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November 26, 2021

Boundary, US

By Carmen

Boundary is a 1,039.8MW hydro power project. It is located on Pend Oreille river/basin in Washington, the US. The project is currently active. It has been developed in single phase. Post completion of construction, the project got commissioned in 1967.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Hydropower 1,039.8 1,039.8 Active Washington, the US Seattle City Light


The project is developed and owned by Seattle City Light.

Boundary is a reservoir based project. The hydro reservoir capacity is 108.439 million cubic meter. The gross head of the project is 80.162m. Boundary underwent through rehabilitation & modernization during 1997-2006.

The hydro power project consists of 2 turbines, each with 158.4MW nameplate capacity.

The hydro power project consists of 2 turbines, each with 161.5MW nameplate capacity.

The hydro power project consists of 2 turbines, each with 200MW nameplate capacity.

Development Status

The project got commissioned in 1967.

Contractors Involved

Toshiba Energy Systems and Solutions supplied 2 electric generators for the project. The generator capacity is 210 MVA.

About Seattle City Light

Seattle City Light (Seattle City) is an electric utility that offers electricity distribution and related energy services. The utility provides services such as streetlight repair services, payment arrangements, bill payment, utility discount program, meter route improvement, power lines service, vegetation management, power restoration services, and budget billing, among others. It operates through its transmission lines and electric substations. Seattle City also operates solar and hydro electric projects. The utility provides electrical power to commercial, re-modelers, developers, residential, industrial, and business customers in Washington, the US. Seattle City is headquartered in Seattle, Washington, 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.

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