08/12/2019 BOARD OF SELECTMEN Agenda Packet

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Executive Summary Preamble In June of 201'4 the Draft Recommended Plan and Draft Environmental Impact Pepo�rt DRP/DEIR was submitted as the third of four reports as parte of the Town of Mashpee Is Comprehensive Planning Process. It presented the recommendations of this planning process to address the nitrogen Total Maximum Gaily Loads TMC Ls established for Popponesset Bay and Waquoit Bay's eastern b�as,in; it discussed the mitigation measures and implementation approach for Mashpee (and its neighboring communities within the project planning area)to address the, needs as identified in previous documents.. The Comprehensive Wastewater Management Plan (CWMP) is the culmination of multiple documents, the last of which is, the Final Recommended Plan and. Final Environmental Impact Report (FPP/'FElR or .The Plan). This report is the last of four documents required as part of the Massachusetts EnvironmentalPolicy Act(MEPA)/Cape Cod Commission (CCC) Development of Regional Impact(DRI)joint review process.. The Plan is the result of over 15 years of effort in examining Mashpee's needs and coordinating with the efforts of the Massachusetts Estuaries Project(MEP) and,'most recently, the Cape Cod Commission's 20 Planning efforts. This has resulted in a 25-plus year implementation schedule allowing mid-course corrections to occur as part of the Adaptive Management part of the process. The Project Planning ,area (PPA) i'nclud'es all of Mashpee and portions of the neighboring communities of Barnstable, Falmouth and Sandwich that fall within the Po�pponesset Bay watersheds or eastern Waquiot Bay watersheds. The plan is predicated on the use of shellfish in the following areas: Popponesset Bay/ Popponesset Creek, ookway Bay, Mashpee River and Shoestring Bay on the Popponesset Bay watersheds side and in amblin Pond, Little River,, Jehu Pond and Great River .on the Waquiot Bay side. Removal of the remaining balance of nitrogen will rely on a combination of traditional infrastructure (sowers), stormy ater improvements through current best management practices ( MPs) and fertiliser reduction through the neer bylaws/regulations in Mashpee and Falmouth. The traditional infrastructure is primarily focused in the Mashpee River watershed in Phase I with a shift to include the + uashnet/Moonakis River watershed in Phase 2. The efforts in the Quashnet/Mo�onakis, watershed will depend on the findings of the proposed "soft solution's flushing analysis for the Moonakis River and,, ultimately, the availability of Joint Base Cape Cod (JBCC)for a regional treatment solution. Monitoring and additional modeling are proposed for tracking performance throughout the 0_30 year planning period. The Adaptive Management Plan is banked by a It Plan B,1' option to consider full traditional infrastructure in the needed areas at build-out if increased future loads or lesser performance of the adaptive approaches are seen over the planning period. TMDL compliance/MEP modeling points will be used to track performance and allow for mid-course corrections through adaptive management. The estimated capital cost for Phase I is, approximately $34 million, and, depending on shellfish performance and adaptive management, TMC L compliance is estimated between $220 and $3610 million. 8612001.x4 Torn of l hpee Sewer Commission ES-I Final Recommended Plan/Final'Environmental Impact Report