Quarter 2 - Massachusetts Water Resources Authority

ProjectCAM004Outfall andWetland BasinCourt Milestones in Schedule Seven(Shaded milestones are complete.)CommenceDesignCommenceConstructionCompleteConstructionApr 11 Apr 13Jul 98Status as of December 31, 2012Cambridge continues to make progress with construction of the$16.8 million CAM004 stormwater outfall and wetland basin($3.9 million MWRA share), which Cambridge commenced inApril 2011. During the past quarter, Cambridge’s contractorcompleted excavation and grading of the main basin andvegetative plantings. The contractor continues to install thepedestrian overlook at the Oxbow area, construct theboardwalks across the basin area and, and grade the multi-usepath running along the south side of the basin that is partof the Massachusetts Highway Department’s new bikeway.The contractor also completed installing all sections of thestormwater outfall conduit except for the section alongWheeler Street, which it will commence installing in January.The contract is approximately 85% complete. Verizon andCambridge were able to overcome utility relocation delaysalong Wheeler Street, and Cambridge has implemented arecovery schedule that accommodates substantial completion byApril 2013, in compliance with Schedule Seven.Cambridge completed four initial construction contracts for thisproject several years ago and recently awarded another contract(Contract 8A) and plans to award two additional contracts,(8B and 9) to complete the project.Cambridge/AlewifeBrookSewerSeparationCAM004 SewerSeparationJan 97Dec 15Sep 12Contract 8A Construction NTP 9/29/12Contract 8B Design 60% completeContract 9 Design NTP 1/1/13Cambridge has informed MWRA that its capital cost estimatefor this project, together with updated costs for the otherAlewife related CSO projects, has increased to $88 million(the current MOU/FAA total award amount for the Cambridgeprojects is $60 million). Cambridge has also informed MWRAthat it may not be able to complete Contract 9 by the December2015 milestone in Schedule Seven, due to additional contractwork, extensive utility relocations and the need to offset workin Contracts 8B and 9 to avoid cumulative traffic impacts onHuron and Concord avenues.MWR003 Gateand RindgeAve. SiphonSOM01AConnectionRelief andFloatablesControlApr 12Aug 14 Oct 15Sep 13 Jun 14MWRA has received the Final Preliminary Design Report andthe first 100% design submission for the SOM01A project.Staff are reviewing the plans and specifications. The contract isscheduled to commence in September 2013, in compliance withSchedule Seven. The consultant continues with the hydraulicmodeling of alternatives for the MWR003/Rindge Ave. Siphonproject, with the goals of optimizing the performance of theparallel Alewife Brook Sewer and Alewife Brook Conduit,attaining the mandated long-term levels of CSO control, andproviding adequate hydraulic relief in extreme storms. Staffcontinue to coordinate with DCR and the CambridgeConservation Commission as needed. MWRA’s FY13 CIPincludes $4.1 million for this project.Other CSO Related WorkSouth Dorchester Bay Sewer Separation Post-Construction Inflow RemovalBWSC continues to investigate alternatives for removing additional stormwater inflow from its Dorchester Interceptor or otherwise relievinghydraulic conditions in the interceptor during extreme storms. BWSC plans to issue an interim report in early 2013 and a final report withrecommendations by spring 2013. Through flow monitoring and field investigations, BWSC has found numerous locations of stormwater inflow intosanitary sewers. The majority involve catch basin laterals. BWSC crews are currently sealing the locations that can be eliminated by trenchlessmethods. BWSC also recently advertised a $625,000 construction contract for the relocation of seventeen catch basin connections to an existingstorm drain. MWRA’s FY13 CIP includes a total of $5.6 million for this inflow removal effort.18