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S. 131 Upper Neponset Valley Sewer SystemProject Purpose and Benefits Contributes to improved public health Provides environmental benefits Improves system operability and reliabilityThe Upper Neponset Valley Sewer is hydraulically deficient resulting in frequent community system back-ups andinterceptor overflows during wet weather to adjacent residential areas and water bodies in Brookline, Boston,Newton, and Dedham. Construction of a new replacement interceptor will reduce chronic wastewater overflowsand surcharging during wet weather and improve service and water quality.Project History and BackgroundThe Upper Neponset Valley Sewer constructed between 1896 and 1902, extends approximately four miles throughWest Roxbury and Newton, and receives wastewater from West Roxbury, Brookline, Newton, and a small portionof Dedham. Based on the results of the 1994 Combined Sewer Overflow Master Plan, work on Section 530 inNewton and West Roxbury has been added to this project because the hydraulic improvements are needed in thissection.The 1984 Wellesley Extension Sewer Facilities Plan/Environmental Impact document estimated that the UNVSoverflowed an average of six to ten times per year with occurrences lasting as long as ten days. The FacilitiesPlan/EIR indicated that installation of a new interceptor would be the most cost-effective solution to these problems.With the increased capacity of the new interceptor, chronic wastewater overflows during wet weather will bereduced, improving water quality. The project will increase the hydraulic capacity in the Upper Neponset ValleySewer by 8 mgd, through the construction of replacement sewers, to the level of service provided to all MWRAsewer member communities. The project will eliminate surcharging and overflows during the one-year, six-hourDEP designated design storm, with no increase in downstream overflows. It will also reduce overflows for 5-yearand above storms. The project includes design and construction of sections 685 and 686 replacement sewers forsections 526 to 529. This construction contract was awarded in March 2005 and was completed in March 2008.The project also includes design and construction of Section 687 to replace Section 530 which was awarded inOctober 2006 and completed in November 2007.ScopeSub-phaseDesigns/CS/RIResidentengineering &inspectionBoston PavingReplacementSewer Sections685-686constructionReplacementSection 687constructionScopeCompletion of design and provision of construction services during the construction phases.Resident engineering and inspection during construction of the two contractsPayment to the City of Boston for paving work on city streets.Installation of 15,780 feet of new sewers within public roadways to reduce overflows toadjacent residential areas and water bodies in West Roxbury.Installation of 8,500 feet of new sewers to reduce overflows to adjacent residential areas andwater bodies in West Roxbury and NewtonInterception and Pumping - 19
Expenditure Forecast (in $000s) and Project StatusTotalBudgetPaymentsthru FY10RemainingBalanceFY11 FY12 FY09-13 FY14-18 BeyondFY18$55,056 $53,754 $1,302 $134 $1,168 $1,906 $0 $0ProjectStatus5/1197.7%Status as % is approximation based on project budget and expenditures. Constructionon Sections 685 and 686 was completed in March 2008. Section 687 was completedin November 2007.Changes to Project Scope, Budget, and ScheduleProject Cost Scheduled Completion Date FY09-13 SpendingFY11 FY12 Chge. FY11 FY12 Chge. FY11 FY12 Chge.$54,426 $55,056 $630 Mar-08 Mar-08 None $1,276 $1,906 $630Explanation of ChangesProject cost and spending increased due to revised cost estimate for easements.CEB ImpactNo impacts identified at this time.Interception and Pumping - 20
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Page 8 and 9: TotalContractFY09-13 FY14-18 Beyond
Page 10 and 11: Highlights of changes from FY11 Fin
Page 12 and 13: Dam Projects total project spending
Page 14 and 15: In June 2011, MWRA executed a $32.5
Page 16 and 17: The breakdown of the $574.9 million
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Page 20: Future Risk FactorsDue to the very
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Page 33 and 34: FES/FERSBiofilters Design& Construc
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Page 37 and 38: EquipmentPrepurchaseTechnical Assis
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Page 45 and 46: Sub-phaseInterceptor Renewal#4 Ever
Page 47 and 48: Sub-phaseNut Island Fire PumpBuildi
Page 49 and 50: Sub-phasePrison PointGearbox Rebuil
Page 51 and 52: S. 146 Inspection of Deer Island Cr
Page 53 and 54: S. 206 Deer Island Treatment Plant
Page 55 and 56: Sub-phaseEquipment Replacement:Sout
Page 57 and 58: Sub-phaseUtilities:DI Digester Flar
Page 61 and 62: S. 210 Clinton Wastewater Treatment
Page 63 and 64: S. 211 Laboratory ServicesProject P
Page 65 and 66: S. 271 Residuals Asset ProtectionPr
Page 69 and 70: Channel, East Boston, and Alewife B
Page 71 and 72: Table 1Receiving WaterAlewife Brook
Page 73 and 74: Anticipated operating cost impacts
Page 75 and 76: ProjectCSO SupportCSO Planning andS
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S. 347 East Boston Branch Sewer Rel
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S. 355 MWR003 Gate and SiphonProjec
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S. 357 Charles River CSO ControlsPr
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S. 340 South Dorchester Bay Sewer S
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S. 344 Stony Brook Sewer Separation
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S. 346 Cambridge Sewer SeparationPr
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S. 356 Fort Point Channel Sewer Sep
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S. 358 Morrissey Boulevard DrainPro
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ProjectStatus5/1132.2%Status as % i
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Changes to Project Scope, Budget, a
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By amendment to the Master Planning
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S. 128 Infiltration/Inflow Local Fi
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Integrated Water Supply Improvement
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changes to comply with the Stage 2
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Sub-phaseWalnut Hill Ultra VioletDi
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S. 543 Quabbin Water Treatment Plan
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S. 545 Blue Hills Covered StoragePr
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S. 550 Spot Pond Storage FacilityPr
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In September 2009 construction bega
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Sub-phaseOwner ControlledInsuranceD
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S. 615 Chicopee Valley Aqueduct Red
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S. 597 Winsor Station/Pipeline Impr
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Winsor Station/Pipeline Improvement
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Ware River IntakeValveReplacementCV
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S. 621 Watershed LandProject Purpos
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S. 623 Dam ProjectsProject Purpose
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S. 625 Long Term RedundancyProject
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Expenditure Forecast (in $000s) and
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Sub-phaseEquipmentPurchaseScopePurc
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were intended to prevent electrical
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Sub-phaseDesign CA/RISection 36/WS/
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S. 721 Southern Spine Distribution
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S. 727 Southern Extra High Redundan
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ScopeSub-phaseDesign/CA/RI andConst
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S. 704 Rehabilitation of Other Pump
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S. 722 Northern Intermediate High (
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S. 713 Spot Pond Supply Mains - Reh
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ScopeSub-phaseWatertown MOURouting
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S. 692 Northern High Service - Sect
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ScopeSub-phaseDesign/CS/RI -Revere/
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S. 731 Lynnfield PipelineProject Pu
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S. 618 Northern High Northwest Tran
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Explanation of ChangesProject cost
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S. 753 Central Monitoring SystemPro
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Sub-phaseScopeCovered StorageTank R
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S. 931 Business Systems PlanProject
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Sub-phasePhase V(FY01-10)Scope(Comp
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Sub-phaseNET2020(FY10-FY12)SAN II (
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Sub-phaseNET 2020DITP/SouthboroughS
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Explanation of ChangesProject cost,
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Understanding the Expenditure Forec
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Massachusetts Water Resources Autho
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APPENDIX 3New Capital Projects Adde
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Appendix 3New Capital Projects Adde
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APPENDIX 4Overview of the FY12 Fina
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Program and ProjectTotal BudgetAmou
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APPENDIX 5Master Plan/CIP Status
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Priority Four Important Projects Ri
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Monitor system needs and plan appro
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Appendix 5Master Plan/CIP Status(in
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Subphase/ProjectAppendix 6Project S
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Subphase/ProjectTotalContractAmount
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APPENDIX 7PROJECT/MUNICIPALITY(s)Pr
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APPENDIX 8Municipality and ProjectR
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MunicipalityProject Number/ProjectA
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APPENDIX 8MUNICIPALITY/PROJECT(s)Mu
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Appendix 9ProjectTotal Cost($000)Wa
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Appendix 9S.194 Nut IslandIntermedi
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Appendix 9Waterworks System Improve
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Appendix 9S.681 Southern ServiceImp
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Appendix 9Business & Operations Sup
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APPENDIX 10EXPECTED USEFUL LIFE OF
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Final - Massachusetts Water Resources Authority

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