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Home My WebLink About2019 Correspondence Insubstantial Change �I YR"' A N G F R ' L N C I1v11 I RING & Df 5ICA"I tic Nk August 5, 2019 I e Jean Enright, Planning Director North Andover Planning Board 120 Main Street North Andover, MA 01845 RE: Rea St, No Andover, MA Dear Ms. Enright, This office has prepared a revised lot development plan for lots 4 through 7 which are part of the definitive subdivision plan entitled "Improvement of Rea Street"which was approved by the planning board earlier this year. The proposed plan depicts the actual footprints of the homes which will be constructed on the lots. This plan has been approved by the conservation commission and is being submitted to the planning board for their file. As part of the revised plan submittal a revised drainage calculation and report were produced by this office to verify that the stormwater management systems would function as designed and in conformance with the regulations. As a result of small increases in the footprints of the homes the size of infiltration area 2 was increased by adding an additional stormwater chamber to each row of chambers in the system. A copy of the calculations is also attached. If you have any questions, please do not hesitate to call me at 978-435-1324. Thank you, f f Benjamin C. Osgood, Jr., PE Sr. Engineer 13 BRANCH STREET, SUITE 101, METHUEN, MA 01844 T, 978-2 108-177 .. ..,. . . . .... 62 9/25/2019 Town of North Andover Mail-Rea Street Drainage Report .._ _ it NORT ANbOVER Massachuse{ts_ 1 Monica Gregoire <mgregoire@northandoverma.gov> Rea Street Drainage Report John Borgesi <jborgesi@northandoverma.gov> Tue, Sep 24, 2019 at 6:08 PM To: bosgood@rangereng.com Cc: Monica Gregoire <mgregoire@northandoverma.gov>, Jean Enright <jenright@northandoverma.gov>, David Innis <daveinnis@gmail.com> i Monica, I have reviewed the revised submittal from Ranger Engineering and all of my comments have been adequately addressed and I have no further comment. Thank you. -John John J. Borgesi, P.E. Town Engineer Department of Public Works Town of North Andover 384 Osgood Street North Andover, MA 01845 Phone: 978.685.0950 Fax: 978.688,9573 [Quoted text hidden] I https://mall.google.com/mail/ulO?lk=daddl 872e7&view=pt&search=all&permmsgid=msg-f%3A1645596297901739772&simpl=msg-f%3A16455962979... 111 i 9/6/2019 Town of North Andover Mail-Rea Street Subdivision bosgood@rangereng.com <bosgood@rangereng.com> Tue, Aug 6, 2019 at 12:10 PM To: Monica Gregoire <mg re go!re@ north a ndove rma.gov> Cc: Jean Enright <jenright@northandoverma.gov>, Paul Hutchins <phutchins@northandoverma.gov> Good Morning Monica, In regards to the questions you and others have 1 have the following, 1. There is a table of areas on sheet 2 of the plans. This table shows the areas that were approved in the original plan on a lot by lot basis along with the areas on the revised plans. The revised roof areas add up to a total increase of 1,175 square feet. However, the driveway areas have been revised and they are reduced by a total of 614 square feet. 2.The lots did not change and are the same as was approved on the original plans. 3. The homes meet the required 30' front and 30' side setbacks. Feel free to forward any additional questions that may arise. Ben [Quoted text hidden] All email messages and attached content sent from and to this email account are public records unless qualified as an exemption under the Massachusetts Public Records taw. Visit us online at www.northandoverma.gov. Monica Gregoire <mgregoire@northandoverma.gov> Tue, Aug 6, 2019 at 12:14 PM To: John Borgesi <jborgesi@northandoverma.gov> Cc: Jean Enright<jenright@ north andoverma.gov> John, Attached are the Engineer's responses to comments regarding the requested plan changes for Rea Street, Regards, [Quoted text hidden] Monica Gregoire <mgregoire@northandoverma.gov> Thu, Sep 5, 2019 at 3:21 PM To: John Borgesi <jborg esi@ north andove rma.gov> Cc: Jean Enright <je nrig ht@ north andoverma.gov> Hi John, Have you had a chance to look at the proposed changes and review Ben Osgood's 8/6 response? Thank you, Monica [Quoted text hidden] h ttps:lima€I.google-comltrla i llul0?i k=dadd l 872e7&view=pt&sea rchmall&pormth id=thread-f%3A164103386025882 2816&simp l=msg-f%3Al 6410338602... 414 9/6/2019 Town of North Andover Mail-Rea Street Subdivision NORT-NAND,OVER PAassachus is Monica Gregoire <mgregoire@northandoverma.gov> Rea Street Subdivision 10 messages bosgood@rangereng.com <bosgood@rangereng.com> Mon, Aug 5, 2019 at 9:30 AM To: Monica Gregoire <mgregoire@northandoverma.gov> i Benjamin C. Osgood, Jr., PE Senior Engineer 978-435-1324 RANGERIL E Ni;lhil ! I,ll�it; ra l)l `;1Crtt1 LLs ', I:i 8RANC:H5i.5LIIIE tOi hi[fliLI N,iti.'iA(N-w 3 attachments 2019-08.05 Planning Board Cover Letter.pdf 183K 2019-06-14 Rea Street Site Plan Revised.pdf f 4871 K E E 2019.05.17 REPORT.pdf 636K Monica Gregoire <mgregoire@northandoverma.gov> Mon, Aug 5, 2019 at 2:38 PM To: John Borges! <jborgesi@northandoverma.gov> Cc: Amy Maxner<amaxner@northandoverma.gov>, Jean Enright<jenrlght@northandoverma.gov>, Tim Willett <twillett@northandoverma.gov>, Paul Hutchins <phutchins@northandoverma.gov> Hi John, The Developer for Rea Street submitted a revised plan is due to"small increases in the footprints of the homes." Due to the increase, the Project Engineer has proposed an increase in the size in infiltration area 2, to add additional stormwater Chamber to each row of the chambers in the system. Please let me know your thoughts on this proposal. Thank you, https://ma il.goog le.com/mail/u10?ik=d add 1872e7&view=pt&search=all&permthidmthread-f%3Al641033860258822816&sim pl=msg-f%3Al 6410338602... 114 Post Development Lots 4 7 Rea Street,North Andov7ype/if 24-hr 2-yearRainfau=3.15- Prepared by Ranger Engineering&Design,LLC Printed 5117M19 H roCADO 10.00-22 sin 02248 02018 H droCAD Software Solutions LLC Page 14 Summary for Pond 12P:Infiltration Area 5 -- fS iT Inflow Area= 2.541 ac, 13.43%Impervious, Inflow Depth> 0.38" for 2-year event Inflow = 0.72 cfs @ 12.17 hrs, Volume-- 0.081 of Outflow = 0.40 ds a@ 12.00 hrs, Volume= 0.081 af, Atten=44%, Lag=0.0 min Discarded = 0.40 cis @ 12.00 hrs, Volume= 0.081 of Primary = 0.00 cf5 @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method,Time Span=5.00-24.00 hrs,dt=0.05 hrs Peak Elev=162.94'@ 12.45 hrs Surf.Area=0.033 ac Storage--0.008 of Plug-Flow detention lima=(not calculated:outflow precedes inflow) Center-of--Mass det Time=3.5 min(775.5-772.0) Volume Invert AvailStora a Storage Descrietion 41A 162.40' 0.024 of 30.17W x 47.92'L x 2.33'H Field A 0.077 of Overall-0.016 of Embedded=0.061 at x 40.0%Voids #2A 162.90' 0.016 of ADS_StormTech SC310+Cap x 48 Inside#1 Effective Size=28.9"W x 16.0"H=>2.07 sf x 7.12'L=14.7 cf Overall Size=34.0'W x 16.0"H x 7.561 with 0.44'Overlap 8 Rows of 6 Chambers 0.041 of Total Available Storage Storage Group A created with Chamber Wizard Device Routing Irrvert Outlet Devices #2 Discarded 163.37' 10.0D0Racmd Culvert area tration over Surface Primary Pbr�T r. L=20.0' CPP,projecting,no heodwal = 9 Inlet/Outlet Invert-163.3 0.00 =8.1685'P Co=0.900 n=0.013 Corrugated PE,smo interior, Flow Area=0.55 sf rsearded OutFlow Max-0.40 cfs @ 12.00 hrs HW=162.43' (Free Discharge) =Exfiltration(Exfiitration Controls 0.40 cfs) Primary Outflow Max=0.00 cfs @ 5.00 hrs HW=162.40' (Free Discharge) 'L 2--Culvert(Controls 0.00 cfs) - ......... ..