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January 4, 2022

Horse Mesa PSP, US

By Carmen

Horse Mesa PSP is an 114.3MW hydro power project. It is located on Salt river/basin in Arizona, the US. The project is currently active. It has been developed in single phase. The project construction commenced in 1924 and subsequently entered into commercial operation in 1927.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Hydropower 114.3 114.3 Active Arizona, the US Salt River Valley Water User’s Association


The project was developed by Salt River Valley Water User’s Association and is currently owned by U.S. Department of the Interior with a stake of 100%.

Horse Mesa PSP is a pumped storage project. The hydro reservoir capacity is 302.19 million cubic meter.

Development Status

The project construction commenced in 1924 and subsequently entered into commercial operation in 1927.

Contractors Involved

GE Energy (Norway) was selected as the turbine supplier for the hydro power project. The company provided 1 unit of pump turbine with 114MW nameplate capacity.

Westinghouse Electric supplied electric generator(s) for the project.


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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