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November 24, 2021

John Day, US

By Carmen

John Day is a 2,160MW hydro power project. It is located on Columbia river/basin in Oregon, the US. The project is currently active. It has been developed in single phase. The project construction commenced in 1958 and subsequently entered into commercial operation in 1968.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Hydropower 2,160 2,160 Active Oregon, the US


The project is currently owned by The US Army Corps of Engineers Walla Walla District.

John Day is a run-of-river project. The gross head of the project is 30.8m. John Day underwent through rehabilitation & modernization during 2013. The project cost is $511m.

Development Status

The project construction commenced in 1958 and subsequently entered into commercial operation in 1968.

Contractors Involved

Andritz Hydro was selected as the turbine supplier for the hydro power project. The company provided 16 units of kaplan turbines, each with 135MW nameplate capacity.

GE Renewable Energy supplied 16 electric generators for the project. The generator capacity is 142.1 MVA.


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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