The Commonwealth of Massachusetts Executive Office of Energy and Environmental Affairs 100 Cambridge Street, Suite 900
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The Commonwealth of Massachusetts Executive Office of Energy and Environmental Affairs 100 Cambridge Street, Suite 900 Boston, MA 02114 Charles D. Baker GOVERNOR Tel: (617) 626-1000 Karyn E. Polito Fax: (617) 626-1081 LIEUTENANT GOVERNOR http://www.mass.gov/eea Kathleen A. Theoharides SECRETARY June 12, 2020 CERTIFICATE OF THE SECRETARY OF ENERGY AND ENVIRONMENTAL AFFAIRS ON THE DRAFT ENVIRONMENTAL IMPACT REPORT PROJECT NAME : Auburn Water District Interconnection with City of Worcester PROJECT MUNICIPALITY : Auburn PROJECT WATERSHED : Blackstone and Nashua EEA NUMBER : 16070 PROJECT PROPONENT : Auburn Water District DATE NOTICED IN MONITOR : April 22, 2020 Pursuant to the Massachusetts Environmental Policy Act (MEPA; M.G.L. c. 30, ss. 61- 62I) and Section 11.08 of the MEPA regulations (301 CMR 11.00), I have reviewed the Draft Environmental Impact Report (DEIR) and hereby determine that it adequately and properly complies with MEPA and its implementing regulations. The Proponent may prepare and submit for review a Final Environmental Impact Report (FEIR). Project Description As described in the DEIR, the project consists of an interconnection of the Auburn Water District (AWD) system to the City of Worcester (Worcester) water system. The interconnection will provide a maximum daily transfer of 750 gallons per minute (gpm) for 12 hours per day, for a total of up to 0.54 million gallons per day (mgd) or 197.1 million gallons per year. Approximately 34.1 percent of the Worcester water supply is from the Blackstone River Basin and 65.9 percent is from the Nashua River Basin. Because wastewater from Auburn is discharged into the Blackstone River Basin, the project will involve an interbasin transfer from the Nashua Basin to the Blackstone Basin of 0.36 mgd (65.9 percent of the proposed water transfer). EEA# 16070 DEIR Certificate June 12, 2020 The supplemental water supply is proposed to improve the reliability of the water system. The AWD is permitted to withdraw up to 1.37 mgd from 12 groundwater wells. The system has adequate capacity to meet the average daily demand of 1.16 mgd. However, the AWD would experience water shortages if two or more wells become inoperable during periods of high demand. Several major highways are located near the AWD wells. The roadways present potential sources of contamination from fuel spills and use of road salt, which results in sodium and chloride loading. According to the AWD, the wells have not been contaminated by a fuel spill; however, if one were to occur in this area, the AWD would have to take one or more wells off-line for several weeks while potential impacts to water quality are evaluated. Increasing levels of sodium and chloride in groundwater have forced the closure of one well and could impact others. Protection of the water supply was identified as a top priority in Auburn’s Community Resilience Building Workshop Summary of Findings (2019). The project will include the following activities: • Installation of approximately 450 feet (ft) of 12-inch diameter ductile iron water main from the capped end of Worcester’s water main at the municipal boundary to a proposed pressure reducing valve (PRV)/metering station on Southbridge Street in Auburn; • Construction of the above-referenced 230-square foot (sf) PRV/metering station on a parcel owned by the Massachusetts Department of Transportation (MassDOT) on Southbridge Street; • Installation of 2,650 ft of 12-inch diameter ductile iron water main from the PRV/metering station south along Southbridge Street to Sword Street; • Installation of a 200-ft section of 12-inch diameter ductile iron water main from Southbridge Street to a 10-inch diameter water main in Sword Street using pipe jacking under Kettle Brook and the railroad tracks; and • Installation of a 420-ft long, 4-inch diameter pipe in Sword Street to provide temporary water service during the construction period All construction will occur within the rights-of-way (ROW) of Southbridge Street and Sword Street or within an existing 30-ft wide sewer easement under Kettle Brook. It is anticipated that the project will be constructed in six months starting in Fall 2020. Project Site The site of the proposed interconnection to the Worcester system is located in a mixed-use area near Auburn’s northern border. The PRV/metering station will occupy an approximately 1,540-sf portion of a small (less than 0.1 acres) parcel owned by MassDOT. The PRV/metering station site is located just south of the Auburn-Worcester municipal boundary and is bordered by Southbridge Street to the east, railroad tracks to the west and a commercial property to the north. Installation of the water main under Kettle Brook will take place at the southern end of the project area on Sword Street. Wetland resource areas associated with Kettle Brook include Land Under Water (LUW), Bank and Riverfront Area. According to the Federal Emergency Management Agency’s (FEMA) Flood Insurance Rate Maps (FIRM) (No. 25027C0802E, 2 EEA# 16070 DEIR Certificate June 12, 2020 effective July 4, 2011), the land adjacent to Kettle Brook, including a portion of Sword Street, is located with the 100-year floodplain (Zone AE) with a Base Flood Elevation (BFE) of 488 ft NAVD 88. According to the Natural Heritage and Endangered Species Program (NHESP), the Pine Hill Reservoir, Quinapoxit River and Asnebumskit Brook, which are components of Worcester’s water supply system, contain habitat for four Species of Special Concern, including the Common Loon (Gavia immer), Wood Turtle (Glyptemys insculpta), Brook Snaketail (Ophiogomphus asperses) and Eastern Whip-poor-will (Anstrostomus vociferous). In addition, Asnebumskit Brook and the Quinapoxet River are habitat for 14 warm and coldwater fish species, including five that are listed in the Massachusetts State Wildlife Action Plan (SWAP) submitted to the U.S. Fish and Wildlife Service in 2015. The SWAP identifies the 570 species of greatest conservation need in the Commonwealth, the 24 types of habitat that support these species, and the actions necessary to conserve them. Environmental Impacts and Mitigation The project involves an interbasin transfer of water from the Nashua River Basin to the Blackstone River watershed in which the Town is located. Direct environmental impacts are primarily associated with the construction period, including installation of water mains, pipe jacking beneath Kettle Brook and a limited amount of land alteration associated with construction of the PRV/metering station. The transfer of water from Worcester’s system will support AWD’s ability to maintain a safe and reliable drinking water supply. The project will minimize impacts to wetland resource areas by jacking the water main under Kettle Brook and includes construction-period mitigation measures to minimize sedimentation and erosion and dust and noise impacts. In accordance with the Scope below, potential impacts to rare species will be analyzed in the FEIR. Jurisdiction and Permitting The project is subject to a mandatory EIR pursuant to 301 CMR 1 l.03(4)(a)(2) of the MEPA regulations because it requires Agency Actions and involves a New interbasin transfer of water of 1,000,000 or more gpd or any amount determined to be significant by the Water Resources Commission (WRC). It requires approval in accordance with the Interbasin Transfer Act (ITA) (M.G.L. c.21 ss. 8B-D; 313 CMR 4.00) from the WRC, Approval of Distribution System Modifications for more than 3,300 People from the Massachusetts Department of Environmental Protection (MassDEP) and a Non-Vehicular Access Permit and an easement from MassDOT. The project may require a Conservation and Management Permit (CMP) from NHESP. It is subject to the MEPA Greenhouse Gas (GHG) Emissions Policy and Protocol (GHG Policy). The project will require an Order of Conditions from the Auburn Conservation Commission or, in the case of an appeal, a Superseding Order of Conditions from MassDEP. The Proponent has received Financial Assistance from MassDEP through the Water Management Act (WMA) grant program and the project requires an easement from MassDOT for the key portion of the project site required for construction of the PRV/metering station. 3 EEA# 16070 DEIR Certificate June 12, 2020 Therefore, MEPA jurisdiction is broad in scope and extends to all aspects of the project that may cause Damage to the Environment, as defined in the MEPA regulations. Review of the DEIR The DEIR was generally responsive to the Scope included in the Certificate on the ENF. It described existing conditions and provided an updated description and plans of the project. The DEIR included an expanded alternatives analysis and identified the project’s impacts and proposed mitigation measures. It provided information requested by the WRC regarding the condition and operation of the AWD and Worcester water supplies, expected conditions under which supplemental water may be needed, stream flow conditions and water conservation measures. The DEIR provided a Response to Comments and Draft Section 61 Findings. Alternative Analysis The DEIR included an expanded alternatives analysis. In addition to reviewing the No Action, Church Street Replacement Wells and Silver Street Wells alternatives identified in the ENF, the DEIR evaluated an alternative that would use an existing interconnection with Worcester’s water supply (Existing Interconnection Alternative) and reviewed other potential sources of water that would avoid an interbasin transfer (Other Sources Alternatives). The No Action, Church Street Replacement Well and Silver Street Wells alternatives would avoid an interbasin transfer of water. The No Action Alternative would not satisfy the purpose of the project to improve the resiliency of the AWD system when wells are off-line due to maintenance activities or emergencies, and during periods of high demand. The Church Street Replacement Well Alternative would replace one of the three wells at the Church Street site, which was taken out of service due to sodium and chloride contamination from nearby roads, with a new well.