPDES)permit or the NPDES Multi-Sector General Permit; automotive fueling facilities, exterior fleet storage Stormwater Management Report 189 Willow Street North Andover,MA Page 13 areas, exterior vehicle service and equipment cleaning areas; marinas and boatyards; parking lots with high-intensity use; confined disposal facilities and disposal sites. 3.6 Standard 6 — Critical Areas Storm water discharges within the Zone H or Interim Wellhead Protection Area of a public water supply, and storm water discharges near or to any other critical area, require the use of the specific source control and pollution prevention measures and the specific structural storm water best management practices determined by the Department to be suitable for managing discharges to such areas, as provided in the Massachusetts Storm Water Handbook. The Project is not located within, nor does it discharge to a Critical Area. 3.7 Standard 7 — Redevelopment Projects A redevelopment project is required to meet the following Storm Water Management Standards only to the maximum extent practicable:Standard 2, Standard 3, and the pretreatment and structural best management practice requirements of Standards 4, 5, and 6. Existing storm water discharges shall comply with Standard I only to the maximum extent practicable. A redevelopment project shall also comply with all other requirements of the Storm Water Management Standards and improve existing conditions. Standard 7 is not applicable to the Project. The MaDEP Storm Water Management Handbook definition of a redevelopment project is a, "development, rehabilitation, expansion, and phased projects on previously developed sites,provided the redevelopment results in no net increase in impervious area. " 3.8 Standard 8 — Construction Period Pollutant Prevention A plan to control construction-related impacts, including erosion sedimentation and other pollutant sources during construction and land disturbance activities (construction period erosion, sedimentation, and pollution prevention plan), must be developed and implemented. A Construction Period Pollution Prevention and Erosion Control Plan is included as Appendix D to this report. This program details the construction period operation and maintenance for best management practices employed on the project and provides sequencing for pollution prevention measures and erosion and sedimentation controls. Locations of erosion control measures are depicted on the accompanying plan set. 3.9 Standard 9 — Operation and Maintenance Plan A long-term operation and maintenance plan must be developed and implemented to ensure that storm water management systems function as designed. Stormwater Management Report 189 Willow Street North Andover,MA Page 14 A Long Term Operation and Maintenance Plan is included as Appendix E to this report. The Operation and Maintenance program provides details and scheduled for routine and non-routine maintenance to the selected best management practices used in the Project. 3.10 Standard 10 —Illicit Discharges All illicit discharges to the storm water management system are prohibited. Illicit discharges to the storm water management system are discharges that are not entirely comprised of storm water. Discharges to the storm water management system from the following activities or facilities are permissible: • Firefighting • Water Main Flushing • Landscape Irrigation • Uncontaminated Groundwater • Potable Water Sources • Foundation Drains • Air Conditioning Condensation • Footing Drains • Individual Resident Car Washing • Flows from Riparian Habitats and Wetlands • Dechlorinated Water from Swimming Pools • Water Used for Street Sweeping • Water Used to Clean Residential Buildings (without detergents) All other illicit discharges to the storm water management system are prohibited. There are no known illicit discharges anticipated through the completion of this project. Post- construction prevention of illicit discharges is addressed in the Good Housekeeping Practices section of Appendix E. 4.0 Conclusion The Project as proposed has been designed to address both the quality and quantity of storm water runoff from the site improvements. The Project is not subject to the MaDEP Storm Water Standards; however, it has been designed to meet or exceed each of the ten (10) standards to the maximum extent practicable. Stormwater Management Report 189 Willow Street North Andover,MA Page 15 This page intentionally left blank Appendix A: NRCS Soil Mapping This Page Intentionally Left Blank Hydrologic Soil Group—Essex County, Massachusetts,Northern Part (189 Willow Street-North Andover, MA-HSG) o 326550 326610 326670 328730 326790 326850 326910 326970 327030 327090 0 42°39'52"N _ 42°39'52"N ro v n QQ v a , a 0 v S© l Map may not be ua=li:d at this scale. i; 42°39'39"N - - - - - 42°39'39"N 325550 326610 326670 326730 326790 326850 326910 326970 327030 327090 Map Scale:1:2,740 if printed on A landscape(11"x 8.5")sheet. Meters N ° 0 40 80 160 240 Feet 0 100 200 400 600 Map projection:Web Mercator Comer coordinates:WGS84 Edge tics:UTM Zone 19N WGS84 usDA Natural Resources Web Soil Survey 11/18/2022 Conservation Service National Cooperative Soil Survey Page 1 of 4 Hydrologic Soil Group—Essex County, Massachusetts,Northern Part (189 Willow Street-North Andover, MA-HSG) MAP LEGEND MAP INFORMATION Area of Interest(A01) E3 C The soil surveys that comprise your AOI were mapped at Area of Interest(AOI) 1:15,800. C/D Soils D Warning:Soil Map may not be valid at this scale. Soil Rating Polygons A ® Not rated or not available Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil 0 A/D Water Features line placement.The maps do not show the small areas of Streams and Canals contrasting soils that could have been shown at a more detailed B scale. Transportation ® B/D Rails Please rely on the bar scale on each map sheet for map 0 C Interstate Highways measurements. 0 C/D US Routes Source of Map: Natural Resources Conservation Service Web Soil Survey URL: 0 D Major Roads Coordinate System: Web Mercator(EPSG:3857) Not rated or not available Local Roads Maps from the Web Soil Survey are based on the Web Mercator Soil Rating Lines Background projection,which preserves direction and shape but distorts q distance and area.A projection that preserves area,such as the 11111MAerial Photography Albers equal-area conic projection,should be used if more A/D accurate calculations of distance or area are required. B This product is generated from the USDA-NRCS certified data as B/D of the version date(s)listed below. C Soil Survey Area: Essex County, Massachusetts, Northern Part Survey Area Data: Version 18,Sep 9,2022 C/D Soil map units are labeled(as space allows)for map scales D 1:50,000 or larger. Not rated or not available Date(s)aerial images were photographed: May 22,2022—Jun Soil Rating Points 5,2022 A The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background A/D imagery displayed on these maps.As a result,some minor ® B shifting of map unit boundaries may be evident. ® B/D usDA Natural Resources Web Soil Survey 11/18/2022 Iiiiii Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group—Essex County, Massachusetts, Northern Part 189 Willow Street-North Andover, MA-HSG Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 6A Scarboro mucky fine A/D 4.7 30.4% sandy loam,0 to 3 percent slopes 32A Wareham loamy sand,0 A/D 3.3 21.0% to 3 percent slopes 70A Ridgebury fine sandy D 3.6 23.2% loam,0 to 3 percent slopes 72A Whitman fine sandy D 0.0 0.0% loam,0 to 3 percent slopes 310B Woodbridge fine sandy C/D 3.9 25.3% loam,3 to 8 percent slopes Totals for Area of Interest 15.6 100.0% tJJSI)A Natural Resources Web Soil Survey 11/18/2022 Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group—Essex County, Massachusetts, Northern Part 189 Willow Street-North Andover, MA-HSG Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D)and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential)when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff.- None Specified Tie-break Rule: Higher tJJSl)A Natural Resources Web Soil Survey 11/18/2022 Conservation Service National Cooperative Soil Survey Page 4 of 4 Appendix B: HydroCAD Calculations This Page Intentionally Left Blank Post-Development Conditions Pre-Development Conditions P.2 E.1 Roof to t Garden Existing to BVW Roo Detent PondDrivewat Forebay Roof to Scuppers ES01 I- Detenti n Pond Forebay 1 P.1 EP1 � P6 Driveway to CB v Replicated IVW Replicated IVW PPJ.' Deisgn Point 1 P.5 to BVW Su boat Reach on Link Routing Diagram for NOA-0087 189 Willow Street-Drainage r231106, Revised 1-20-10 Prepared by Hayes Engineers, Inc, Printed 11/6/2023 HydroCAD®10.20-3g s/n 03206 ©2023 HydroCAD Software Solutions LLC 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 2 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E.1: Existing to BVW Runoff Area=43,990 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=93' Slope=0.0083 '/' Tc=18.3 min CN=77 Runoff=0.96 cfs 4,390 cf Subcatchment P.1: Driveway to CB Runoff Area=298 sf 100.00% Impervious Runoff Depth=2.95" Tc=6.0 min CN=98 Runoff=0.02 cfs 73 cf Subcatchment P.2: Roof to Rain Garden Runoff Area=7,089 sf 100.00% Impervious Runoff Depth=2.95" Tc=6.0 min CN=98 Runoff=0.49 cfs 1,741 cf Subcatchment P.3: Detention Pond Runoff Area=4,082 sf 0.00% Impervious Runoff Depth=0.97" Flow Length=100' Slope=0.0100 '/' Tc=7.2 min CN=73 Runoff=0.09 cfs 330 cf Subcatchment P.4: Driveway to Forebay Runoff Area=11,645 sf 88.09% Impervious Runoff Depth=2.73" Flow Length=100' Slope=0.0100 '/' Tc=6.0 min CN=96 Runoff=0.78 cfs 2,649 cf Subcatchment P.5: to BVW Runoff Area=18,127 sf 0.00% Impervious Runoff Depth=1.14" Flow Length=50' Slope=0.0050 '/' Tc=8.9 min CN=76 Runoff=0.47 cfs 1,719 cf Subcatchment P6: Replicated IVW Runoff Area=2,749 sf 0.00% Impervious Runoff Depth=0.97" Tc=6.0 min CN=73 Runoff=0.07 cfs 222 cf Pond FB.1: Forebay 1 Peak Elev=238.81' Storage=171 cf Inflow=0.78 cfs 2,649 cf Outflow=0.75 cfs 2,531 cf Pond REP1: Replicated IVW Peak Elev=236.66' Storage=222 cf Inflow=0.07 cfs 222 cf Outflow=0.00 cfs 0 cf Pond RES01: Detention Pond Peak Elev=237.51' Storage=1,761 cf Inflow=1.05 cfs 4,602 cf Outflow=0.51 cfs 3,814 cf Pond ROOF: Roof to Scuppers Peak Elev=252.06' Storage=413 cf Inflow=0.49 cfs 1,741 cf Outflow=0.25 cfs 1,741 cf Link DP.1: Deisgn Point 1 Inflow=0.85 cfs 5,606 cf Primary=0.85 cfs 5,606 cf Total Runoff Area = 87,980 sf Runoff Volume = 11,125 cf Average Runoff Depth = 1.52" 79.94% Pervious = 70,335 sf 20.06% Impervious = 17,645 sf 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment E.1: Existing to BVW Runoff = 0.96 cfs @ 12.27 hrs, Volume= 4,390 cf, Depth= 1.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 43,990 77 Woods, Good, HSG D 43,990 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.8 50 0.0083 0.05 Sheet Flow, Sheet Woods: Light underbrush n= 0.400 P2= 3.10" 0.5 43 0.0083 1.47 Shallow Concentrated Flow, Shallow 1 Unpaved Kv= 16.1 fps 18.3 93 Total Subcatchment E.1: Existing to BVW Hydrograph 1... 0.96 cfs ... ... —Runoff Type II1 24 hr 2 Year rainfall=3.18" Runoff Area�=43 990 sf Runoff Volume=4'390 cf Runoff Depth�=1.20" LL Flow Length=93' Shope=0.008 Tc=18.3 in GN ;77 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment P.1: Driveway to CB Runoff = 0.02 cfs @ 12.09 hrs, Volume= 73 cf, Depth= 2.95" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 298 98 Paved parking, HSG D 298 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.1: Driveway to CB Hydrograph 0.023, 0.022 0.021 0.02 cfs Runoff �... ---- ----- 00 4 Type' III 24-hr 0.018 -------- ... -- ---_- 0.017 'm 0.016. ------ YR:�anrc.Rffanf l . ie ..l.-.0.014 0.013 .1 "f....--- -_____ UhOff Volume 7 c# 0 0 011 n LL n�## Clepth-29 0.01 0.009;.. 0.008 Tc=6.q min 0.007 f Q 0.006 f-- ........................ .... .....LI V 0.005. 0.004. 0.003': - 0.002 -- 0.001!I 0'!! 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment P.2: Roof to Rain Garden Runoff = 0.49 cfs @ 12.09 hrs, Volume= 1,741 cf, Depth= 2.95" Routed to Pond ROOF : Roof to Scuppers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 7,089 98 Roofs, HSG D 7,089 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.2: Roof to Rain Garden Hydrograph 0.54. --.. 0.52 0.49 cfs -- —Runoff 05 ------------ 0.48 .. -- 0.46 Ty 11124 h r 0.44, 0.42 Year Rainfall+3::'18 _ 0.4. ---- ....................... 0.38 ---- 0.36 unp-ff re�-7,�89 sf... 0.34 ------ . -L-- 0.32 RuHoff VolpmO=Ftl4:1 ;cf w0 3 .. ............... �__ u 300..2282 _ -______ e© Dptl #0 0.26 � 1f . 9 a 0.24 -______ ... . Tc=6,k Min 0.18IY=g$ 0.16„ 0.14 0.12 0.1. 0.08 l .. ..... ...... ... 0.06'l.. ......... ------- , 0.04 ; 0.02 --- -------- -_{----. 0.. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment P.3: Detention Pond Runoff = 0.09 cfs @ 12.12 hrs, Volume= 330 cf, Depth= 0.97" Routed to Pond RES01 : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 4,082 73 Brush, Good, HSG D 4,082 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.7 50 0.0100 0.12 Sheet Flow, 50 Range n= 0.130 P2= 3.10" 0.5 50 0.0100 1.61 Shallow Concentrated Flow, Shallow Unpaved Kv= 16.1 fps 7.2 100 Total Subcatchment P.3: Detention Pond Hydrograph -----------. ---- ------- 0.1 0.09 cfs —Runoff 0.095. -------- , 0.85 1 TyOe 11! 24ihr 0.085. ... ------ ------- 0.08 ------ --- ----- ---------� 2 Year kainfa11-3.1;8" 0.075 . ------------------------- 0.07. +-------------------- -- -- -- , Run-off Area 4�082 sf- - Noo06 ; l undff Volume=330; Gf w =0.055 R noff Depth�=0.V 3a 0.05 ... 0 _0.045 ___ IoW Length=1 00'. 0.035 f Shope=0. 1.00 '/' T,C= In 0.0252 0 02 C N 73 0.015 .... 0.01 l .. -- 0.0051 .. ... 0.. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment PA Driveway to Forebay Runoff = 0.78 cfs @ 12.09 hrs, Volume= 2,649 cf, Depth= 2.73" Routed to Pond FBA : Forebay 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 1,387 80 >75% Grass cover, Good, HSG D 10,258 98 Paved parking, HSG D 11,645 96 Weighted Average 1,387 11.91% Pervious Area 10,258 88.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 50 0.0100 0.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.10" 0.4 50 0.0100 2.03 Shallow Concentrated Flow, shallow Paved Kv= 20.3 fps 4.7 Direct Entry, Min. Tc= 0.1h 6.0 100 Total Subcatchment PA: Driveway to Forebay Hydrograph 0.85 --- -- -- --. 0.78 cfs —Runoff 0.8 --- 'r 0.75 Type 11124 ihr 0.7 ------ .. ---- --------------- 0.65. ------ .............. ---2 Ybar .l-aihfaW=3.,18 �... .. .. . RunOff rea 11 '645 sf 0.6. 0.55 ---- -- -- -___ .. ' ______ w 0.5 Ruhoff-vol_ume=2,649, cf__ 0.45 ROno f Dept&2. 3 3 0 0.4IoW Length=10' LL 0.35 -__ ..... 0.25 Tc=6.0 min 0.2 J 0.15. CN 96 01 .. 0.05, .. -- --- ------------- 0..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment P.S: to BVW Runoff = 0.47 cfs @ 12.14 hrs, Volume= 1,719 cf, Depth= 1.14" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 4,438 73 Brush, Good, HSG D 13,689 77 Woods, Good, HSG D 18,127 76 Weighted Average 18,127 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 50 0.0050 0.09 Sheet Flow, Sheet 1 Range n= 0.130 P2= 3.10" Subcatchment P.5: to BVW Hydrograph ---- 0.5 0.47 cfs --- —Runoff 0.48 ... ... 0.46 . 0.44 --- ----- ---- Type 11 24+hC 0.42 -- -- -- + ---0.4 Year lkaih-ail 3.1,811__ 0.38 0.36 unoff Areas 8,+ 27 Sf. 0.34„ --- ----- .. ... 0.32 Ruhof( Vojume=1;719,c#.. rn 0.3 w o.2s ---- RU-noff Depth�1.1,4"' 0.26 LL 0:22 Flow Length= 0' . ..... 16pe=0.005 P 0.16 .. ..... Tc=p. in0.14 0.12 0.1 .. ---- o.os ....... DN-76. 0.06 -------- , 0.04. ------ --------- ------- 0.02 -------_-- 0.. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment P6: Replicated IVW Runoff = 0.07 cfs @ 12.10 hrs, Volume= 222 cf, Depth= 0.97" Routed to Pond REP1 : Replicated IVW Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2 Year Rainfall=3.18" Area (sf) CN Description 2,749 73 Brush, Good, HSG D 2,749 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc=0.1 h Subcatchment P6: Replicated IVW Hydrograph 0.07 0.07 cfs Runoff 0.065 0.06 tpe-III ;2 4-h"r 0.055 2. ear RinflIq1$ 0.05 -------- . ------ --------- --------- ... nofaea=2,749 sf---Ru 0.045 --------- ... ... -------------------------------- ---- ------------- 004 Runoff VQI_urrrie= 22 ,d... uno LL ff Der th O 9 !, !, 5 0.03 TC =6.0 min 0.025 A' 0.02 ........ N_ 0.015„ J 0.005'„ - ------- 0..: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 10 Summary for Pond F13.1: Forebay 1 Inflow Area = 11,645 sf, 88.09% Impervious, Inflow Depth = 2.73" for 2 Year event Inflow = 0.78 cfs @ 12.09 hrs, Volume= 2,649 cf Outflow = 0.75 cfs @ 12.10 hrs, Volume= 2,531 cf, Atten= 4%, Lag= 1.0 min Primary = 0.75 cfs @ 12.10 hrs, Volume= 2,531 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs/2 Peak Elev= 238.81' @ 12.10 hrs Surf.Area= 549 sf Storage= 171 cf Plug-Flow detention time= 44.9 min calculated for 2,531 cf(96% of inflow) Center-of-Mass det. time= 19.3 min ( 793.5- 774.2 ) Volume Invert Avail.Storage Storage Description #1 238.00' 319 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 238.00 125 0 0 238.67 225 117 117 239.00 1,000 202 319 Device Routing Invert Outlet Devices #1 Primary 238.67' 6.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=0.74 cfs @ 12.10 hrs HW=238.81' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 0.74 cfs @ 0.90 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 11 Pond FB.1: Forebay 1 Hydrograph 0.85 -- --- - -- --- - --- 0.78 cfs 0.8 0.75 cfs ... .. +- _ Inflo Primary 0.75 ------- -- - i . l.�. WA11 45 �f 0.7 __ --- 0.65, Iev=238- 81'n k 0.6 -_ 0.55 $t©rage=171 1Cf 0.5 -- -- N .� w I u 3 0 0 4 -------- LL I 0.35 .. ... --- ------- 4 0.3 -------- -------------- - 0.25 0.2 ________ ......... ------------------ 0.15 .. 01 0.05 .. ----- 0..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 12 Summary for Pond REP1: Replicated IVW Inflow Area = 2,749 sf, 0.00% Impervious, Inflow Depth = 0.97" for 2 Year event Inflow = 0.07 cfs @ 12.10 hrs, Volume= 222 cf Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0 cf, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 236.66' @ 24.40 hrs Surf.Area= 1,399 sf Storage= 222 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Description #1 236.50' 1,188 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,300 0 0 237.00 1,600 725 725 237.25 2,100 463 1,188 Device Routing Invert Outlet Devices #1 Primary 237.00' 10.0' long + 3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=236.50' (Free Discharge) L1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 13 Pond REP1: Replicated IVW Hydrograph 0.07 ---- -- ---- --- ---- Inflow 0.07 cfs Primary 0.065. 0.06 nflow_Air a=2,79 sf 8 0.055 eaC El@V- 0.045 J torage=222 f N u 0.04':; - 0 0.035 -------- -- --- --- ......... LL 0.03 -------- 0.025„ ------------------------------------------ 0.02„ ......... ... y........ ........_ -._._._._._._._._._--- ....... ....... .... 0.015 .. -----i--------------- 0.01. 0.005„ 0.: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 14 Summary for Pond RES01: Detention Pond Inflow Area = 22,816 sf, 76.03% Impervious, Inflow Depth = 2.42" for 2 Year event Inflow = 1.05 cfs @ 12.11 hrs, Volume= 4,602 cf Outflow = 0.51 cfs @ 12.41 hrs, Volume= 3,814 cf, Atten= 51%, Lag= 17.9 min Primary = 0.51 cfs @ 12.41 hrs, Volume= 3,814 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 237.51' @ 12.41 hrs Surf.Area= 2,083 sf Storage= 1,761 cf Plug-Flow detention time= 183.5 min calculated for 3,811 cf(83% of inflow) Center-of-Mass det. time= 112.9 min ( 917.5- 804.5 ) Volume Invert Avail.Storage Storage Description #1 236.50' 4,313 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,400 0 0 237.00 1,750 788 788 237.50 2,075 956 1,744 238.00 2,600 1,169 2,913 238.50 3,000 1,400 4,313 Device Routing Invert Outlet Devices #1 Primary 237.00' 8.0" Round Culvert L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 237.00' /236.85' S= 0.0050 '/' Cc= 0.900 n= 0.011, Flow Area= 0.35 sf #2 Primary 238.00' 8.0' long +3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.51 cfs @ 12.41 hrs HW=237.51' (Free Discharge) �__2= 1=Culvert (Barrel Controls 0.51 cfs @ 2.46 fps) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 15 Pond RES01: Detention Pond Hydrograph 1.05 cfs Inflow Primary 1... l hfl w �►re;a=22 16 sf eak Mev=237.$1 ' Stbrage=1 ,761 �f 0 1 0.51 cfs i 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 16 Summary for Pond ROOF: Roof to Scuppers Inflow Area = 7,089 sf,100.00% Impervious, Inflow Depth = 2.95" for 2 Year event Inflow = 0.49 cfs @ 12.09 hrs, Volume= 1,741 cf Outflow = 0.25 cfs @ 12.24 hrs, Volume= 1,741 cf, Atten= 50%, Lag= 9.1 min Primary = 0.25 cfs @ 12.24 hrs, Volume= 1,741 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 252.06' @ 12.24 hrs Surf.Area= 6,500 sf Storage= 413 cf Plug-Flow detention time= 51.9 min calculated for 1,740 cf(100% of inflow) Center-of-Mass det. time= 52.2 min ( 808.7- 756.5 ) Volume Invert Avail.Storage Storage Description #1 252.00' 3,250 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 252.00 6,500 0 0 252.50 6,500 3,250 3,250 Device Routing Invert Outlet Devices #1 Primary 252.00' 6.0" Horiz. Orifice/Grate X 3.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.25 cfs @ 12.24 hrs HW=252.06' (Free Discharge) t1=Orifice/Grate (Weir Controls 0.25 cfs @ 0.82 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 17 Pond ROOF: Roof to Scuppers Hydrograph 0.54 --------. 0.52 --- ----- Inflow 0.49 cfs 0.5 .. .. —Primary 0.48 0:44 infl w ►ra=7,09f 0.42 -------- ------------- ©© ©© (] El 0.36 .. pp. 0.34 sit 01 a.w./G-4 30 0.32 .. N u 0.3 ------ --- ------------- 0.28 3 0.25 cfs 0 0.26 -} --------- a0.24 -- --- ------ - --------- } ----------- ... --------- ---------- 0.22 ... 0.2. ---- ... ... -------- ----„ ... ... .. _____ 0.16 ________ ____ 0.14 ________ ---- -_........ ......... 0.12 f -------------- 0.1 0.06 - 0.04 .. 0.02 ......... 0.. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 2 Year Rainfall=3.18" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 18 Summary for Link DPA: Deisgn Point 1 Inflow Area = 43,990 sf, 40.11% Impervious, Inflow Depth = 1.53" for 2 Year event Inflow = 0.85 cfs @ 12.17 hrs, Volume= 5,606 cf Primary = 0.85 cfs @ 12.17 hrs, Volume= 5,606 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link DPA: Deisgn Point 1 Hydrograph 0.95"' 0.9 ------------- 0.85 cfs F 11fl-W 0.85 .. --- —Primary 0.8 ---. ------ Infl w IArea=439990 f .75. 0.7'„.. i___ 0.65 .. ---------- ---------------- ------------ 0.6 y 0.55 w 0 0.45. -------- - LL 0.4 ---- ------ ---- 0.35 -------- 0.3 0.25 -- ---- 0.2" ... 0.15 I . 01 0.05 .. ,...... _._._._ y 0.a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 19 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E.1: Existing to BVW Runoff Area=43,990 sf 0.00% Impervious Runoff Depth=2.66" Flow Length=93' Slope=0.0083 '/' Tc=18.3 min CN=77 Runoff=2.19 cfs 9,738 cf Subcatchment P.1: Driveway to CB Runoff Area=298 sf 100.00% Impervious Runoff Depth=4.80" Tc=6.0 min CN=98 Runoff=0.03 cfs 119 cf Subcatchment P.2: Roof to Rain Garden Runoff Area=7,089 sf 100.00% Impervious Runoff Depth=4.80" Tc=6.0 min CN=98 Runoff=0.78 cfs 2,837 cf Subcatchment P.3: Detention Pond Runoff Area=4,082 sf 0.00% Impervious Runoff Depth=2.31" Flow Length=100' Slope=0.0100 '/' Tc=7.2 min CN=73 Runoff=0.24 cfs 786 cf Subcatchment P.4: Driveway to Forebay Runoff Area=11,645 sf 88.09% Impervious Runoff Depth=4.57" Flow Length=100' Slope=0.0100 '/' Tc=6.0 min CN=96 Runoff=1.27 cfs 4,437 cf Subcatchment P.5: to BVW Runoff Area=18,127 sf 0.00% Impervious Runoff Depth=2.57" Flow Length=50' Slope=0.0050 '/' Tc=8.9 min CN=76 Runoff=1.11 cfs 3,880 cf Subcatchment P6: Replicated IVW Runoff Area=2,749 sf 0.00% Impervious Runoff Depth=2.31" Tc=6.0 min CN=73 Runoff=0.17 cfs 530 cf Pond FB.1: Forebay 1 Peak Elev=238.86' Storage=203 cf Inflow=1.27 cfs 4,437 cf Outflow=1.22 cfs 4,320 cf Pond REP1: Replicated IVW Peak Elev=236.87' Storage=530 cf Inflow=0.17 cfs 530 cf Outflow=0.00 cfs 0 cf Pond RES01: Detention Pond Peak Elev=237.82' Storage=2,465 cf Inflow=1.82 cfs 7,944 cf Outflow=0.93 cfs 7,155 cf Pond ROOF: Roof to Scuppers Peak Elev=252.09' Storage=599 cf Inflow=0.78 cfs 2,837 cf Outflow=0.43 cfs 2,837 cf Link DP.1: Deisgn Point 1 Inflow=1.93 cfs 11,154 cf Primary=1.93 cfs 11,154 cf Total Runoff Area = 87,980 sf Runoff Volume = 22,328 cf Average Runoff Depth = 3.05" 79.94% Pervious = 70,335 sf 20.06% Impervious = 17,645 sf 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment E.1: Existing to BVW Runoff = 2.19 cfs @ 12.26 hrs, Volume= 9,738 cf, Depth= 2.66" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 43,990 77 Woods, Good, HSG D 43,990 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.8 50 0.0083 0.05 Sheet Flow, Sheet Woods: Light underbrush n= 0.400 P2= 3.10" 0.5 43 0.0083 1.47 Shallow Concentrated Flow, Shallow 1 Unpaved Kv= 16.1 fps 18.3 93 Total Subcatchment E.1: Existing to BVW Hydrograph 2.19 cfs —Runoff 2... ....... Type. III 24ihr 0 Year Rainfall 5.014" Runoff Area�=43 990 sf Runoff Volume=9 738 cf 3 Runoff Depth�2.66" 0 LL FIQw Lenglth= 3' Slope=0.008 Te=18.3 in GN-77 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment P.1: Driveway to CB Runoff = 0.03 cfs @ 12.09 hrs, Volume= 119 cf, Depth= 4.80" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 298 98 Paved parking, HSG D 298 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.1: Driveway to CB Hydrograph 0.036 --- ... 0.034. 0.03 cfs .. —Runoff 0.032 - -- 0.03 ------- 1Ype 111 ;24- r 0.028 --------- 10-- ear R�infa11=5 0.024 -------- -- ---- ... --------kw h off'Area- 98 s f... 0.022 w 0.02. __ Runof VOlurrie= 19 cf o unOff epfh�4 80 a 0.016. ...T _ ....... 0.014;.. 1 Cir�V.-O..a��n 0.012 0.01. .. CN= 8 0.008. ......... 0.006. ,. ---- 0.004 0.002.. - -------- - ------- -------- 0..: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment P.2: Roof to Rain Garden Runoff = 0.78 cfs @ 12.09 hrs, Volume= 2,837 cf, Depth= 4.80" Routed to Pond ROOF : Roof to Scuppers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 7,089 98 Roofs, HSG D 7,089 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.2: Roof to Rain Garden Hydrograph 0.85 .... ... 0.78 cfs —Runoff 0.8 ... I 0.75 ---- -------- , Type III+ 24�hr 07 0.65 �.0 Year Rainfall--- 0.6 1#unpff area=7,089,sf... 0.55. -- . -- --- -- -- ---, N 0.5u roffol me=2, 37 i cf w 0.45 ------- 0.4 F�uoff Depth+48;0 LL 0.35 __ .. Tc=6,k rain ... .j 0.3 .. 0.25. ..... N=98 0.2. 0.15. ----- 01 0.05. ......... O..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 23 Summary for Subcatchment P.3: Detention Pond Runoff = 0.24 cfs @ 12.11 hrs, Volume= 786 cf, Depth= 2.31" Routed to Pond RES01 : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 4,082 73 Brush, Good, HSG D 4,082 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.7 50 0.0100 0.12 Sheet Flow, 50 Range n= 0.130 P2= 3.10" 0.5 50 0.0100 1.61 Shallow Concentrated Flow, Shallow Unpaved Kv= 16.1 fps 7.2 100 Total Subcatchment P.3: Detention Pond Hydrograph 0.26 ... ---- _Runoff 0.25 0.24 cfs _ w .... ---- 0.24 0.23 --- --- 4 0.22 ; .... Type III 24hr -- --- ---- °02 ---- 10 Year kainfall=5.04 0.19 J ------ 0.18 . Rup-off 4re =4,082 sf 0.17 0.16 -- V Runc f# Volume=786t Cf w 0.15 ---- - --- -- 0.14 R rnof# Depth*2.31 3 0.13 LL 0.11:::::: 1ovir Length=l b0' 0.09 Slope=0.( 1 Oa '/' 0.08 0.07„ Tc=7.2 in 0.06. 0.05 -- CN 73 . 0.04 ......... ......... ......... .... ......... 0.02„.. --------- 0' 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 24 Summary for Subcatchment PA Driveway to Forebay Runoff = 1.27 cfs @ 12.09 hrs, Volume= 4,437 cf, Depth= 4.57" Routed to Pond FBA : Forebay 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 1,387 80 >75% Grass cover, Good, HSG D 10,258 98 Paved parking, HSG D 11,645 96 Weighted Average 1,387 11.91% Pervious Area 10,258 88.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 50 0.0100 0.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.10" 0.4 50 0.0100 2.03 Shallow Concentrated Flow, shallow Paved Kv= 20.3 fps 4.7 Direct Entry, Min. Tc= 0.1h 6.0 100 Total Subcatchment PA: Driveway to Forebay Hydrograph 1.27 cfs —Runoff Type III 24hr 10 Year Raififa11=5.04" 1... ... Runoff Area*11�645 sf . Runoff VoMume=4437 cf 3 Runoff Depth 07" 0 LL flow Length=100' Sope=0.0100 '/' Tc=6.0 in CN 96 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment P.S: to BVW Runoff = 1.11 cfs @ 12.13 hrs, Volume= 3,880 cf, Depth= 2.57" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 4,438 73 Brush, Good, HSG D 13,689 77 Woods, Good, HSG D 18,127 76 Weighted Average 18,127 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 50 0.0050 0.09 Sheet Flow, Sheet 1 Range n= 0.130 P2= 3.10" Subcatchment P.5: to BVW Hydrograph 1.11 cfs —Runoff 1 ----- Type II1 24ihr 10 Year Rainfall 5.04" kunoff Area=18 127 Sf Runoff VoIume=3,,,"8801 cf 3 Runoff 13epthc2.57" 0 LL Flow Len6th=$0' Slope=0.005 Tc=8.9 in CN-76 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 26 Summary for Subcatchment P6: Replicated IVW Runoff = 0.17 cfs @ 12.10 hrs, Volume= 530 cf, Depth= 2.31" Routed to Pond REP1 : Replicated IVW Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10 Year Rainfall=5.04" Area (sf) CN Description 2,749 73 Brush, Good, HSG D 2,749 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc=0.1 h Subcatchment P6: Replicated IVW Hydrograph 0.18 -- ------------ - 0.17 cfs —Runoff - ---- 0.16 T......„„e �11 24- 1 0.15. 1 ,..---- ----- 0.14 10 M'eaf R�infall� 0.13. ------ - ... -----_ 0.12 ------ - --- --------. R6 no#f A lea#2... -7 49 S#- -- 0.11 0.1 .. A u.rtoff VO _ume_= 30 ;cf.. 3 0.09 LL 0.08 unff �epith�2I" 0.07 Tc=6.0 _min 0.06 0.05. ..... ......... ... G N= 3 0.04. 0.03. ......... ------ 0.02 ----------- 0.01 ------------- 0..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 27 Summary for Pond F13.1: Forebay 1 Inflow Area = 11,645 sf, 88.09% Impervious, Inflow Depth = 4.57" for 10 Year event Inflow = 1.27 cfs @ 12.09 hrs, Volume= 4,437 cf Outflow = 1.22 cfs @ 12.10 hrs, Volume= 4,320 cf, Atten= 4%, Lag= 1.0 min Primary = 1.22 cfs @ 12.10 hrs, Volume= 4,320 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs/2 Peak Elev= 238.86' @ 12.10 hrs Surf.Area= 673 sf Storage= 203 cf Plug-Flow detention time= 30.9 min calculated for 4,317 cf(97% of inflow) Center-of-Mass det. time= 14.6 min ( 776.8- 762.2 ) Volume Invert Avail.Storage Storage Description #1 238.00' 319 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 238.00 125 0 0 238.67 225 117 117 239.00 1,000 202 319 Device Routing Invert Outlet Devices #1 Primary 238.67' 6.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=1.21 cfs @ 12.10 hrs HW=238.86' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.21 cfs @ 1.06 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 28 Pond FB.1: Forebay 1 Hydrograph 1.27 cfs Inflow 1.22 cfs —Primary of I w Area=11 , 45 f elk Lev=2 ,&46' Storage=203 pf LL 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 111 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 29 Summary for Pond REP1: Replicated IVW Inflow Area = 2,749 sf, 0.00% Impervious, Inflow Depth = 2.31" for 10 Year event Inflow = 0.17 cfs @ 12.10 hrs, Volume= 530 cf Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0 cf, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 236.87' @ 24.40 hrs Surf.Area= 1,525 sf Storage= 530 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Description #1 236.50' 1,188 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,300 0 0 237.00 1,600 725 725 237.25 2,100 463 1,188 Device Routing Invert Outlet Devices #1 Primary 237.00' 10.0' long + 3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=236.50' (Free Discharge) L1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 30 Pond REP1: Replicated IVW Hydrograph 0.18 0.17 cfs Inflow 0.17 - +--- ----- ---- } ------ _Primary 0.16 0.15 7111 Ar, a=, 71T / f 0.14 eat: Elev=23"5.87'.... 0.13. 0.12 StCyrag0=530 f 0.11. ..... .... --- N 3 0.09. -- ---- - --------- }--------- 0 LL ....... ......... ......... ... .... 0.07 -------- -------- ... 0.06 0.05 ________ .. ... ... 0.04.__ ......... ,_________ 0.03. ......... ......... 0.02 . 0.01 .. .. ----------. O..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type 111 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 31 Summary for Pond RES01: Detention Pond Inflow Area = 22,816 sf, 76.03% Impervious, Inflow Depth = 4.18" for 10 Year event Inflow = 1.82 cfs @ 12.11 hrs, Volume= 7,944 cf Outflow = 0.93 cfs @ 12.37 hrs, Volume= 7,155 cf, Atten= 49%, Lag= 15.6 min Primary = 0.93 cfs @ 12.37 hrs, Volume= 7,155 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 237.82' @ 12.37 hrs Surf.Area= 2,413 sf Storage= 2,465 cf Plug-Flow detention time= 135.8 min calculated for 7,150 cf(90% of inflow) Center-of-Mass det. time= 86.8 min ( 875.7- 788.9 ) Volume Invert Avail.Storage Storage Description #1 236.50' 4,313 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,400 0 0 237.00 1,750 788 788 237.50 2,075 956 1,744 238.00 2,600 1,169 2,913 238.50 3,000 1,400 4,313 Device Routing Invert Outlet Devices #1 Primary 237.00' 8.0" Round Culvert L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 237.00' /236.85' S= 0.0050 '/' Cc= 0.900 n= 0.011, Flow Area= 0.35 sf #2 Primary 238.00' 8.0' long +3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.93 cfs @ 12.37 hrs HW=237.82' (Free Discharge) �__2= 1=Culvert (Inlet Controls 0.93 cfs @ 2.65 fps) Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 32 Pond RES01: Detention Pond Hydrograph 2... ----- ----- --------- ------ ... 1.82 cfs Inflow —Primary Infl w Q►rea=22,816 0 eak Oev,237.82' Stbrage=2A65 pf V 3 1.... F 0.93 cfs ----- ------ ..... .. p LL 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 111 24-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 33 Summary for Pond ROOF: Roof to Scuppers Inflow Area = 7,089 sf,100.00% Impervious, Inflow Depth = 4.80" for 10 Year event Inflow = 0.78 cfs @ 12.09 hrs, Volume= 2,837 cf Outflow = 0.43 cfs @ 12.22 hrs, Volume= 2,837 cf, Atten= 45%, Lag= 7.9 min Primary = 0.43 cfs @ 12.22 hrs, Volume= 2,837 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 252.09' @ 12.22 hrs Surf.Area= 6,500 sf Storage= 599 cf Plug-Flow detention time= 45.9 min calculated for 2,837 cf(100% of inflow) Center-of-Mass det. time= 45.2 min ( 793.0- 747.9 ) Volume Invert Avail.Storage Storage Description #1 252.00' 3,250 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 252.00 6,500 0 0 252.50 6,500 3,250 3,250 Device Routing Invert Outlet Devices #1 Primary 252.00' 6.0" Horiz. Orifice/Grate X 3.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.43 cfs @ 12.22 hrs HW=252.09' (Free Discharge) t1=Orifice/Grate (Weir Controls 0.43 cfs @ 0.99 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 34 Pond ROOF: Roof to Scuppers Hydrograph --- ---- --- ----- 0.78 cfs ... 0.8 Inflow Primary I'r 1 0.7 w `Aria=7 . . 0.65 eac Eev-252.0 ' 0 6.... ......... 0.55 Sltorage=599f 0 5 .. ... y -.-.--'-'- r , v.. u 0.45. 0.43 cfs T------------ 3 , 0 0.4 ---- LL I 0.35 0.25 ________ 0.2 ________ 0.15 .. 0.1. ......... .......... 0.05 ------ O..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 10 Year Rainfall=5.04" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 35 Summary for Link DPA: Deisgn Point 1 Inflow Area = 43,990 sf, 40.11% Impervious, Inflow Depth = 3.04" for 10 Year event Inflow = 1.93 cfs @ 12.15 hrs, Volume= 11,154 cf Primary = 1.93 cfs @ 12.15 hrs, Volume= 11,154 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link DPA: Deisgn Point 1 Hydrograph 2... 1.93 cfs F Inflow Primary Infl w A' rea=43,990 f 3 o ,__ LL 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 36 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E.1: Existing to BVW Runoff Area=43,990 sf 0.00% Impervious Runoff Depth=3.65" Flow Length=93' Slope=0.0083 '/' Tc=18.3 min CN=77 Runoff=3.02 cfs 13,396 cf Subcatchment P.1: Driveway to CB Runoff Area=298 sf 100.00% Impervious Runoff Depth=5.96" Tc=6.0 min CN=98 Runoff=0.04 cfs 148 cf Subcatchment P.2: Roof to Rain Garden Runoff Area=7,089 sf 100.00% Impervious Runoff Depth=5.96" Tc=6.0 min CN=98 Runoff=0.97 cfs 3,522 cf Subcatchment P.3: Detention Pond Runoff Area=4,082 sf 0.00% Impervious Runoff Depth=3.26" Flow Length=100' Slope=0.0100 '/' Tc=7.2 min CN=73 Runoff=0.34 cfs 1,107 cf Subcatchment P.4: Driveway to Forebay Runoff Area=11,645 sf 88.09% Impervious Runoff Depth=5.73" Flow Length=100' Slope=0.0100 '/' Tc=6.0 min CN=96 Runoff=1.57 cfs 5,557 cf Subcatchment P.5: to BVW Runoff Area=18,127 sf 0.00% Impervious Runoff Depth=3.55" Flow Length=50' Slope=0.0050 '/' Tc=8.9 min CN=76 Runoff=1.54 cfs 5,368 cf Subcatchment P6: Replicated IVW Runoff Area=2,749 sf 0.00% Impervious Runoff Depth=3.26" Tc=6.0 min CN=73 Runoff=0.24 cfs 746 cf Pond FB.1: Forebay 1 Peak Elev=238.89' Storage=223 cf Inflow=1.57 cfs 5,557 cf Outflow=1.51 cfs 5,440 cf Pond REP1: Replicated IVW Peak EIev=237.00' Storage=729 cf Inflow=0.24 cfs 746 cf Outflow=0.00 cfs 21 cf Pond RES01: Detention Pond Peak EIev=238.01' Storage=2,941 cf Inflow=2.32 cfs 10,069 cf Outflow=1.12 cfs 9,280 cf Pond ROOF: Roof to Scuppers Peak EIev=252.11' Storage=705 cf Inflow=0.97 cfs 3,522 cf Outflow=0.55 cfs 3,522 cf Link DP.1: Deisgn Point 1 Inflow=2.50 cfs 14,817 cf Primary=2.50 cfs 14,817 cf Total Runoff Area = 87,980 sf Runoff Volume = 29,844 cf Average Runoff Depth = 4.07" 79.94% Pervious = 70,335 sf 20.06% Impervious = 17,645 sf 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 37 Summary for Subcatchment E.1: Existing to BVW Runoff = 3.02 cfs @ 12.25 hrs, Volume= 13,396 cf, Depth= 3.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 43,990 77 Woods, Good, HSG D 43,990 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.8 50 0.0083 0.05 Sheet Flow, Sheet Woods: Light underbrush n= 0.400 P2= 3.10" 0.5 43 0.0083 1.47 Shallow Concentrated Flow, Shallow 1 Unpaved Kv= 16.1 fps 18.3 93 Total Subcatchment E.1: Existing to BVW Hydrograph 3.02 cfs —Runoff 3... Type II1 24 hr 25 Year RainfalP=6.Z0 kunoff Area�=43�990 Sf 2... Ru n off-Volu-me 13 396' cf- w Rwnoff Depth�=3.65" LL Flow Len4th=93' Slope=0.008 1... .........................._ Tc=18.3 in GN-77 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 38 Summary for Subcatchment P.1: Driveway to CB Runoff = 0.04 cfs @ 12.09 hrs, Volume= 148 cf, Depth= 5.96" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 298 98 Paved parking, HSG D 298 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.1: Driveway to CB Hydrograph 0.044 0.042. 0.04 cfs —Runoff 0.04 0.038 ---- rtype III 24-hr 0.036 ---- ., -------- c pr� c n 0.034 5- Year Rp�nfa11�6.2U" 0.032 --- --_t---- ... ----- 0.03 unoff�Are-a= 8 sf... 0.028. ---- - --- .. ---- .------ 'm 0.026 w Runoff Volume-148 0--- 0.024. ----------------------- .. 3 0.022 Fkunoff Depth#596., 0 M 0.02. �+ , 0.018 TC-6.� ml 0.016. . 0.014 CN= 8 V 0.012. 0.01. 0.008. 0.006,' -- - ---------- 0.004 - -- ......... 0.002 ,-------- 0'!! 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment P.2: Roof to Rain Garden Runoff = 0.97 cfs @ 12.09 hrs, Volume= 3,522 cf, Depth= 5.96" Routed to Pond ROOF : Roof to Scuppers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 7,089 98 Roofs, HSG D 7,089 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.2: Roof to Rain Garden Hydrograph 1... 0.97 cfs —Runoff ;Type III; 24�hr 2 Year Rainfall=6.20" unoff Area' =7,p89 sf V Runoff Vo I U m 6=3,5221 cf Runoff Depth=5.96" LL T+c=60 niin CN=J8 0.... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 40 Summary for Subcatchment P.3: Detention Pond Runoff = 0.34 cfs @ 12.11 hrs, Volume= 1,107 cf, Depth= 3.26" Routed to Pond RES01 : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 4,082 73 Brush, Good, HSG D 4,082 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.7 50 0.0100 0.12 Sheet Flow, 50 Range n= 0.130 P2= 3.10" 0.5 50 0.0100 1.61 Shallow Concentrated Flow, Shallow Unpaved Kv= 16.1 fps 7.2 100 Total Subcatchment P.3: Detention Pond Hydrograph 0.36 0.34 cfs Runoff 0.34 0.32 ;.Type HI 24m hr. 0.3 .. _ - 0.28. ZrJ Y eau Rai nfal��-6-.Z0".. --- R 0.26. urioff Area-408 f 0.24 ,__ .. ... _ 0.22 Ruhoff-Yolume=1,,107; cf w 0.2 R0-no Depth=3.26 0 0.18 LL IoW Le, ngth-100' 0.14 Slope=0. 10� '/' 0.12. 0.1 1. C TO in 0.08 N 73.. 0.06. .... - 0.04'„.. ------- 0..a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 41 Summary for Subcatchment PA Driveway to Forebay Runoff = 1.57 cfs @ 12.09 hrs, Volume= 5,557 cf, Depth= 5.73" Routed to Pond FBA : Forebay 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 1,387 80 >75% Grass cover, Good, HSG D 10,258 98 Paved parking, HSG D 11,645 96 Weighted Average 1,387 11.91% Pervious Area 10,258 88.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 50 0.0100 0.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.10" 0.4 50 0.0100 2.03 Shallow Concentrated Flow, shallow Paved Kv= 20.3 fps 4.7 Direct Entry, Min. Tc= 0.1h 6.0 100 Total Subcatchment PA: Driveway to Forebay Hydrograph 1.57 cfs —Runoff Type III 24hr 25 Year Raih, fa11=6.210' RunOf Area*11�645! sf 1... RunQf VoMume=5557+ f U 3 Rlanof Depthc5.T3" 0 LL flow Length=100' Sope=0.0100 '/' Tc=6.0 in CN 96 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 42 Summary for Subcatchment P.S: to BVW Runoff = 1.54 cfs @ 12.13 hrs, Volume= 5,368 cf, Depth= 3.55" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 4,438 73 Brush, Good, HSG D 13,689 77 Woods, Good, HSG D 18,127 76 Weighted Average 18,127 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 50 0.0050 0.09 Sheet Flow, Sheet 1 Range n= 0.130 P2= 3.10" Subcatchment P.5: to BVW Hydrograph 1.54 cfs —Runoff Type III 24hr 25 Ybar Rainfall 6.20" Runoff Area=18 127 sf N 1... Run-off Vol ume=5 368; cf 3 Runoff 1)epthc=155" LL0 Flow Len6th=$0' Slop e=0.p05 Tc=8.9 in CN-76 0 7- 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment P6: Replicated IVW Runoff = 0.24 cfs @ 12.09 hrs, Volume= 746 cf, Depth= 3.26" Routed to Pond REP1 : Replicated IVW Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 25 Year Rainfall=6.20" Area (sf) CN Description 2,749 73 Brush, Good, HSG D 2,749 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc=0.1 h Subcatchment P6: Replicated IVW Hydrograph --. . ----------t ..j.. _Runoff 0.25 0.124 0.24 I.. 0.23 0.22 Type III 24 0.21 --0.2 5 'r(ea R� nf611#6 2n1v 0.19 ... 0.18 -- 0.17 -- --- RUno f Area=�,7 sf---- 0.16 --+ - ku-n' off`,Vo urr e=746 d 'm 0.15 0.14 ---- 0.13 3 unnO Depth 3 26„ LL 0.11 ------------- 0.09... G!= . m;i n 0 . 0.08.07. N 0.06. 0.05 0.04. ......... ------ 0.03 0.02 .. ----------------- 0.01 ------- a .... 0.. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 44 Summary for Pond F13.1: Forebay 1 Inflow Area = 11,645 sf, 88.09% Impervious, Inflow Depth = 5.73" for 25 Year event Inflow = 1.57 cfs @ 12.09 hrs, Volume= 5,557 cf Outflow = 1.51 cfs @ 12.10 hrs, Volume= 5,440 cf, Atten= 4%, Lag= 1.0 min Primary = 1.51 cfs @ 12.10 hrs, Volume= 5,440 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs/2 Peak Elev= 238.89' @ 12.10 hrs Surf.Area= 740 sf Storage= 223 cf Plug-Flow detention time= 26.5 min calculated for 5,440 cf(98% of inflow) Center-of-Mass det. time= 12.7 min ( 770.2- 757.5 ) Volume Invert Avail.Storage Storage Description #1 238.00' 319 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 238.00 125 0 0 238.67 225 117 117 239.00 1,000 202 319 Device Routing Invert Outlet Devices #1 Primary 238.67' 6.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=1.50 cfs @ 12.10 hrs HW=238.89' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.50 cfs @ 1.15 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 45 Pond FB.1: Forebay 1 Hydrograph 1.57 Is Inflow 1.51 cfs —Primary of I w Q►rea=11 , 45f eak Mev 2 8.89' Storage=223 �f 1... ... O LL 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type /// 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 46 Summary for Pond REP1: Replicated IVW Inflow Area = 2,749 sf, 0.00% Impervious, Inflow Depth = 3.26" for 25 Year event Inflow = 0.24 cfs @ 12.09 hrs, Volume= 746 cf Outflow = 0.00 cfs @ 23.41 hrs, Volume= 21 cf, Atten= 99%, Lag= 679.1 min Primary = 0.00 cfs @ 23.41 hrs, Volume= 21 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 237.00' @ 23.41 hrs Surf.Area= 1,605 sf Storage= 729 cf Plug-Flow detention time= 812.2 min calculated for 21 cf(3% of inflow) Center-of-Mass det. time= 581.4 min ( 1,411.0- 829.7 ) Volume Invert Avail.Storage Storage Description #1 236.50' 1,188 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,300 0 0 237.00 1,600 725 725 237.25 2,100 463 1,188 Device Routing Invert Outlet Devices #1 Primary 237.00' 10.0' long + 3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.00 cfs @ 23.41 hrs HW=237.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 0.00 cfs @ 0.12 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 47 Pond REP1: Replicated IVW Hydrograph 0.26 --- 0.25 0.24 cfs ----- Inflow 0.24 -- - --- —Primary 0.23 - -- - 0.22 nfl w TAr , a=2,7A�9 f 0.21. - ... 0.19 _ eac E ev=237U0' 0.18, �y 0.16. ------ tora =729 f 0.17 --- w 0.14! . 0 0.12 --------- } ---------- --------- ---------- a0.11 . ... -------- -------- ---------7 ... ............................ 0.1 ..., - 0.09 pp 0.07Ij _._ y....... _._ y......... ......._ ........_ -._._._._._._._._. 0.06 ... 0.05 0.04 0.030.02 --.0.01 ------ 0.00 cfs J, 0.1 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 48 Summary for Pond RES01: Detention Pond Inflow Area = 22,816 sf, 76.03% Impervious, Inflow Depth = 5.30" for 25 Year event Inflow = 2.32 cfs @ 12.11 hrs, Volume= 10,069 cf Outflow = 1.12 cfs @ 12.39 hrs, Volume= 9,280 cf, Atten= 52%, Lag= 16.7 min Primary = 1.12 cfs @ 12.39 hrs, Volume= 9,280 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 238.01' @ 12.39 hrs Surf.Area= 2,609 sf Storage= 2,941 cf Plug-Flow detention time= 120.2 min calculated for 9,274 cf(92% of inflow) Center-of-Mass det. time= 79.2 min ( 861.9- 782.7 ) Volume Invert Avail.Storage Storage Description #1 236.50' 4,313 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,400 0 0 237.00 1,750 788 788 237.50 2,075 956 1,744 238.00 2,600 1,169 2,913 238.50 3,000 1,400 4,313 Device Routing Invert Outlet Devices #1 Primary 237.00' 8.0" Round Culvert L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 237.00' /236.85' S= 0.0050 '/' Cc= 0.900 n= 0.011, Flow Area= 0.35 sf #2 Primary 238.00' 8.0' long +3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=1.11 cfs @ 12.39 hrs HW=238.01' (Free Discharge) �__2= 1=Culvert (Inlet Controls 1.09 cfs @ 3.13 fps) Broad-Crested Rectangular Weir (Weir Controls 0.02 cfs @ 0.24 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 49 Pond RES01: Detention Pond Hydrograph 2.32 cfs 1—inflow Primary Infl w Are,a=22, 16 sf 2... e6k bev=2 8.0,1 ' Storage=2,941 pf 0 1.12 cfs LL 1.... i 0.... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 50 Summary for Pond ROOF: Roof to Scuppers Inflow Area = 7,089 sf,100.00% Impervious, Inflow Depth = 5.96" for 25 Year event Inflow = 0.97 cfs @ 12.09 hrs, Volume= 3,522 cf Outflow = 0.55 cfs @ 12.21 hrs, Volume= 3,522 cf, Atten= 43%, Lag= 7.5 min Primary = 0.55 cfs @ 12.21 hrs, Volume= 3,522 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 252.11' @ 12.21 hrs Surf.Area= 6,500 sf Storage= 705 cf Plug-Flow detention time= 42.1 min calculated for 3,519 cf(100% of inflow) Center-of-Mass det. time= 42.3 min ( 787.0- 744.7 ) Volume Invert Avail.Storage Storage Description #1 252.00' 3,250 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 252.00 6,500 0 0 252.50 6,500 3,250 3,250 Device Routing Invert Outlet Devices #1 Primary 252.00' 6.0" Horiz. Orifice/Grate X 3.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.55 cfs @ 12.21 hrs HW=252.11' (Free Discharge) t1=Orifice/Grate (Weir Controls 0.55 cfs @ 1.08 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 51 Pond ROOF: Roof to Scuppers Hydrograph 1... 0.97 cfs ----- -------- ... .. ------ ----- ------- --------- Inflow —Primary nfl i w Area=79089 0 Peak bev=25:2.11 ' Storage=705 Pf w 0.55 cfs 0 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type 11124-hr 25 Year Rainfall=6.20" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 52 Summary for Link DPA: Deisgn Point 1 Inflow Area = 43,990 sf, 40.11% Impervious, Inflow Depth = 4.04" for 25 Year event Inflow = 2.50 cfs @ 12.14 hrs, Volume= 14,817 cf Primary = 2.50 cfs @ 12.14 hrs, Volume= 14,817 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link DPA: Deisgn Point 1 Hydrograph 2.50 cfs F Inflow Primary Inflow a4rea=43,990 f 2... ......... LL 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 53 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E.1: Existing to BVW Runoff Area=43,990 sf 0.00% Impervious Runoff Depth=5.27" Flow Length=93' Slope=0.0083 '/' Tc=18.3 min CN=77 Runoff=4.32 cfs 19,301 cf Subcatchment P.1: Driveway to CB Runoff Area=298 sf 100.00% Impervious Runoff Depth=7.75" Tc=6.0 min CN=98 Runoff=0.05 cfs 192 cf Subcatchment P.2: Roof to Rain Garden Runoff Area=7,089 sf 100.00% Impervious Runoff Depth=7.75" Tc=6.0 min CN=98 Runoff=1.25 cfs 4,578 cf Subcatchment P.3: Detention Pond Runoff Area=4,082 sf 0.00% Impervious Runoff Depth=4.80" Flow Length=100' Slope=0.0100 '/' Tc=7.2 min CN=73 Runoff=0.50 cfs 1,633 cf Subcatchment P.4: Driveway to Forebay Runoff Area=11,645 sf 88.09% Impervious Runoff Depth=7.51" Flow Length=100' Slope=0.0100 '/' Tc=6.0 min CN=96 Runoff=2.03 cfs 7,289 cf Subcatchment P.5: to BVW Runoff Area=18,127 sf 0.00% Impervious Runoff Depth=5.15" Flow Length=50' Slope=0.0050 '/' Tc=8.9 min CN=76 Runoff=2.22 cfs 7,778 cf Subcatchment P6: Replicated IVW Runoff Area=2,749 sf 0.00% Impervious Runoff Depth=4.80" Tc=6.0 min CN=73 Runoff=0.35 cfs 1,100 cf Pond FB.1: Forebay 1 Peak Elev=238.93' Storage=254 cf Inflow=2.03 cfs 7,289 cf Outflow=1.96 cfs 7,171 cf Pond REP1: Replicated IVW Peak EIev=237.01' Storage=741 cf Inflow=0.35 cfs 1,100 cf Outflow=0.02 cfs 375 cf Pond RES01: Detention Pond Peak EIev=238.13' Storage=3,262 cf Inflow=3.09 cfs 13,383 cf Outflow=2.13 cfs 12,594 cf Pond ROOF: Roof to Scuppers Peak EIev=252.13' Storage=859 cf Inflow=1.25 cfs 4,578 cf Outflow=0.74 cfs 4,578 cf Link DP.1: Deisgn Point 1 Inflow=3.85 cfs 20,939 cf Primary=3.85 cfs 20,939 cf Total Runoff Area = 87,980 sf Runoff Volume =41,872 cf Average Runoff Depth = 5.71" 79.94% Pervious = 70,335 sf 20.06% Impervious = 17,645 sf 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 54 Summary for Subcatchment E.1: Existing to BVW Runoff = 4.32 cfs @ 12.25 hrs, Volume= 19,301 cf, Depth= 5.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 43,990 77 Woods, Good, HSG D 43,990 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.8 50 0.0083 0.05 Sheet Flow, Sheet Woods: Light underbrush n= 0.400 P2= 3.10" 0.5 43 0.0083 1.47 Shallow Concentrated Flow, Shallow 1 Unpaved Kv= 16.1 fps 18.3 93 Total Subcatchment E.1: Existing to BVW Hydrograph 4.32 cfs —Runoff 4. Type I11 24*hr 1130 Year Rainfall' 7.99" - Runoff Area=43z990 sf _ 3. Ru off 11/olume=19301 cf. w Runoff Depth�=5.27" 3 2. o LL Flow Len4th_= 3' Slope=0.008 Tc=18.3 in 1... ---- GN- 7. 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 55 Summary for Subcatchment P.1: Driveway to CB Runoff = 0.05 cfs @ 12.09 hrs, Volume= 192 cf, Depth= 7.75" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 298 98 Paved parking, HSG D 298 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.1: Driveway to CB Hydrograph 0.055:, 0.05 cfs -- —Runoff 0.05 -------- -- ryp lIr4 r 0.045 -------- - --------- n OQ Year Fainfa117:9� 0.04 ------ -------- --------- Ruh- -Area=298 V--- 0.035 .. --------- --------- ------ w RUInoff Volume "I92 cf 0.03 p f 3 R uof epthy7.7 0 LL TC=6 0---Irri i n 0.02 .. CN= 8. 0.015 0.01 -- ------------ - -- 0..: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 56 Summary for Subcatchment P.2: Roof to Rain Garden Runoff = 1.25 cfs @ 12.09 hrs, Volume= 4,578 cf, Depth= 7.75" Routed to Pond ROOF : Roof to Scuppers Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 7,089 98 Roofs, HSG D 7,089 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc= 0.1h Subcatchment P.2: Roof to Rain Garden Hydrograph 1.25 cfs —Runoff ;Type IN 24�hr 10 Year Rainfall+7.99" Runoff Area=7,p89sf V ',Runoff,VOIUM6=4,578 cf Runoff De: th+7.75" LL T+c=60 min CN=J8 0.... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 57 Summary for Subcatchment P.3: Detention Pond Runoff = 0.50 cfs @ 12.11 hrs, Volume= 1,633 cf, Depth= 4.80" Routed to Pond RES01 : Detention Pond Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 4,082 73 Brush, Good, HSG D 4,082 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.7 50 0.0100 0.12 Sheet Flow, 50 Range n= 0.130 P2= 3.10" 0.5 50 0.0100 1.61 Shallow Concentrated Flow, Shallow Unpaved Kv= 16.1 fps 7.2 100 Total Subcatchment P.3: Detention Pond Hydrograph 0.55 --------- -------- 0.50 cfs — Runoff 0.5 , 0.45 -_ -- Type Ili 24ihr 100 Year kainfall4.99" 0.4„ ------- -------- ---------. ;Runoff 4re�=4 082 sf 0.35 --------- , ... Ruhc Volume=1 y �I'633 cf u 0.3 ------------- 3 Runoff Depth=4.30" 025 gth 1ovi Len ='I 01 0.2 --- ------- Slope=0.010b '/' A......... ......... _«-.. ,........ 0.15 Tc=7,2A.' in 0.1„ IV 73 0.05.::.. ... I 0: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 58 Summary for Subcatchment PA Driveway to Forebay Runoff = 2.03 cfs @ 12.09 hrs, Volume= 7,289 cf, Depth= 7.51" Routed to Pond FBA : Forebay 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 1,387 80 >75% Grass cover, Good, HSG D 10,258 98 Paved parking, HSG D 11,645 96 Weighted Average 1,387 11.91% Pervious Area 10,258 88.09% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 50 0.0100 0.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.10" 0.4 50 0.0100 2.03 Shallow Concentrated Flow, shallow Paved Kv= 20.3 fps 4.7 Direct Entry, Min. Tc= 0.1h 6.0 100 Total Subcatchment PA: Driveway to Forebay Hydrograph 2.03 cfs —Runoff 2... ......... Type III 24�hr 100 Year Rainfall 7.99" Fundff Area11645 sf Runoff Volume=7,,,"2891 cf 3 Runoff Depth=7T$1" 0 LL Flo Length=400' Slope=0.0100 '/' Tc=6.0 in CN 96 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 59 Summary for Subcatchment P.S: to BVW Runoff = 2.22 cfs @ 12.13 hrs, Volume= 7,778 cf, Depth= 5.15" Routed to Link DP.1 : Deisgn Point 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 4,438 73 Brush, Good, HSG D 13,689 77 Woods, Good, HSG D 18,127 76 Weighted Average 18,127 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 50 0.0050 0.09 Sheet Flow, Sheet 1 Range n= 0.130 P2= 3.10" Subcatchment P.5: to BVW Hydrograph 2.22 cfs —Runoff 2 Type III.24ihr 1 00 Year kai6fall=7.99" Run(* Area=18'127 sf t Runoff VoIume=7,,,"7781 cf 3 Runoff Depthc5.15" 0 LL Flow Length=60' 1 Sope=0.005 Tc=8.9 in CN-76 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 60 Summary for Subcatchment P6: Replicated IVW Runoff = 0.35 cfs @ 12.09 hrs, Volume= 1,100 cf, Depth= 4.80" Routed to Pond REP1 : Replicated IVW Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100 Year Rainfall=7.99" Area (sf) CN Description 2,749 73 Brush, Good, HSG D 2,749 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min. Tc=0.1 h Subcatchment P6: Replicated IVW Hydrograph 0.38 .............. 0.36. 0.35 cfs --- —Runoff 0.34 ..... --- a Type lll+ 24�hr 0.32 0.3 0.28. ... --- --------- --------- 0( Year Fainfall+7.99 0.26 ------ ----Run ff--Ares=2,749 sf... Runoff'm 0.2z. I—olume=1 ,1-00 cf 0.z 3 Ruof Depth+4 $;0 0 0.18 .... LL 0.16 ________ Tc=6.0 niin 0.14 f A___ 0.12 .. C N-=73 01 L 0.08. 0.06. 0.04 .. 0.02 .. --- -------- 0..i 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 61 Summary for Pond F13.1: Forebay 1 Inflow Area = 11,645 sf, 88.09% Impervious, Inflow Depth = 7.51" for 100 Year event Inflow = 2.03 cfs @ 12.09 hrs, Volume= 7,289 cf Outflow = 1.96 cfs @ 12.10 hrs, Volume= 7,171 cf, Atten= 4%, Lag= 1.0 min Primary = 1.96 cfs @ 12.10 hrs, Volume= 7,171 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs/2 Peak Elev= 238.93' @ 12.10 hrs Surf.Area= 832 sf Storage= 254 cf Plug-Flow detention time= 21.1 min calculated for 7,171 cf(98% of inflow) Center-of-Mass det. time= 10.6 min ( 763.0- 752.4 ) Volume Invert Avail.Storage Storage Description #1 238.00' 319 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 238.00 125 0 0 238.67 225 117 117 239.00 1,000 202 319 Device Routing Invert Outlet Devices #1 Primary 238.67' 6.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=1.94 cfs @ 12.10 hrs HW=238.93' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.94 cfs @ 1.26 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 62 Pond FB.1: Forebay 1 Hydrograph 2.03 cfs 2 1.96 cfs —P flo Primary of l FeA Area=11 ,845 of Mev=238.93' Storage=254 d 3 0 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 63 Summary for Pond REP1: Replicated IVW Inflow Area = 2,749 sf, 0.00% Impervious, Inflow Depth = 4.80" for 100 Year event Inflow = 0.35 cfs @ 12.09 hrs, Volume= 1,100 cf Outflow = 0.02 cfs @ 13.76 hrs, Volume= 375 cf, Atten= 93%, Lag= 100.0 min Primary = 0.02 cfs @ 13.76 hrs, Volume= 375 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 237.01' @ 13.76 hrs Surf.Area= 1,620 sf Storage= 741 cf Plug-Flow detention time= 336.4 min calculated for 375 cf(34% of inflow) Center-of-Mass det. time= 208.2 min ( 1,026.7- 818.5 ) Volume Invert Avail.Storage Storage Description #1 236.50' 1,188 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,300 0 0 237.00 1,600 725 725 237.25 2,100 463 1,188 Device Routing Invert Outlet Devices #1 Primary 237.00' 10.0' long + 3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=0.02 cfs @ 13.76 hrs HW=237.01' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 0.02 cfs @ 0.24 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 64 Pond REP1: Replicated IVW Hydrograph 0.38 �- 0.36 0.35 cfs Inflow ---- Primary 0.34 0.32 �nfl w ;Aria=2,749- Sf------ 0.3 -------- .... 0.28 eak. E ev=237 011 0.24 .... $torage=741- �f 0.26 r 0.22. —�� 02 0 0.18. LL 0.16 -----.. -------- -------- . ... 0.14. ----- ... --------------- ------ -------- --------- 0.12 ....... 0.1 0.08.'__ ;... ------------- 0.06. 0.04, 0.02 cfs 0.02 .. +--- 0..i 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087 189 Willow Street - Drainage r231106 Type/1/24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 65 Summary for Pond RES01: Detention Pond Inflow Area = 22,816 sf, 76.03% Impervious, Inflow Depth = 7.04" for 100 Year event Inflow = 3.09 cfs @ 12.11 hrs, Volume= 13,383 cf Outflow = 2.13 cfs @ 12.25 hrs, Volume= 12,594 cf, Atten= 31%, Lag= 8.2 min Primary = 2.13 cfs @ 12.25 hrs, Volume= 12,594 cf Routed to Link DP.1 : Deisgn Point 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 238.13' @ 12.25 hrs Surf.Area= 2,705 sf Storage= 3,262 cf Plug-Flow detention time= 103.3 min calculated for 12,594 cf(94% of inflow) Center-of-Mass det. time= 69.0 min ( 844.9- 775.8 ) Volume Invert Avail.Storage Storage Description #1 236.50' 4,313 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 236.50 1,400 0 0 237.00 1,750 788 788 237.50 2,075 956 1,744 238.00 2,600 1,169 2,913 238.50 3,000 1,400 4,313 Device Routing Invert Outlet Devices #1 Primary 237.00' 8.0" Round Culvert L= 30.0' CPP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 237.00' /236.85' S= 0.0050 '/' Cc= 0.900 n= 0.011, Flow Area= 0.35 sf #2 Primary 238.00' 8.0' long +3.0 '/' SideZ x 4.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=2.13 cfs @ 12.25 hrs HW=238.13' (Free Discharge) �__2= 1=Culvert (Inlet Controls 1.19 cfs @ 3.40 fps) Broad-Crested Rectangular Weir (Weir Controls 0.94 cfs @ 0.85 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 66 Pond RES01: Detention Pond Hydrograph 3.09 cfs Inflow Primary - --- ----- ---- Infl w Area=22,816 sf eak Elev=238.13' 2.13cfs Stbrage=3,262 �f N 2. O LL 1.... ... ......... ... 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 67 Summary for Pond ROOF: Roof to Scuppers Inflow Area = 7,089 sf,100.00% Impervious, Inflow Depth = 7.75" for 100 Year event Inflow = 1.25 cfs @ 12.09 hrs, Volume= 4,578 cf Outflow = 0.74 cfs @ 12.20 hrs, Volume= 4,578 cf, Atten= 41%, Lag= 7.1 min Primary = 0.74 cfs @ 12.20 hrs, Volume= 4,578 cf Routed to Pond RES01 : Detention Pond Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 252.13' @ 12.20 hrs Surf.Area= 6,500 sf Storage= 859 cf Plug-Flow detention time= 38.8 min calculated for 4,575 cf(100% of inflow) Center-of-Mass det. time= 39.0 min ( 780.3- 741.2 ) Volume Invert Avail.Storage Storage Description #1 252.00' 3,250 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 252.00 6,500 0 0 252.50 6,500 3,250 3,250 Device Routing Invert Outlet Devices #1 Primary 252.00' 6.0" Horiz. Orifice/Grate X 3.00 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.74 cfs @ 12.20 hrs HW=252.13' (Free Discharge) t1=0rifice/Grate (Weir Controls 0.74 cfs @ 1.19 fps) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 68 Pond ROOF: Roof to Scuppers Hydrograph 1.25 cfs Inflow Primary nfli w Ar6a=7,089 sf Peak Elev=252.1;3' Storage=859 �Cf N 0.74 cfs 0 0... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 189 Willow Street 11/7/23 NOA-0087189 Willow Street - Drainage r231106 Type/1/ 24-hr 100 Year Rainfall=7.99" Prepared by Hayes Engineers, Inc Revised 1-20-10 Printed 11/6/2023 HydroCAD® 10.20-3q s/n 03206 ©2023 HydroCAD Software Solutions LLC Page 69 Summary for Link DPA: Deisgn Point 1 Inflow Area = 43,990 sf, 40.11% Impervious, Inflow Depth = 5.71" for 100 Year event Inflow = 3.85 cfs @ 12.20 hrs, Volume= 20,939 cf Primary = 3.85 cfs @ 12.20 hrs, Volume= 20,939 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Link DPA: Deisgn Point 1 Hydrograph 4 3.85 cfs —Inflow —Primary Infl w Area=43,9:90 f 0..... 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) This page intentionally left blank Appendix C: Stormwater Checklist This Page Intentionally Left Blank Massachusetts Department of Environmental Protection Bureau Of Resource Protection - Wetlands Program Checklist � �� ��� � Report ���N������N0��� N ��U� �����U���)����� ���U� ��������� � A. Introduction Important:When A Stormwater Report must be submitted with the Notice of Intent permit application to document filling out forms oomp|ienonvviththe StormvvaterK8anegementStandonde The foUmwingchecklist ie NOT a substitute for nntheonmpuoer � 'use only the the GtormwaberRepo� (vvhioh should provide more substantive and detailed information) but isoffered ab key 0o move your here as a tool to help the applicant organize their Stormwater Management documentation for their cursor-d»not Report and for the reviewer to assess this information in a consistent format. As noted in the Checklist, use the return the Stormwater Report must contain the engineering computations and supporting information set forth in key. Volume 3ofthe Massachusetts Storrnwater Handbook. The Stormvvater Report must bo prepared and certified by a Registered Professional Engineer(RPE) licensed in the Commonwealth. The Stormwaher Report must include: * The Stormwater Checklist completed and stamped by a Registered Professional Engineer(see ----�---' page 2) that certifies that the Stormwater Report contains all required submittals.' This Checklist istobe used as the cover for the completed StormvvaterReport. ^ Applicant/Project Name • Project Address ° Name of Firm and Registered Professional Engineer that prepared the Report • Long-Term Pollution Prevention Plan required by Standards 4-6 " Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan required by Standard 82 ° Operation and Maintenance Plan required by Standard S In addition to all plans and supporting information, the Stormwater Report must include a brief narrative describing stormvvater management practices, including environmentally sensitive site design and LID techniques, along with a diagram depicting runoff through the proposed BPWP treatment train. Plans are required to show existing and proposed conditions, identify all wetland resource areas, NRCS soil types, critical areas, Land Uses with Higher Potential Pollutant Loads p nd,any areas on the site where infiltration rate is greater than 2.4 inches per hour. The Plans shall identify the drainage areas for both existing and proposed conditions at a scale that enables verification�of�supporting calculations. As noted in the Checklist, the Stormwater Management Report shall dooum,ent compliance with each of the Stormwater Management Standards as provided in the Massac,husetts Stormwater Handbook. The soils evaluation and calculations shall be done using the methodol6dib��,,,,set forth in,Volume 3 of the Massachusetts Stormwater Handbook. To ensure that the Shormwater Report is oonnp|ete, applicants are required to fill in the SLurmwater Report Checklist by checking the box to indicate that the specified information has been included in the StormwaterRepnrt. If any of the information specified in the checklist has not been submitted, the applicant must provide gnexplanation. The completed Gtormwater Report Checklist and Certification must be submitted with the StormvveterReport. ''---....................................................... -............ .................................................................................---.................................... `The Smrmwamr Report may also include the Illicit Discharge Compliance Statement required by Standard 1U. |f not included in the Stonnwuter Report,the Illicit Discharge Compliance Statement must b*submitted prior to the discharge ofstonnwater runoff m the post-construction best management practices. 2 For some complex projects, it may not be possible to include the Construction Period Erosion and Sedimentation Control Plan in the Smnnwate/Report. In that event,the issuing authority has the discretion to issue an Order of Conditions that approves the project and includes a condition requiring the proponent to submit the Construction Period Erosion and Sedimentation Control Plan before commencing any land disturbance activity un the site. Massachusetts Department of Environmental Protection Bureau Of Resource Protection - Wetlands Program Checklist � �� ��� � Report ��~NN������N���� N ���� �������N�������� ���0� N��������� � B. StKDrmwater Checklist and Certification The following checklist is intended to serve o38 guide for applicants aaho the elements that ordinarily need tobe addressed in a complete Stormwater Report. The checklist is also intended to provide conservation commissions and other reviewing authorities with a summary of the components necessary for a comprehensive Stormwater Report that addresses the ten Stormwater Standards. Note: Because etormvvoter requirements vary from project to project, it is possible that a complete Stormwater Report may not include information on some of the subjects specified in the Checklist. |fitie determined that a specific item does not apply to the project und*rrovievv. please note that the item is not applicable (N.A.) and provide the reasons for that determination. A complete checklist must include the Certification set forth below signed by the Registered Professional Engineer who prepared the StormvvaterReport. Registered Professional Engineer's Certification | have reviewed the StnrmvvabsrReport, including the soil evaluation, computations, Long-term Pollution Prevention Plan, the Construction Period Erosion and Sedimentation Control Plan (if included), the Long- term Post-Construction Operation and Maintenance Plan, the Illicit Discharge Compliance Statement (if included) and the plans showing the stormwater management system, and have determined that they have been prepared in accordance with the requirements of the Stormwater Management Standards as further elaborated by the Massachusetts StormwaherHandbook. | have also determined that the information presented in the Storn)woter Checklist ie accurate and that the information presented in the Stormwab*r Report accurately reflects conditions at the site aoofthe date ofthis permit application. Registered Professional Engineer Block and Signature Svc D. cNk NO,48W 00 ignature and Date Checklist Project Type: Is the application for new development, redevelopment, or mix of new and redevelopment? New development Fl Redevelopment �� Mix of New Development and Redevelopment Massachusetts Department of Environmental Protection Bureau Df Resource Protection - Wetlands Program Checklist � �� ��� � Report ���N����0� NN��� N�0U� �����U���|����� ���0~ ��������� � Checklist (continued) LID Measures: Stormwebar Standards require LID measures tobeconsidered. Document what environmentally sensitive design and LID Techniques were considered during the planning and design of the project: F] No disturbance to any Wetland Resource Areas �] Site Design Practices (e.g. clustered development, reduced frontage setbacks) �] Reduced Impervious Area (Redevelopment Only) Minimizing disturbance toexisting trees and shrubs Fl LID Site Design Credit Requested: Credit �l Credit F] Credit [] Use of"country drainage" versus curb and gutter conveyance and pipe [� Biorebsntion Cells (includes Rein Gardens) �l Constructed StormvvaterVVet|ondo (includes Gravel Wetlands designs) [l TveeboxFi|her Z Water Quality Swale Fl Grass Channel Fl Green Roof F� Other(describe): Standard 1: No New Untreated Discharges Z No new untreated discharges Z outlets have been designed au there isno erosion or scour towetlands and waters ofthe Commonwealth Z Supporting calculations specified in Volume 3 of the Massachusetts Stormwater Handbook included. Massachusetts Department of Environmental Protection Bureau Of Resource Protection - Wetlands Program Checklist � �� ��� � Report ��00N�8�U�NN��� N �0� ������������ ���� ��������� � ~~ . .���m... m��� . �� m �� �m�'m � m � mmnx��—�°m . ~������~ � Checklist (continued) Standamd2: Peak Rate Attenuation [] Standard 2 waiver requested because the project ia |000tedin |andeutjectt000asta| etormf|ovvage and stormvvaLer discharge istoa wetland subject to coastal flooding. Fl Evaluation provided to determine whether off-site flooding increases during the 1 00-year 24-hour storm. Calculations provided to show that post-development peak discharge rates do not exceed pre- development rates for the 2-year and 1 0-year 24-hour storms. |f evaluation shows that off-site flooding increases during the 1 00-year 24-hour storm, calculations are also provided to show that post'deve|opmentpeakdisnhorgenatesdonotoxceedpre-deve|npm*ntnatesforthe1OO-yoar24- hourstorm. Stondard3: Recharge Soil Analysis provided. Required Recharge Volume calculation provided. Required Recharge volume reduced through use of the LID site Design Credits, Sizing the infi|trotion. ByNPe is based on the following method: Check the method used. E Static [:] Simple Dynamic F-1 Dynamic Field' BU Runoff from all impervious areas at the site discharging to the infiltration B[NP. Fl Runoff from all impervious areas at the site is not discharging to the infiltration BMP and calculations are provided showing that the drainage area contributing runoff to the infiltration BMPs is sufficient to generate the required recharge volume. Recharge BNlPo have been sized to infiltrate the Required Recharge Volume. Z Recharge BMPs have been sized to infiltrate the Required Recharge Volume only to the maximum extent practicable for the following reason: Z Site is comprised solely of and D soils and/or bedrock atthe land surface Fl M.G.L. c. 21E sites pursuant Lo31OCMR40.0000 F-1 Solid Waste Landfill pursuant to31OCW1R1S.00O Project is otherwise subject to Stormwater Management Standards only to the maximum extent practicable. Z Calculations showing that the infiltration BN1Pa will drain in 72 hours are provided. F-1 Property includes a M.G.L. c. 21 E site or a solid waste landfill and a mounding analysis is included. 80%TSS removal is required prior to discharge to infiltration BMP if Dynamic Field method is used, Massachusetts Department of Environmental Protection Bu[88U of Resource Protection - Wetl8DdS pFOg[@[D Checklist � �� ��� � Report ���N������NN�� � N��U� �����U��������� ���U� ��������� � Checklist /COOtiDUed\ Btandard3: Recharge (continued) �] The infiltration BMP is used to attenuate peak flows during storms greater than or equal to the 10- year 24-hour storm and separation to seasonal high groundwater is less than 4 feet and a mounding analysis is provided. Documentation is provided showing that infiltration BKAPado not adversely impact nearby wetland resource areas. Standard4: Water Quality The Long-Term Pollution Prevention Plan typically includes the following: * Good housekeeping practices; ° Provisions for storing materials and waste products inside or under cover; * Vehicle washing controls; ° Requirements for routine inspections and maintenance ofatormwater BMPe; p Spill prevention and response plans; w Provisions for maintenance of lawns, gardens, and other landscaped areas; ^ Requirements for storage and use of fertilizers, herbicides, and pesticides; � Pet waste management provisions; ° Provisions for operation and management of septic systems; w Provisions for solid vvoete management; � Snow disposal and plowing plans relative t0Wetland Resource Areas; p Winter Road Salt and/or Sand Use and Storage restrictions; ~ Street sweeping schedules; w Provisions for prevention of illicit discharges to the stormwater management system; * Documentation thatStormvveter BK8Po are designed to provide for shutdown and containment in the event ofa spill or discharges toor near critical areas or from LUHPPL; � Training for staff orpersonnel involved with implementing Long-Term Pollution Prevention Plan; � List of Emergency contacts for implementing Long-Term Pollution Prevention Plan. A Long-Term Pollution Prevention Plan is attached to Stormvvoier Report and is included as on attachment to the Wetlands Notice of Intent. [7 Treatment 8N1Ps subject to the 4496 TSS removal pretreatment requirement and the one inch rule for calculating the water quality volume are included, and discharge: [] is within the Zone || or Interim Wellhead Protection Area [] ie near ortn other critical areas is within soils with a rapid infiltration rate (greater than 2.4 inches per hour) involves runoff from land uses with higher potential pollutant loads. F� The Required Water Quality Volume in reduced through use of the LID site Design Credits. Calculations documenting that the treatment train meets the 8096 TSS removal requirement and, if applicable, the 4496 TSS removal pretreatment requirement, are provided. Massachusetts Department of Environmental Protection Bureau Uf Resource Protection - Wetlands Program Checklist �� �� ��� � Report ���N����H�NN�� � N00� ������������� ���� ��������0 � �~ . .�=��. ..m��� ° =� m -� �n�"� m � m �nn�����m . �����n�'. � Checklist (continued) Stondmnd4: Water Quality (continued) Z The BN1Pio sized (and calculations provided) based on: Z The 1/2^ or 1^ Water Quality Volume or M The equivalent flow rate associated with the Water Quality Volume and documentation is provided showing that the BK0P treats the required water quality volume. El The applicant proposes to use proprietary BMPs, and documentation supporting use of proprietary BK8P and proposed TSG removal rate ioprovided. This documentation may bein the form ofthe propriety BMP checklist found in Volume 2, Chapter 4 of the Massachusetts Stormwater Handbook and submitting copies of the TARP Report, STEP Report, and/or other third party studies verifying performance of the proprietary 8[WPa. Fl A TMDL exists that indicates a need to reduce pollutants other than TSS and documentation showing that the BW1Pa selected are consistent with the TMDLisprovided. Standard S: Land Uses With Higher Potential Pollutant Loads (LUHPPLo) F-I The NPIDES Multi-Sector General Permit covers the land use and the StormvvetorPollution Prevention Plan (SVVPPP) has been included with the StnrmvvaterReport, F-I The NPIDES Multi-Sector General Permit covers the land use and the SWPPP will be submitted prior to the discharge ofotormvvaierto the post-construction atormvvater BMPe. Z The NPIDES Multi-Sector General Permit does not cover the land use. F-I LUHPPLaere located at the site and industry specific source control and pollution prevention measures have been proposed to reduce or eliminate the exposure ofLUHPPLsto rain, snovv, snow melt and runoff, and been included in the long term Pollution Prevention Plan. F-I All exposure has been eliminated. F-I All exposure has not been eliminated and all BMPs selected are on MassDEP LU HPPL list. [� The LUHPPL has the potential to generate runoff with moderate to higher concentrations of oil and grease (e.g. all parking lots with >1000 vehicle trips per day) and the treatment train includes on oil grit separator, a filtering bioretention area, a sand filter orequivalent. StondmrdG: Critical Areas F-I The discharge is near or to a critical area and the treatment train includes only BMPs that MassDEP has approved for stormwater discharges to or near that particular class of critical area, Fl Critical areas and BPWPa are identified in the StormwoterReport. Massachusetts Department of Environmental Protection Bureau 0f Resource Protection - Wetlands Program Checklist � �� ��� � Report ��0N����U� N0�� N N �0� ������������ ���� ����0���� � ~_ ~ .�.�*��~m��~ . �� m �~ ~��m mmm �vn����.m . �����m�'. � Checklist (continued) Gtomdard7: Redevelopments and Other Projects SubieottotheStandondoon|ytothamnaximmumn extent practicable El The project is subject to the Stormwater Management Standards only to the maximum Extent Practicable as n: [1 Limited Project �1 Small Residential Projects: 5-9 single family houses or5-9 units in a multi-family development provided there is no discharge that may potentially affect a critical area. F-1 Small Residential Projects: 2-4 single family houses or 2-4 unite in a multi-family development with e discharge toa critical area F-1 Marina and/or boatyard provided the hull painting, service and maintenance areas are protected from exposure ho rain, snow, snow melt and runoff F-1 Bike Path and/or Foot Path Fl Redevelopment Project El Redevelopment portion of mix of new and redevelopment. F-1 Certain standards are not fully met(Standard No. 1, 8, 9, and 10 must always be fully met) and an explanation of why these standards are not met is contained in the Stormwater Report. �l The project involves redevelopment and a description of all measures that have been taken to improve existing conditions ie provided in the StormvvaterReport. The redevelopment checklist found in Volume 2 Chapter 3 of the Massachusetts Stormwater Handbook may be used to document that the proposed stormwater management system (a) complies with Standards 2, 3 and the pretreatment and structural BMP requirements of Standards 4-Stothe maximum extent practicable and (b) improves existing conditions. Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan must include the following information: * Narrative; * Construction Period Operation and Maintenance Plan; * Names of Persons or Entity Responsible for Plan Compliance; ° Construction Period Pollution Prevention Measures; * Erosion and Sedimentation Control Plan Drawings; w Detail drawings and specifications for erosion control BK8Ps, including sizing calculations; 9 Vegetation Planning; * Site Development Plan; * Construction Sequencing Plan; * Sequencing of Erosion and Sedimentation Controls; w Operation and Maintenance of Erosion and Sedimentation Controls; * Inspection Schedule; * Maintenance Schedule; . ° Inspection and Maintenance Log Form. A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan containing the information set forth above has been included in the Stormwater Report. Massachusetts Department of Environmental Protection Bureau Of Resource Protection ' Wetlands Program Checklist � �= ��� � Report ���N����0�NN��� N �0U� �����U�0������� ���U� ��������� � Checklist (continued) 0tandandG: Construction Period Pollution Prevention and Erosion and Sedimentation Control (continued) El The project is highly complex and information is included in the Stormwater Report that explains why it is not possible to submit the Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan with the application. AConsdruction Period Pollution Prevention and Erosion and Sedimentation Control has not been included in the Stormwater Report but will be submitted before land disturbance begins. The project is not covered by a NPOE8 Construction General Permit. �] The project ieoovenadbyaNPDESConetrucdonGenere| PermitandmoopyoftheSVVPPPisinthe GtormvvaterReport. The project iacoveredbyoNPDESConatruotionGenere| PermitbutnoSVVPPPbeonoubmitted. The SVVPPP will ba submitted BEFORE land disturbance begins. Standard 9: Operation and Maintenance Plan The Post Construction Operation and Maintenance Plan is included in the Stormwater Report and includes the following information: Name ofthe stornlwater management system owners; Party responsible for operation and maintenance; Schedule for implementation of routine and non-routine maintenance tasks; Plan showing the location of all stormwater BMPs maintenance access areas; Description and delineation nf public safety features; Estimated operation and maintenance budget; and F1 Operation and Maintenance Log Form. El The responsible party is not the owner of the parcel where the BMP is located and the Stormwater Report includes the following submissions: Acopy of the legal instrument(deed, homeowner's aeaociation, utility trust orother legal entity) that establishes the terms of and legal responsibility for the operation and maintenance of the project site stormwater BMPs; �] A plan and easement deed that allows site access for the |eQn| entity to operate and maintain BN1P functions. Standard 10: Prohibition mf Illicit Discharges The Long-Term Pollution Prevention Plan includes measures to prevent illicit discharges; [l An Illicit Discharge Compliance Statement iaattached; NO Illicit Discharge Compliance Statement is attached but will be submitted prior to the discharge of any sbormwotertopost-construction BMPa. Appendix C'SVVCheck|iot.doox^U4/01/08 Gmrmwater Report Checklist^Page 8of8 APPLICATION CHECKLIST Notice of Intent (NOI) Two (2) physical copies of the Notice of Intent(NOI)application,plans, attachments and appurtenant data and an electronic copy must be received in hand by the NACC office no later than 10:00 a.m. nine(9) business days prior to the target meeting date(NACC meeting schedule posted oil website). One(1) physical copy of materials to be mailed by certified mail or hand delivered to: DEP North East Regional Office 205B Lowell Street Wilmington, MA 01887 General Requirements—Wetland Protection Bylaw & Regulations: Please check the following boxes indicating that you have read& now understand the applicable rule and/or regulation: X1 Section 190-2(page 1)—identifies the Town's wetland resource areas. Section 190-4(page 2)—pertains to permit application types. (Note: All applications shall NOT be accepted as complete before all other permits,variances,and approvals required by the Bylaws of the Town with respect to the proposed activity, at the time of such Notice,have been applied for or obtained".This does not include building permits). ® Section 190-5 (page 3)—pertains to public hearings and the burden of proof placed on an applicant. ® Section 190-8 (page 6)—pertains to responsibility for compliance. ® Regulations Section '1.0(page 1)—pertains to general provisions General Application Requirements —Per North Andover Wetland Protection Regulations: ❑x NOI application,filled out and signed. 0 Site plan—true to scale (not reduced). **See Plan requirements below.** X Certified list of abutters prepared by the Town Assessor's Office within 300' of the parcel(s)where work is proposed. (NOTE: certified list shall not be more than 30 days old at the time of filing.) ® Abutter Notification Form.Notifications to abutters shall be made by certified mail or certificates of mailing not less than seven (7)calendar days prior to the public hearing. Proof of mailing shall be presented at that hearing in the form of"white slips"or signed"green cards."(Certificates of mailing is a less expensive option). 0 North Andover Riverfront Maps—USGS Topographic Map (Appendix B) -circle the project site and label it"Locus". 0 The most recent Estimated Habitat of Rare Wetlands Wildlife Map &Certified Vernal Pools map published by NHESP has been reviewed. ❑X Copies of the State Fee Transmittal Form and State Check. The State's portion of the State Filing Fee shall be sent to: DEP, Box 4062, Boston, MA 02211.Town portion of the state filing fee and the local Wetland Bylaw fee is to be included with the application (Section 1.4). Q NACC Bylaw Wetlands Filing Fee Calculation Worksheet. **Each separate activity within the project is assessed a fee and review of wetland delineation greater than 100 lineal feet is assessed a fee." n Check payable to the Town of North Andover in the amount of the Town's portion of the State fee AND the total Bylaw fee. Page 1 of 3 120 Main Street, Conservation Dept., North Andover Massachusetts 01845 Phone 978.688.9530 Fax 978,688.9542 Web www.northandoverma.gov_ Effective 03 23 16, Updated July 07 20 21 R Written narrative of the proposed project and potential irripacts to all wetland resource areas. R Description of observed valuable and/or unique wildlife habitat characteristics. El Wildlife Habitat Evaluation performed by a qualified Wetland/Wildlife Biologist (Section 6.2), where applicable. @ Waiver Request Form with Alternatives Analysis(Appendix D), if work is proposed within 25' NDZ/50' NBZ. El Notification of public hearing made in the Lawrence Eagle Tribune at the applicant's expense not less than seven (7) calendar days prior to the public hearing. Conservation Staff will prepare the appropriate legal notice. Tile Tribune will contact the applicant for payment when proof is ready. All wetland resource area flags and associated numbering are present and easily readable in the field as of the date of this application. Stormwater Management Requirements (Section 7.0): Project is in compliance with the "Ten (10)North Andover/State Stormwater Standards", if applicable. DEP Storrnwater Management Form has been submitted with the Notice of Intent and signed/stamped accordingly (Appendix H). Hydrologic/hydraulic calculations showing the full flow capacity and velocity of all water courses, open and only sometimes closed channels, and storm drains flowing into, on and Out of the parcel, including engineering calculations for compensatory flood storage areas have been incl. (Refer to Section 7.0). Erosion & Sedimentation Control Requirements (Section 7.1): nX Narrative erosion control plan and/or report provided for any proposed alteration of wetland resource areas, including tile buffer zone. Construction schedule/sequence provided for any work within a wetland resource area including specifications for ternporary and permanent ground cover. Plan Requirements (Section 4.3.2): FXI Title should include name of the project, location and names of the person(s)preparing the drawings and tile date prepared including any revision dates. Ed Drawings must be stamped and signed by a Registered Professional Civil Engineer of the Commonwealth&/or Registered Professional Land Surveyor of the Commonwealth (whichever is applicable). All existing condition plans shall include, at a rninii-nurn,the following information: FX1 All wetland resource areas within 100' of tile proposed work and within 200' of Riverfront Area with applicable no disturb and no build zones, delineated by a professional wetland scientist not more than 3 years from the application submission date. • Delineated by: Mission Wetland and Ecological on (date): October 7, 2022 OR • Formally approved delineation on (date): DEP File# FX1 All property boundaries, existing lot lines and abutters frorn most recent information available at tile Assessor's Office. FX1 Watershed Protection District Boundaries, Surface water supplies, wells, and septic systems within 100' of proposed work. Existing Contours at not less than 2' intervals and datum Source. Page 2 of 3 120 Main Street, Conservation Dept.,North Andover MassachUsetts 01845 Phone 978.688.9530 Fax 978.688.9542 Web www.northandoverrng.qm� Effective 03 23 16, Updated July 07 20 21 NX All existing natural and man-made features including tree lines, rock outcrops,Stolle walls, fence lines, cart roads, foot paths, overhead and Underground utilities and drainage structures. nX Elevations of all natural and man-made drainage structures, waterways, and wetlands. HX I 00-year flood elevations of all natural and/or man-made waterways and waterbodies as determined by FEMA or engineering calculations. El Subdivision plans shall be submitted at an appropriate scale to accurately depict existing and proposed conditions(typ.I" 40'). Individual parcels of land within the Subdivision and under the Wetlands Protection Act and North Andover Bylaw sliall be submitted at an appropriate scale(typ. F=20'). All proposed/project condition plans shall include, at a minimum, the following information (p. 24): RX Location of proposed work with distances to wetlands, including project access and stockpile location. R All proposed man-made features including roads,driveways, parking areas, structures, buildings, overhead and underground utilities. nX Subsurface sewage disposal systerns. nX Proposed grading and changes in elevation depicted with 2' Contours and spot grades. RX All surface and Subsurface drainage structures including the location, cross section, slope and Surface treatment of all drainage channels. FX1 The inverts, slope, pipe materials, catch basins, manholes, and end treatment of all storm drains discharging within 100' of any wetland resource area. nX Location and detail of all temporary erosion control devices, diversions,terraces, silt fences, hay bales barriers, sedimentation basins, and soil stockpile locations on the project site. Q Location and nature of all proposed alterations to and replication of wetland resource areas. **See Regulations Section 6.0 for details on replication requirements." %0_400-� 11-7-210,? Signature of Applicant or Applicant's Representative Date ----------- -------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------- ------------------ (TO WIV USE ONL Y) F1 COMPLETE APPLICATION—It appears as though your application rneets minimum submittal requirements, as such, a public hearing will be scheduled before the NACC within 21 days upon receipt of this application. INCOMPLETE APPLICATION-The following sections of the Wetland Protection Bylaw&/or Regulations have not been complied with and as a result this Department is rejecting this incomplete application w/in two (2)business days from the date of receipt (Section 1904A North Andover Wetland Protection Bylaw). You may pick up this application and supporting plans at the Conservation Office and re-file a complete Notice of Intent. Wetland Bylaw- Section(s): Wetland Regulations—Section(s): Signature of Agent: Date: Page 3 of 3 120 Main Street, Conservation Dept., North Andover Massachusetts 01845 Phone 978,688,9530 Fax 978,688.9542 Web www.northandoverrna.go\� Effective 03 23 16, Updated July 07 20 21 Appendix D: Construction Period Pollution Prevention Plan This Page Intentionally Left Blank Proiect Name: 189 Willow Street—Business Offices Owner's Name: Vincent J. Grasso 30 Faulkner Road North Andover, MA 01845 Applicant's Name: Same as above Party Responsible for Maintenance: To be determined Project Description: The Applicant proposes to construct a business office building, associated parking and driveways, site utilities and stormwater appurtenances at 189 Willow Street in North Andover, Massachusetts. Erosion and Sedimentation Control Measures During Construction Activities: Straw Wattles Straw Wattles are to be installed as shown on the Construction Plans. Wattles are to be installed prior to the commencement of work on the site and in accordance with the design plans. An additional supply of wattles shall be maintained on-site for repair and/or replacement of any disturbed wattles. The wattles line(s) shall be inspected and maintained on a weekly basis. Deposited sediment shall be removed when the level of deposition reaches approximately one-third(1/3)the height of the wattle. Storm Drain Inlet Protection A temporary storm inlet protection filter will be placed in all catch basin units. The purpose of the filter is to prevent the inflow of sediment into the closed drainage system(s). The filters shall remain in place until a permanent vegetative cover is established and the transport of sediment is no longer visibly apparent. The filter shall be inspected and maintained on a weekly basis and after significant storm events. Significant storm events are those having greater than one-quarter (1/4) inch of precipitation in a 24-hour period. Surface Stabilization The surface of all disturbed areas shall be stabilized during and after construction. Temporary measures shall be taken during construction to prevent erosion and sedimentation. No construction sediment shall be allowed to enter infiltration areas. All disturbed slopes shall be stabilized with a permanent vegetative cover. Some or all of the following measures can be used on the Project as conditions may warrant: • Temporary Seeding • Temporary Mulching • Placement of Hay • Placement of Geo-Synthetic Fabrics • Hydroseeding • Permanent Seeding • Placement of Sod Surface and Subsurface Infiltration Facilities No construction period runoff should be directed toward infiltration facilities. The performance of these facilities shall be checked weekly and after significant storm events throughout construction. INSPECTION SCHEDULE and EVALUATION CHECKLIST To be completed weekly and within 24-hours of significant rainfall events (greater than 1/4- inches in a 24-hour period). Inspector's Name: Date: Qualifications: Days since last rainfall: days Amount of last rainfall: inches Stabilization Measures Date of Last Date of Next Stabilized Sub-Catchment Disturbance Disturbance (Yes or No) Stabilized With: Condition Stabilization required: To be performed by: on or before: PERIMETER CONTROLS Date of Inspection: Silt Fence and Hay Bales: Has sediment reached 1/3 Is there evidence height of silt Depth of Is fence of bypass or fence? Silt secure? overtopping?(Yes Describe location of Problem(s),if To Study Area: (Yes or No) (inches) (Yes or No) or No) any. DPI DP2 Maintenance required for silt fence and hay bales: To be performed by: on or before: Stabilized Construction Entrance: Does much sediment get Is all traffic using tracked onto the entrance to Is the culvert beneath the roadway? Is gravel clean or access/exit the site? entrance working?(Yes or Location (Yes or No) full of sediment? (Yes or No) No) Farm Ave Maintenance required for stabilized construction entrance: To be performed by: on or before: Other Best Management Practices: Maintenance In use? Required?(Yes or BMP (Yes or No) No) Describe location of Problem(s),if any. Sweeping of Adjacent Roads Catch Basin Inlet Protection Swale 1 Swale 2 Maintenance required: To be performed by: on or before: I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. Signature: Date: This Page Intentionally Left Blank Appendix E: Long Term Operations and Maintenance Plan This Page Intentionally Left Blank Project Name: 189 Willow Street—Business Offices Owner's Name: Vincent J. Grasso 30 Faulkner Road North Andover, MA 01845 Applicant's Name: Same as above Party Responsible for Maintenance: To be determined Project Description: The Applicant proposes to construct a business office building, associated parking and driveways, site utilities and stormwater appurtenances at 189 Willow Street in North Andover, Massachusetts. Post-Construction Inspection and Maintenance Measures: Erosion Control Sedimentation caused from erosion of soils can adversely affect the performance of the storm water management system. Areas that are barren and/or showing signs of erosion should be stabilized through immediate re-vegetation. Debris and Litter Removal Litter and other debris may collect in storm water best management practices (BMPs), potentially causing clogging of facilities. All debris and litter shall be removed as necessary, at a minimum of four(4) times per year in the spring, summer, fall and winter. Debris and litter should be removed from the wetland resource areas (bordering and isolated vegetated wetlands) on a weekly basis. The dumpster area, and dumpsters, should remain closed and contained at all times. Bio-Filter Swale Mulch the swale annually in the spring. Dead vegetation should be removed twice annually in the early spring and late fall. Sparsely vegetated areas should be raked and re-seeded at this time. Clean swale of litter, debris, and sediment at a minimum four (4) times per year. Sediment Forebay In accordance with Volume 2, Chapter 2 of the MassDEP Storm Water Handbook as summarized below: Sediments and associated pollutants are removed only when sediment forebays are actually cleaned out, so regular maintenance is essential. Frequently removing accumulated sediments will make it less likely that sediments will be resuspended. At a minimum, inspect sediment forebays monthly and clean them out at least four times per year. Stabilize the floor and sidewalls of the sediment forebay before making it operational, otherwise the practice will discharge excess amounts of suspended sediments. When mowing grasses, keep the grass height no greater than 6 inches. Set mower blades no lower than 3 to 4 inches. Check for signs of rilling and gullying and repair as needed. After removing the sediment, replace any vegetation damaged during the clean-out by either reseeding or resodding. When reseeding, incorporate practices such as hydroseeding with a tackifier, blanket, or similar practice to ensure that no scour occurs in the forebay, while the seeds germinate and develop roots. Extended Detention Basin In accordance with Volume 2, Chapter 2 of the MassDEP Storm Water Handbook and Manufacturer's recommendations as summarized below: Inspect the basin at least twice per year including the outlet structure. Remove any debris that might clog the system. Inspect level of sediment and remove at least once every 5-years. Mow the side slopes, upper stage and embankment at least twice per year. Good Housekeeping Practices: Provisions for storing paints, cleaners, automotive waste and other potentially hazardous household waste products inside or under cover: • All materials stored on-site shall be in a neat, orderly manner in their appropriate containers with original manufacturer's label(s); • Only store enough material as needed; whenever possible, all of a product shall be used prior to disposing of container; • Manufacturer, federal, state and local recommendations for proper use and disposal shall be followed. Vehicle Washing Controls: • Use commercial car washes whenever possible. Car washes treat and/or recycle wash water; • There shall be no on-site washing of vehicles. Routine Inspection and Maintenance of Storm Water BMPs • Previously addressed. Spill Prevention and Response Plans • Spill control practices shall be in conformance with the guidelines set forth in the National Pollutant Discharge Elimination System (NPDES) Storm Water Pollution Prevention Plan (SWPPP). Maintenance of Lawns, Gardens and Other Landscaped Areas: • Grass shall not be cut shorter than two (2) to three (3)inches and mulch clipping should be left on lawns as a natural fertilizer; • Use low volume water approaches for irrigation such as drip-type or sprinkler systems. Water plants only when needed to enhance root growth and avoid runoff problems; • Mulch shall be used wherever practicable. Mulch helps retain water and prevents erosion. Storage and Use of Fertilizers, Herbicides and Pesticides: • Fertilizers shall be applied in the minimum amounts recommended by the manufacturer. Once applied, fertilizer shall be worked into the soil to limit exposure to storin water. Storage will be in covered areas only. Contents of partially used bags shall be transferred into sealable plastic containers to avoid spills; • Do not fertilize before or during rain events; • Consider the use of organic fertilizers; • Pesticides shall be applied only when necessary and only in the minimum amounts recommended by the manufacturer. Pet Waste Management • Scoop up and seal pet waste in plastic bags. Dispose of in garbage. Solid Waste Management • All solid waste shall be disposed of or recycled in accordance with all federal, state and local regulations. List of Emergency Contacts for Plan Implementation To be determined by Owner. POST-CONSTRUCTION OPERATION AND MAINTENANCE LOG Inspector's Name: Date: Qualifications: Inspection Type: ❑ Routine ❑ Spill ❑ Other: ❑ Post-Rainfall (Precipitation in Inches: ) BMP Frequency Date Last Comments Performed Litter and After Significant Debris Rain Events Removal Inspect four (4) Treatment times per year Swales Maintenance as necessary Vegetated Inspect as Areas necessary for erosion Inspect two (2) Sediment times per year Forebay Maintenance as necessary Inspect two (2) Extended times per year Detention Maintenance as necessary Appendix E: Local Waiver Requests Notice of Intent 189 Willow Street North Andover,MA This Page Intentionally Left Blank Notice of Intent 189 Willow Street North Andover,MA 25-Foot No Disturbance Zone and 50-Foot No Build Zone Waiver Request Worksheet* This worksheet must be filled out and submitted with the NOI or RDA when work is proposed within the 25-Foot No Disturbance Zone (NDZ) and/or 50-Foot No Build Zone(NBZ) What resource area is associated with the NDZ and/or NBZ? (If unknown, consult with Conservation Department.) Isolated(IVW) and Bordering Vegetated Wetlands (BVW) are associated with the NDZ and NBZ at the site. What other resource areas are located on the site? The site also has Bordering Land Subject to Flooding along the westerly_portion of the property. Describe the existing conditions of the wetland, 100' Buffer Zone,NDZ and/or NBZ: The wetlands and buffer zones have little value for habitat, nutrients, or erosion control. The site was previously disturbed under an OOC issued in 2005 and 2015. The Site is currently overrun with opportunistic vegetation that has impaired the function of the resources and buffer zones. Existing conditions are also described in the accompanying Plans and Notice of Intent Narrative. Describe the scope of work and types of activities and impacts proposed within the NDZ and/or NBZ: The Applicant seeks to construct a 6,667 sf. office building, associated parking,utilities and landscapingwithin ithin the NBZ as the upland areas of the site are almost wholly located within this zone. The Applicant is also seekin to construct stormwater controls and wetland replication and mitigation areas within the NDZ as described in the accompanying Plans and Notice of Intent Narrative. Describe the alternatives that were analyzed and considered that would remove work from the NDZ and/or NBZ and why such alternatives were not proposed: There is no practicable or feasible alternative to siting the work within the NBZ and NDZ. The entirety of the upland areas of the site are located within these zones_ The IVW is of little value, and does not meet the Presumption of Significance under Section 3.2 of the Regulations. Mitigative and restoration measures are located within the NDZ due to proximity to existing resource areas. Describe how the scope of work and impacts have been minimized within the NDZ and/or NBZ and how the proiect will have no adverse impacts on this zone or the resource: The NBZ and NDZ are choked with opportunistic vegetation and are functioning poorly or not functioning at all. The removal of this opportunistic vegetation along with the replication and enhancement of wetland resource areas including the ling of native species will provide additional habitat and forage opportunitied for wildlife and result in an improvement to the resource areas as a whole_ z Describe what mitigation is proposed to improve existing conditions and function of the NDZ and/or NBZ and Buffer Zone; please provide square footage of mitigation and ratio of impact to mitigation: The Project results in the loss of 3,664 sf. of IVW that does not meet the Presumption of Significance under the Local Regulations. The Applicant is proposing an additional 610-sf. of replicated IVW and 4,438-s£ of replicated RVW at the Site for a 1.4-1 replacement ratio_ *If work is within 100' of an ephemeral pool, further consultation with the Conservation Department is required. This page intentionally left blank