Northfield Mountain P-2485

General information

Waterway  Connecticut River
Current status   Active license 
Type of facility Pumped Storage
Mode of hydropower generation Peaking
Type of permit FERC License

FERC information

FERC docket # P-2485
FERC project name Northfield Mountain Pumped Storage
Permit issued 5/9/68
Permit expiration 4/26/18

Ownership and operation

Owner FirstLight Power Resources Services LLC
Owner type Wholesale Power Marketer
Year first online (pumped storage) 1972
Transmission or distribution system owner Western Massachusetts Electric Company

Power and generating capacity

Number of units 4
Total capacity from pumped storage turbine-generator units 1,168.0 MW
Pumped storage gross generation in megawatt hours for each powerplant 940,062.1 MWH

A partial settlement agreement was signed on March 31, 2023 that provides important fish and wildlife protections at the Turners Falls (p-1889) and Northfield Mountain (p-2485) projects, including improved fish passage, more naturalized flow, improved habitat, and two mitigation funds. Signatories included HRC members Appalachian Mountain Club, American Whitewater, and New England FLOW, as well as the National Marine Fisheries Service, US Fish and Wildlife Service, MA Division of Fisheries and Wildlife, The Nature Conservancy, Crab Apple Whitewater, Zoar Outdoor, and licensee First Light Power. Read the press release from the US Fish and Wildlife Service.

Read the agreement here.

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