20 Ladd Ave Outlet Summary.pdfBerkshireDesignGroup
July 21, 2021
Sarah LaValley
Conservation/Preservation Planner (CPA, wetlands)
125 Locust Street
Northampton, MA 01060
RE: 20 Ladd Ave – Order of Conditions Appendix A Item 35
Summary of Outfall Condition
Sarah,
The purpose of this letter is to address item 35 in Appendix A of the Order of Conditions issued by the
Conservation Commission to 20 Ladd Ave (MassDEP File Number: 246-0749).
Item 35 ordered the condition of the existing outfall from the onsite catch basin to the Mill River be assessed
and documented prior to the pre-construction meeting.
Two existing catch basins are located at the site, as shown on the attached ‘L3.0 Utilities Plan’ (revised
7/15/2021).
Catch Basin #1 has been found to have a 4-inch outlet. The outlet carries water, but the outfall could not be
located.
Catch Basin #2 has been found to have a 12-inch HDPE outlet in good condition. The pipe was clogged at the
time of inspection but has been cleared and is currently functional.
The original NOI plan called for discharge to Catch Basin #1, due to a more convenient connection point. Based
on this new information, the system has been updated to make use of the 12-inch outlet from Catch Basin #2.
Catch Basin #1 will be retained and drainage will be routed through the structure.
Please let us know if you have any questions on this information, or if the Commission requires any additional
information.
Sincerely,
Berkshire Design Group
Chris Chamberland, P.E.
Principal
IRR
SS
S
No CleanoutFound This Area
Gravel
CB
Rim:182.95'
CB
Rim:179.83'
(4) Bollard
CB
Rim:187.53'
CB
Rim:187.51'
Gas
Meter
Gas TestValveCBRim:191.83'CBRim:192.31'SMHRim:191.72'
#20
3 Story
Brick Building
1 Story
Brick Building
1 StoryConc. Block Building1 StyWoodBuilding
Ladd AvenueGravelConcrete WalkConcrete
Block Wall
Gravel
1 Story
Conc. Block
1 Story
Metal
GasValve GasMeterBollards1 StyWood
Entry
SignPostWood Post/ChainGate
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AC-10CONDENSINGUNITAC-6AC-9AC-4AC-3AC-2AC-1AC-9CU-1
AC-5AC-8DDDDDDDDD D D DDDDDDDDD
D D D DDDDDDDDDEE E ELECTRICAL CONDUITSEE MEP DRAWINGSFOR SIZINGWWWWWWW W W W W W W W W W W W W
WEXISTING 6" FIRE SERVICE(SEE NOTE 11)NEW 4" DOMESTIC SERVICE WITH4X6 D.I. REDUCERNEW 6" GATE VALVE PER DPW REQ.W W W W W W W W W W W W W WW WEXISTING 1" DOMESTIC SERVICETO BE ABANDONEDCUT AND CAP EXISTING 1" DOMESTIC SERVICENEW 6" FIRE PROTECTION SERVICENEW 6" GATE VALVE PER DPW REQ.WWWWWWWWCUT AND CAP SERVICECONNECTION AT MAINEMERGENCYGENERATORSSSSSSSSSSSSS SSEXISTING SEWER FORCE MAIN TO REMAINCONTRACTOR TO FIELD VERIFY LOCATIONSSSSE E E E E E E E E E E E E E
EXISTING ELECTRIC CONDUIT/SERVICEDISCONNECT & ABANDON IN PLACELIMIT OF 200' RIVERFRONT AREACATCH BASIN #2EX 12" INVERT OUT 176.87 (PER SITE CONTRACTOR)NEW INVERT IN 177.010" HDPE @2.0%CONNECT DOWNSPOUT TOSTORM DRAIN WITH 6" PVC (TYP.)CATCH BASIN #1EX 4" INVERT OUT 180.85 (PER SITE CONTRACTOR)NEW 8" INVERT 179.10 (MIN.)EXISTING 4" OUTLET PIPE TO REMAIN8" HDPE FOR ROOF DRAINAGE@2.0%PICK UP DRAINAGE FROMFORMER SHED AREAAS DIRECTED IN THE FIELDINV 181.9 (MIN.)SOLID HDPE STORM DRAINCONNECT TO FOUNDATION DRAINAGESIZE TO MATCH DRAIN EXITING BUILDINGSEE ARCHITECTURAL DRAWING FOR CONTINUATIONFOUNDATION DRAIN SHALL BE SEPARATEFROM ROOF DRAINAGEREMOVE EXISTING POST INDICATOR VALVEINSTALL NEW 6" GATE VALVE PERNORTHAMPTON DPW REQUIREMENTSLOCATE, CUT, AND CAP EXISTINGWATER SERVICE, PER DPW REQ.SEE NOTE 17NEW 6X6 D.I. TEEE EE E E E E E E E E E E
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T ELECTRIC CONDUITSEE MEP DRAWINGS FOR SIZINGUNDERGROUND COMMUNICATION CONDUITFROM UTILITY POLE, SEE MEP DRAWINGSPAD-MOUNTED TRANSFORMERCONFIRM PAD SIZE WITH UTILITY CO.SEE DETAILPROTECT WITH BOLLARDS ONPARKING LOT SIDENEW UTILITY POLECONFIRM LOCATION WITH UTILITY CO.Date:Drawn By:Project Number:Revisions:Sheet DescriptionSheet NumberChecked By:PRINTED:FILE PATH:11 Ninth StreetSuite 120Columbus, GA 31901P. (706) 571-6923F. (706) 571-6928IMPORTANT NOTICE THIS DOCUMENT ISCONFIDENTIAL. PLEASE DO NOT REPRODUCE THISDOCUMENT IN ANY WAY OTHER THAN WHAT ISNEEDED TO PERFORM WITHIN THE SCOPE OF YOURWORK. PLEASE RETURN THIS DOCUMENT TOCOMMUNITY GROWTH PARTNERS, LLC AND 2WR +PARTNERS UPON COMPLETION OF YOUR WORK ORDESTROY. IF YOU ARE USING ELECTRONIC COPIES,PLEASE DELETE THEM FROM YOUR SYSTEM ONCEYOUR WORK IS COMPLETED.THIS DOCUMENT, AND ANY AFFILIATEDARCHITECTURAL DESIGN, CONSTRUCTION, SECURITY,AND PLANNING DOCUMENTS ("AFFILIATEDDOCUMENTS") ARE CONFIDENTIAL AND CONTAINPROPRIETARY DATA AND INFORMATION OFCOMMUNITY GROWTH PARTNERS, LLC AND 2WR +PARTNERS. THIS DOCUMENT, AND ANY AFFILIATEDDOCUMENTS SHALL ONLY BE VIEWED/USED BYINDIVIDUALS AND ENTITIES THAT HAVE BEENEXPLICITLY AUTHORIZED IN WRITING BY COMMUNITYGROWTH PARTNERS, LLC AND 2WR + PARTNERSNONDISCLOSURE AGREEMENT, AND SHALL BEVIEWED/USED SOLELY FOR THE PURPOSE STATED INSUCH AUTHORIZATION. ANY COPYING,REPRODUCING, MODIFYING, DISTRIBUTING,DISPLAYING, OR COMMUNICATING THE CONTENTS OFTHESE DOCUMENTS, BY ANY MEANS, IS STRICTLYPROHIBITED..1/19/2021 3:26:38 PMC:\Users\alex\Documents\20-692 Community Growth-Northhampton CENTRAL_alex@2wrarch.com.rvt
L3.0UtilitiesPlan20 LADD AVENUENORTHAMPTON, MACOMMUNITYGROWTHPARTNERS20-692CheckerNo.DateDescriptionCENCCUTILITY NOTES1.All materials and construction methods shall conform to theconstruction standards and specifications of the City ofNorthampton.2.All dimensions, elevations and layout shall be verified in thefield by the contractor prior to beginning work.3.All new or adjusted manholes, gas gates, water gates andwater services to be flush with finished grade.4.All new or adjusted catch basin rims shall be set 1/2 inchbelow finished grade.5.Notify the Landscape Architect of any discrepancies prior toconstruction.6.All water lines shall have a minimum of 5' of cover over thecrown of pipe. Water mains and services shall have aminimum of 2' horizontal separation from the outside of wallof any catch basin structure.7.Thrust blocks shall be constructed for all water lines at allangles, bends, branches, plugs and wherever else is necessaryto prevent disruption of proper functioning of the line.8.All sanitary line inverts are shown from centerline tocenterline of sewer manhole. The Contractor is responsiblefor providing a minimum 0.1' drop from inlet invert to outletinvert (2.0% channel) unless otherwise noted.9.It is the responsibility of the contractor to coordinate alllocation of utility lines with appropriate utility companies anddig safe before and during construction.10.Coordinate with electric mechanical, electric and plumbingplans for location of HVAC, condenser, emergency generatorand any other equipment.11.All piping within 10' of the foundation wall of the new buildingwill be performed under Division 22 (Plumbing) of thetechnical specifications. All electrical/communications conduitwithin 10' of the foundation wall of the new building will beperformed under Division 26 (Electrical) of the technicalspecifications. All other underground utility piping and conduitwill be performed under Division 33 (Utilities) of the technicalspecifications.12.The contractor shall obtain all required utility connectionpermits. All work shall comply with the standards of theNorthampton DPW.13.This plan shows the approximate location of water utilitiesbased on markout by Northampton DPW. Record drawingswere not accessible. The Contractor shall field verify thelocation of existing service lines prior to the start of work.14.Cut and Cap Existing 1" Domestic Service at the building entrypoint and at the street.15.Install new 4" Ductile Iron Domestic Service via a 6"X4"tapping sleeve off of the existing 6" Fire Service. Include a 4"gate valve after tapping sleeve. Tap location shall be 5 feetfrom the exterior of the building.16.New 4" Ductile Iron Domestic Service shall be reducedimmediately inside the building where a 2" meter shall beinstalled.17.The Contractor shall investigate the existing domestic waterservice to remain to determine if the service originates fromthe house at 30 Ladd Ave. If service originates at the house,the Contractor shall cut and cap the service at the house,otherwise cut and cap at the 20 Ladd Ave. building.BerkshireGroupDesign1-29-2021FOR PERMIT7/15/2021RFI'S 21, 22, 23, 24