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Exelon Expansion - Site Plan Overview
Exelon Expansion – Site Plan

Project Location:       34 West and 9 Summer Street
                        Medway Assessors Map/Parcels 66-012, 66-013, 56-001, 56-002, 56-003 56-004
                
Parcel Size:            94 acres                

Type of Permit/Application:     Major Site Plan

Applicant:              Exelon West Medway LLC and Exelon West Medway II, LLC
                        Kennett Square, PA

Property Owner: Exelon West Medway LLC and Eversource Energy

Application Date:       February 9, 2016                

Project Summary:        The proposed project is for an expansion of the existing three-turbine, oil fired, 135 mega-watt West Medway Generating Station peak power generating facility. The planned expansion entails the construction of two 100-megawatt (MW) simple-cycle peaking electric combustion turbine generators and associated equipment and appurtenances on approximately 13 acres of the 94 acre property. Each of the two stacks will be 160’ tall. The generators will run primarily on natural gas using low sulfur diesel oil as a back-up.
 
        The project will interconnect with Eversource via an approximately 1,200 linear foot overhead circuit from a transformer to the Eversource switchyard on the western portion of the Property utilized and controlled by Eversource through an easement agreement. The energy generated by the project will be distributed by Eversource to the Southeast Massachusetts/Rhode Island load zone to help meet energy demand during peak times.

         The project includes a control/administration and facility services building, a trailer-mounted demineralizer system, an enclosed gas compressor station, a one-million gallon fuel oil tank, a 500,000 gallon service water tank, a 450,000 gallon demineralized water storage tank, a 12,000 gallon fully-diked and covered aqueous ammonia storage tank, advanced emissions control equipment, and a perimeter access road.  Access to the site will be controlled via a motorized security gate located off the relocated main site access driveway from Summer Street. The proposed facility will also include full acoustical enclosures for the gas turbines and generators, a 55’ high noise wall, and a full complement of acoustical controls. A 3,080 linear foot lateral interconnection to the existing Algonquin Gas pipeline is also planned along with an associated 14’ x 50’ building to contain flow control and metering equipment, and a 12’ by 16’ building to contain gas monitoring and analysis equipment.

        A Petition to Construct was filed with the Massachusetts Energy Facility Siting Board (EFSB) and a Petition for a Zoning Exemption was filed with the Department of Public Utilities. The Petitions were consolidated and are currently under review by the EFSB. Whether the expansion project is allowed is solely within the jurisdiction of the EFSB. The role of the Planning and Economic Board is limited to addressing various site design and engineering issues only.

        The application, site plan drawings and supporting documentation were filed with the Town of Medway on February 9, 2016. The site plan drawings were compiled by Beals and Thomas of Southborough, MA. The complete application, proposed site plan, and other application documents are on file with the Medway Town Clerk and the Planning and Economic Development office at the Medway Town Hall, 155 Village Street, Medway, MA and may be reviewed Monday through Thursday from 7:30 a.m. to 4:30 p.m. and Fridays from 7:30 a.m. to 12:30 p.m.
        
Application Documents – Click on the document to view or download.  Please be patient. Some of the documents are very large and will take some time to download.

Public Hearing:  The public hearing will begin on Tuesday, March 22, 2016 at 7:45 p.m. and will take place in the School Committee Presentation Room at the Medway Middle School, 45 Holliston Street. Interested persons or parties are invited to review the plans, attend the public hearing, and express their views at the designated time and place. Written comments are encouraged and may be forwarded to planningboard@townofmedway.org.  Questions should be directed to the Planning and Economic Development office at 508-533-3291. It is reasonable to expect that the Board will continue the public hearing to a future date. NOTE - Abutters are NOT re-notified of the dates to which public hearings are continued. Public hearing continuation notices are posted with the Town Clerk and to the Town’s web page.  

2-25-2016