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Home My WebLink About2015-01-06 Correspondence DTO SP 312/2016 Town of North Andover Mail-Fwd:Revisions to West Mill Center Lot Plan North Andover NOR "ANPPWR Massachu�� , Jean Enright<jen rig ht@northandoverm a.gov> Fwd: Revisions to West Mill Center Lot Plan North Andover 1 message Rebecca Oldham <roldham@northandoverma.gov> Wed, Mar 2, 2016 at 11:31 AM To: Jean Enright <jendght@northandoverma.gov> Rebecca Oldham Staff Planner Toy,n of North Andover 1600 Osgood Street,Suite 2043) North Andover,MA 01845 Phone: 978.688.9535 Fax: 976.688.9542 Email: ROldham@northandoverma.gov i Forwarded message From: Jean Enright<jenright@northandoverma.gov> Date: Mon, Feb 22, 2016 at 1:46 PM Subject: Fwd: Revisions to West Mill Center Lot Plan North Andover To: Rebecca Oldham <roldham@northandoverma.gov> -- Forwarded message From: Jennifer Hughes <jhughes@northandoverma.gov> Date: Mon, Feb 22, 2016 at 1:22 PM Subject: Re: Revisions to West Mill Center Lot Plan North Andover To: Seth Zeren <szeren@.-cg-llc.com> Cc: Lisa Eggleston <Iisa@egglestonenvironmental.com>, "Enright, Jean" <J E n rig ht@townofnorthandover.com>, "Hughes, Jennifer" <JHughes@to,,vnofnorthandover.com>, David Steinbergh <dsteinbergh@rcg-lIc.com>, Jon Ford <jford@horsleywitten.com> The next commission meeting would be March 9. On Mon, Feb 22, 2016 at 1:14 PM, Seth Zeren <szeren@rcg-lIc.com> wrote: https://maCti.google.com/mail/L,VO/?ui=2&ik=7c2eff6265&view=pt&search=inbox&th=152c6el2l46id24f&siml=153382badO28c9eO 1/5 3/212016 Town of North Andover Mail-Fwd:Revisions to West Mill Center Lot Plan North Andover Thank you Lisa. Jean and Jennifer, what's the earliest meeting date that we can schedule with Planning Board and ConCom? Thanks, seth From: Lisa Eggleston [mailto:lisa@egglestonenvironmental.com] Sent: Monday, February 22, 2016 12:36 PM To: Seth Zeren; Enright, Jean; Hughes, Jennifer Cc: David Steinbergh; Jon Ford Subject: Re: Revisions to West Mill Center Lot Plan North Andover Jean and Jennifer, I have reviewed the February 4th letter and revised plans from Horsley Witten Group, and also discussed the drainage revisions with Jon Ford. The design calculations for the revised bioretention systems were not part of my review, however it is my understanding that the revised design does provide the required pretreatment and treatment volumes in the basins consistent with the approved plan. I do not have any issues with the design revisions proposed and concur that they can be considered minor and insignificant with respect to the Wetland Bylaw. I would further add that white the proposed revisions do simplify the design somewhat, the project will still require a good deal of construction oversight to ensure that it is built as designed. Please Let me know if you have any additional questions. hftps://mail.google.com,,'Mail,'u/O/?ui=2&i k=7c2eff6265&view=pt&search=inbox&th=152c6e121461 d24f&sim[=I 53382badC,28c9eO 2/5 322/2016 Town of North Andover Mail-Fwd:Revisions to west Mill Center Lot Plan North Andover Lisa D. Eggleston, P.E. Eggleston Environmental 32 Old Framingham Rd, Unit #29 Sudbury, MA 01776 Tel 508.259.1137 From: Seth Zeren <szeren@rcg-llc.com> Rafe: Monday, February 8, 2016 at 11:19 AM To: Lisa Eggleston <Iisa@egglestonenvironmental.com>, "Enright, Jean" <JEnright@townc,northandover.com>, Jennifer Hughes <Jl,ughes townofno handover.com> Cc: David Steinbergh <dsteinbergh@rcgallc.corm>, Jon Ford <jford horsleywitten.cor > Subject: Revisions to West Mill Center Lot Plan North Andover Hello Lisa, Now that the building is down in the center of our site in North Andover and we have further developed our construction drawings, we have identified a number of improvements in the proposed stormwater system. I've spoken with the Town of North Andover and they would like you to weigh in on the changes. I've attached a letter from our engineer discussing the changes and the proposed drawings. I'd like to find a time for you and Jon to touch base, this week ideally, to go over them. Please let us know your availability. Thanks again Seth Zeren Development Manager RCG LLC 17 Ivaloo St Suite 100 Somerville,MA 02143 https://mail.google.comimail/u./012ui=2&i k=7c2eff6265&vi ew=pt&search=i nbox&th=152c6el2l46l d24f&si m l=153382bad028c9eO 315 3/2/2016 Town of North Andover Mail-Fwd:Revisions to West Mill Center Lot Plan North Andover 617-625-8315(office) 617-284-2164 (direct) 860-707-5553 (cell) 617-625-8345(fax) Jennifer A. Hughes Conservation Administrator Town of North Andover 1600 Osgood Street,Suite 2035 North Andover,MA 01845 Phone 078.688. 530 Fax 978,688.9542 Email jhughes@northandoverma.gov Web www.northandoverma.gov https:i'/m ail.rgoogle.com,mai I/Ld0/2ui=2&ik=7c2eff6265&view=pt&search=ink&th=152c&el2l461d24f&sire I=I53382badO28c9eo 4/5 3/212016 Town of North Andover Mail-Fwd:Revisions to West Mill Center Lot Plan North Andover Sincerely, Jean Enright Assistant Director Community and Economic Development Town of North Andover 1600 Osgood Street,Suite 2035 North Andover, MA 01845 Phone 978.688.0533 Fax 978,688,9542 Email: jenHaht@townollnorthandover.com Web: ;v ,v.To\,vnotNorthAndover.com cid:image001.jpg('", https:,I/mail.google.com,mail/ulo,?ui=2&ik=7c2ef€6265&view=pt&search=inbox&th=152c6el2i461d24f&sim1=153382bad028c9e0 �f Horsley Wit#en Group Sustainable Environmental Solutions 55 Dorranee Street-Suite 403•Providence,RI 02903 401.272-1717 horsleywh(en.com Or��lq,iu r 711A1r79/J��' February 4, 2016 Via ernail Ms.Jennifer Hughes Town of North Andover 1600 Osgood Street, Suite 2035 North Andover, MA 01845 Re: West Mill Redevelopment,4 High Street, North Andover- Design Update DEP File V NE-242-1629 Dear Ms. Hughes: On behalf of RCG, LLC,the Horsley Witten Group, Inc. (HW) is submitting the enclosed revised civil design plans for redevelopment of the existing West Mill Complex on High Street for review of modifications, and as a request for determination as a minor and insignificant project change.The North Andover Conservation Commission issued an Order of Conditions for the project on February 12, 2015 and an Amended Order of Conditions on July 23, 2015.Since issuance of the Amended Order of Conditions,the project design has progressed to bid and construction documents.As part of this process,the design has been simplified to address value engineering changes and design coordination items. The following design modifications have been made to simplify the design, improve constructability, and reduce cost: ® Minor parking,grading, and sidewalk changes were made to reduce cost and coordinate with modifications to building entry locations and elevations. Changes include the elimination of a curb bumpout along Building 5; enlargement of curb bumpouts on the northwest and southwest end of the center of the site; removal of the proposed sidewalk ramp and stairs near the western entrance to Building 5; and adjustment to the sidewalk layout in front of Building 36 and former Building 37. ® Bioretention system 4 was relocated approximately 30 feet west to accommodate the minor adjustments to site layout noted above. ® Bioretention systems 2A, 2B, and 2C were consolidated into one bioretention system. s Bioretention systems 6 and 7 were combined into a single bioretention system (renamed system 6)to simplify the design.An emergency overflow is proposed to connect to the existing twin culverts via the existing drainage structure DMH 1.1.0 and existing pipe connection. • Bioretention systems 4, 5, and 6 were modified from Type 2 to Type 1 (see details on Sheet C- 10)to replace the linear channel forebays with typical forebays,thus simplifying the design and reducing cost.The adjusted design provides the approved pretreatment volume. ® The proposed linear channel bioretention pretreatment detail was modified, replacing the concrete forebay with metal plate with a trench drain pan for simplicity and to reduce cost.The pretreatment function is identical to the approved design. Ms.Jennifer Hughes 2 of 2 West Mill Redevelopment • The design of the site's center greenspace was simplified.The proposed bioretention system 5 berms and double underdrain pipe was edited to provide a single vegetated drainage area with an underdrain. • The extent of the proposed block retaining walls in the center of the site was reduced. • The proposed wooden deck and associated ramp systems were deleted to reduce cost. • Additional annotation and detail was added throughout the plan set for constructability. It is our request that the updated Construction Documents be processed as a minor and insignificant Modification per Section 8.4 of the North Andover Wetland Protection Regulations and Condition 41 of 'i the Amended Order of Conditions.The plan changes are consistent with the approved design.The revised plan does not result in an adverse impact to the wetland resource areas or to water quality at Osgood Pond. Compared to the previously approved design,the submitted modified design includes conversion of more impervious area within the overall limit of disturbance to vegetated area,conversion of more impervious area within the 50-foot No Build Zone to vegetated area,and conversion of more impervious area within the 100-foot Wetland Buffer Zone to vegetated area. No substantive changes to the approved design are proposed within the 25-foot No Disturb Zone. As with the original and Amended NOI filings,the vast majority of the proposed work will occur within existing disturbed and/or impervious areas. No work will occur within wetland resource areas. Pre- development and post-development drainage analysis points have not changed compared to the approved design. Consistent with the approved design, all bioretention areas are sized to treat the 0.S- inch storm event at a minimum,and the 1-inch storm event to the maximum extent practicable, for water quality treatment. Consistent with the approved design, post-development peak discharge rates do not exceed pre-development peak discharge rates due to the reduction in impervious cover.An erosion and sedimentation control barrier has already been implemented as part of approved demolition activities to protect downgradient resource areas,and construction-related impacts will be minimized and restored upon completion of construction. Revised Civil Sheets C-1 through C-13 last revised December 2015 are enclosed.Stamped hard copies and the required $200 filing fee for this Modification Request will be provided under separate cover. If you have any questions or require any additional information, please do not hesitate to contact me I directly. I Sincerely, i HORSLEY WITTEN GROUP, INC. r Jonathan A. Ford, P.E. Senior Project Manager—Community Design ° Enclosures cc: Seth Zeren & David Steinbergh, RCG LLC 1. I 6/24/2016 Town of North AnOyer Mail-Fwd:West Mill Center Lot Project Update and Minor Changes NO ORAN 0,,,OVER Rebecca Oldham <roldham@northandoverma.gov> massachu! vo......... ............. --------- ............... Fwd: West Mill Center Lot Project Update and Minor Changes 1 message ---------- Jean Enright <jenright@northandoverma.gov> Tue, Jun 21, 2016 at 11:46 AM To: Rebecca Oldham <roldham@northandoverma.gov> Please keep a hard copy in the file with the other minor modification documents. Thanks ---------- Forwarded message ---------- From: Lisa Eggleston <1isa@egg9estorierivironnientaA,cory,i> Date: Tue, Jun 21, 2016 at 11:32 AM Subject: Re: West Mill Center Lot Project Update and Minor Changes To: Seth Zeren <szeren@rcg-llc.corn>, Jennifer Hughes <jhughes@ruoirtlhiaridoverrria,gov> Cc: David Steinbergh <dsteinbergh@rcg-Hc,corn>, Jon Ford <jford@horsleyMttein,corn>, Eric Kfoury <ekfoury@northmidoveirnia.gov>, Jean Enright <jenhght@r)orttia�idover:ina.gov>, Bernadette Curran <bCLirrain@nortl'iandoveirma,,gov>, Julie Vondrak <jvondrak@yahoo.corn>, "phi I.henry@cdgengi needng.com" <phi L henry@cdgeirigi neeh lig.corn> Jean and Jennifer, I have reviewed these proposed modifications and the 6/14/16 summary letter from Horsely Witten and concur that they are minor changes that will not impact the proposed stormwater management on the site. I recommend approval. Please let me know if you have any questions or need anything else. Lisa D. Eggleston, P.E. Eggleston Environmental 32 Old Framingham Rd, Unit#29 Sudbury, MA 01776 Tel 508.259,1137 From: Seth Zeren <szeren@rCg-Ilc,corn> Date:Tuesday,June 14, 2016 at 4:36 PM To:Jennifer Hughes<jllLpghes@r)orthandoverrna.gov>, Lisa Eggleston <fisa@ egg lestone nv4-oin rIne rita 1.com> Cc: David Steinbergh <dstelnbergh@rcg-llc.com>,Jon Ford<jford@IBiou�slleywitteri.coryi>, Eric Kfoury <ekfoury@noirtl,iiandoverma,,gov>,Jean Enright<jenright@inoirthandoveirma.gov>, Bernadette Curran <bcurran@northandoverma.gov>,Julie Vondrak<jvondrak@yahoo.corn>, "plhil,henry@cdgeiigirieering.com" <phil.henry@cdgengineering.cod,-n> Subject: West Mill Center Lot Project Update and Minor Changes Hello Jennifer and Lisa, Please find attached plans and an explanatory letter regarding some additional tweaks that we would like to make to the center lot drainage system. We completed our underground investigations a couple weeks back and came across several other hidden conditions that made it infeasible to move forward to way that we had originally proposed (chiefly other underground pipes that we didn't want to disturb). We worked to find simple solutions which would preserve the intent and outcomes of the original design which are presented here. Overall, the changes seem to result in less construction impact to the pond and a simpler system. We hope that these can be processed through a similar administrative review process as the previous modifications. https://maiI.google.com/mai1/?ui=2&ik=ab4f3cb798&view=pt&search=inbox&th=15573a484302f3ef&sim1=15573a484302f3ef 1/3 6t24/2016 Town of North Andover Mail-Fwd:West Mill Center Lot Project Update and Minor Changes Now that we have resolved these issues we're really cooking on site work and expect to complete the bulk of the site work by August with plantings to follow in the fall. Thanks, Seth Zeren Development Manager RCG LLC 17 Ivaloo St Suite 100 Somerville,MA 02143 617-625-8315(office) 617-284-2164 (direct) 860-707-5553(cell) 617-625-8345(fax) Sincerely, Joan Enright Assistant Director Community and Economic Development Town of North Andover 1600 Osgood Street,Suite 2035 North Andover,MA 01845 Phone 97&6W9533 Fax 976.688.9542 Email: jenrught@towsiofnorthandover.com Web: www.TownofNorthAndover.com littps://mail.google.com/majl/?ui=2&ik=ab4f3cb798&view=pt&searGh=inbox&th=15573a4&4302f3ef&sirnI=15573a484302f3ef 213 Horsley Wiften Group Sustainable Environmental Solutions 55 Dorronce Street•Suite 403•Providence,R102903 401-272-1717 M horsteywitten.com June 14, 2016 Via email Ms.Jennifer Hughes Town of North Andover 1600 Osgood Street,Suite 2035 North Andover, MA 01845 Re: West Mill Redevelopment, 4 High Street, North Andover- Design Update DEP File# NE-242-1629 Dear Ms. Hughes: On behalf of RCG, LLC, the Horsley Witten Group, Inc. (HW) is submitting the enclosed Bioretention Clarification Sketch dated June 14, 2016 for redevelopment of the existing West Mill Complex on High Street for review of modifications, and as a request for determination as a minor and insignificant project change.The North Andover Conservation Commission issued an Order of Conditions for the project on February 12, 2015 and an Amended Order of Conditions on July 23, 2015. Since issuance of the Amended Order of Conditions,the project design has progressed to bid and construction documents, and construction has commenced. As part of the construction process, additional bioretention clarification requests and contractor field design coordination items have arisen. The following design clarifications and modifications have been made to simplify the design and improve constructability: ® Due to a conflict with existing underground electrical and other underground utility lines near the existing cooling tower,the drainage pipe routing from bioretention systems BIO-1, BIO-4, and BIO-7 was revised as noted below and as shown on the Bioretention Clarification Sketch: a The existing pipe connection to the 60-inch culvert was field located and verified to be in acceptable condition for reuse per the approved plans (the approved plans show this connection from EX-DMH-1.1.0 on C-6). o Existing pipe from the existing drainage manhole in the loop to the connection at the culvert was field located and verified to be in acceptable condition for reuse per the approved plans (the approved plans show this connection on C-6 from the manhole in the loop to EX-DMH-1.1.0 and from EX-DMH-1.1.0 to the culvert). o Per field investigation,the existing manholes along this pipe run (EX-DMH-1.1.0 and another structure not shown on the plans)were found to be in poor condition. New DMH-1.1.0 and DMH-1.2.0 are proposed to replace these structures. DMH-1.2.0 location and rim is designed as an emergency overflow from the central greenspace BIO- 5 per the approved plans. o Pipe overflow from BIO-1 is proposed to connect to an existing 18-inch pipe utilizing the existing outfall at Osgood Pond, thus eliminating the previously proposed Outlet-1 and reducing construction impact near Osgood Pond. o Pipe overflow from BIO-4 is proposed to run east to connect to new DMH-1.1.1 due to the conflict with existing underground utility lines near the cooling tower. Ms.Jennifer Hughes 2 of 2 West Mill Redevelopment • Additional detail and annotation was added to clarify proposed bioretention grading and pre- treatment weir locations for all systems.The design of these systems was not modified as part of the clarification. It is our request that the Bioretention Clarification sketch be processed as a minor and insignificant Modification per Section 8.4 of the North Andover Wetland Protection Regulations and Condition 41 of the Amended Order of Conditions. The plan changes are consistent with the approved design.The revised plan does not result in an adverse impact to the wetland resource areas or to water quality at Osgood Pond. As with the original and Amended NOI filings, the vast majority of the proposed work will occur within existing disturbed and/or impervious areas. No work will occur within wetland resource areas. Pre- development and post-development drainage analysis points have not changed compared to the approved design, and the proposed site layout has not changed. Consistent with the approved design, all bioretention areas are sized to treat the 0.5-inch storm event at a minimum, and the 1-inch storm event to the maximum extent practicable,for water quality treatment. Consistent with the approved design, post-development peak discharge rates do not exceed pre-development peak discharge rates due to the reduction in impervious cover. An erosion and sedimentation control barrier has already been implemented as part of approved demolition activities to protect downgradient resource areas, and construction-related impacts will be minimized and restored upon completion of construction. A stamped hard copy and the required $200 filing fee for this Modification Request will be provided under separate cover. If you have any questions or require any additional information, please do not hesitate to contact me directly. Sincerely, HORSLEY WITTEN GROUP, INC. Jonathan A. Ford, P.E. Senior Project Manager—Community Resign Enclosures cc: Seth Zeren & David Steinbergh, RCG LLC .... .......................... 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