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Home My WebLink AboutConsultant Review - 15 TIMBER LANE 7/17/2007 01 6A TOWN OF NORTH ANDOVER PLANNING BOARD ENGINEERING REVIEW OF SITE PLAN AND WATERSHED SPECIAL PERMIT FOR CONFORMANCE WITH THE TOWN OF NORTH ANDOVER ZONING BYLAW Site Plan Title: 15 Timber�Lane VHB No..: 09280.34 Site Plan Location: 15 limber Lane,North Andover-,MA Applicant: H.David&Allyson Fournier, 15 Timber Lane,North Andover,MA Applicant's Engineer-:.Cammett Engineering,29*7 Elm Street,Amesbury,MA Plan Date: March 21,2007 Review Date: 07-17-07 The plan was reviewed for conformance to the 1972 T own of'Noith Andover Zoning Bylaw Oast amended July 10,2006). The Applicant has submitted the following information for VHB's review: • Application fox Watershed Special Permit,dated March 20,2007 • Certified Abutter's List;dated.June 7,2007 • "Stoimwatet Analysis"report,dated March 20,2007 • "Watershed District Special Permit Plan, Single Family Dwelling,15 Timber Lane,North Andover"—1 Sheet,dated Match 20,2007 The following comments note non-conformance with specific sections ofthe Zoning Bylaw or questions/comments on the proposed design and VHB's recommendations/suggestions Town ol'North Andover ZoninLr Bylaw 1. (4 1363 c,ii) The Applicant has proposed the following,which are allowable-under-Special Permit: a. (1) Change in topography. b- (2)Cutting or removal of vegetation. c. (4)Replacement of permanent structure. c. d. (5)Discharge of'stoirnwater junoff. e (7)Construction of'a structure with expansion by less than fifty percent of the gloss floor area ofthe existing structure.. 2. (4.136 4.c iii) The"Stoimwater Analysis"report includes a statement that there will be no significant degradation of water quality or quantity entering Lake Coebichewick. 3.. (4..136.4 c.iv)Per this section,proof is required that there are no reasonable alternatives outside of Non-Distuibance and Non-Discharge Buffer Zones for the proposed work.Has the Applicant prepared any alternate site layouts? General Site Plan/Drainage Comments 4. Is the existing shod to be removed or retained/relocated? 5 Please include on the plans pipe size and material information fbi the foundation drain \\\Ma%vatr\te\09280 34\docs\memos\0928034-15 limber lane-review]doc 6. The end treatments at the 12"culvert are unclear. VHB recommends flared end sections with stone at the outlet to prevent erosion. 7. VHB recommends revising the inlet header detail or adding a note to the detail that the infiltration system consists of five spans,not four as shown on the detail 8 Please explain the purpose of the 60mi1 HDPE membrane around the infiltration system as shown on the plans VHB suggests showing the membrane on the infiltratot system detail or adding an additional detail to clearly show installation requirements,such as depth. 9. Please explain why a minimum 10 minute time of concentration was used. Typically,5 minutes is used as a minimum when a site specific time is not calculated It is recommended that the Applicant provide WRIT TEN RE,SPONSE to the issues and comments contained herein. Reviewed by: Date: l� v ee athan Civil Engineer—Highway and Municipal �G� —7 y Checked by: � Date: < Ti othy B c tosh,P.E. Project Manager—Highway and Municipal 2 \\\'Aawatr\te\o92M.34\dots\memos\0928034-15 limber L.ane-reviewl doc I OWN OF NORTH ANDOVER PLANNING BOARD ENGINEERING REVIEW OF SITE PLAN AND WATERSHED SPECIAL PERMIT FOR CONFORMANCE WITH THE TOWN OF NORTH ANDOVER ZONING BYLAW Site Plan Title: 15 Timber-Lane VHB No,.: 09280.34 Site Plan Location: 15 Timber-Lane,North Andover-, MA Applicant: H David&Allyson Fournier, 15 Timber Lane,North Andover,NIA Applicant's Engineer-: Cammett Engineering,297 Elm Street,Amesbury,MA Plan Date: July 27,2007 Review Date: 08-7-07 VHB has reviewed the Applicants responses to out original comments.. The Applicant has addressed our previous comments and no additional review is required at this time•, See below for additional details.. The plan was reviewed for conformance to the 1972 Town of North Andover Zoning Bylaw(last amended July I0,2006) The Applicant has submitted the following information for VHB's review: • Response to comment letter dated July 27,2007 to the NAPB • Revised"Stoirriwatei Analysis"report,dated July 27,2007 • Revised"Watershed District Special Permit Plan,Single Family Dwelling, 15 Timber Lane, North Andover"—1 Sheet,dated July 27,2007 Town of'Noirth Andover Zoning Bylaw L (4136.3c.ii) The Applicant has proposed the following,which are allowable under Special Permit: a. (1) Change in topography, b (2)Cutting or removal of vegetation c (4)Replacement of a permanent structure. d, (5)Discharge of storinwater runoff.. e. (7)Construction of structure with expansion by less than fifty percent of the gross floor area ofthe existing structure. No response is required,comment addressed, 2 (4.136 4.c.Jii) The"Stormwater Analysis"report includes a statement that there will be no significant degradation of water quality or quantity entering Lake Cochichewick. No response is required,comment addressed, 3. (4.1.36.4.c iv)Per this section,proof s required that there are no reasonable alternatives outside of the Non-Disturbance and Non-Discharge Buffer-Zones for the proposed work.Has the Applicant prepared any alternate site layouts? Comment addi essed., N\Mawatr\te\09280.34'\docs\memos\0928039-15 Iimberl.ane-revlewldoc i General Site Plan/Drainage Comments 4. Is the existing shed to be removed or retainedh elocated? Comment addressed.. 5. Please include on the plans pipe size and material information for the foundation drain Comment addressed.. 6. the end treatments at the 12"culvert are unclear. VHB recommends flared end sections with stone at the outlet to prevent erosion. Comment addressed.. '7 VHB recommends revising the inlet header detail or adding a note to the detail that the infiltration system consists of five spans,not four as shown on the detail Comment addressed.. 8. Please explain the purpose of the 60mil HDPE membrane around the infiltration system as shown on the plans VHB suggests showing the membrane on the infiltrator system detail or adding an additional detail to clearly show installation requirements,such as depth Comment addressed, 9 Please explain why a minimum 10 minute time of concentration was used. I ypically,5 minutes is used as a minimum when a site specific time is not calculated. Comment addressed. 2 \\Mawatr\te\09'._80 34\dots\memos\0928034-15limber Lone-review2 do aka