Bear Swamp is a 600MW hydro power project. It is located on Deerfield river/basin in Massachusetts, the US. The project is currently active. It has been developed in single phase. Post completion of construction, the project got commissioned in 1974.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Hydropower 600 600 Active Massachusetts, the US New England Power


The project was developed by New England Power. The project is co-owned by Brookfield Renewable Partners and Emera, with their respective ownership stake of 50% each.

Bear Swamp is a pumped storage project. The gross head of the project is 234.696m. The total number of penstocks, pipes or long channels that carry water down from the hydroelectric reservoir to the turbines inside the actual power station, are 2 in number. The penstock length is 106.68m. The penstock diameter is 5.334m. The project generated 192 GWh of electricity.

Development Status

The project got commissioned in 1974.

Power Purchase Agreement

The power generated from the project is sold to Long Island Power Authority under a power purchase agreement.

Contractors Involved

Hitachi Mitsubishi Hydro was selected as the turbine supplier for the hydro power project. The company provided 2 units of francis turbines, each with 300MW nameplate capacity.

Hitachi Mitsubishi Hydro supplied 2 electric generators for the project.

About New England Power

New England Power Company (NEPC) is a Massachusetts based company, engaged in power transmission in wholesale quantities to other electric utilities. The company is a wholly owned subsidiary of National Grid USA. NEPC transmits its electricity through approximately 2,361 circuit miles of transmission lines and approximately 125 substations. The company distributes electric energy to four New England electricity delivery companies of National Grid USA that include Massachusetts Electric Company, The Narragansett Electric Company, Granite State Electric Company and Nantucket Electric Company. NEPC also holds interests in inactive nuclear power plants. The company has spanned its operations throughout the Massachusetts, New Hampshire, Connecticut, Rhode Island, Maine, and Vermont regions. NEPC is headquartered in Westborough, Massachusetts, the US.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.