FERC issues preliminary permit for 666-MW Yellow Medicine County Pump Storage Project

The Federal Energy Regulatory Commission has issued a preliminary permit to Midwest Energy Recycling LLC for the proposed 666-MW Yellow Medicine County Pump Storage Project in Minnesota.

This permit gives Midwest Energy the right to study the feasibility of the project, to be located near the city of Granite Falls on the Minnesota River in Yellow Medicine County.

Project facilities would consist of:

  • Circular 100-acre rockfill embankment (upper reservoir) with a total storage capacity of 3,300 acre-feet and a maximum pond elevation level of 1,089 feet mean sea level
  • 2,400-foot by 1,425-foot rectangular lower reservoir with a total storage capacity of 3,300 acre-feet and a water surface elevation between -1,320 feet msl and -1,420 feet msl
  • 18-foot-inside-diameter morning glory reinforced concrete intake
  • 2,500-foot-long, 18-foot-diameter steel penstock ending in a bifurcation before the powerhouse
  • 200-foot-long by 70-foot-wide and 130-foot-high reinforced concrete powerhouse containing two 333-MW reversible pump-turbine units
  • Transformer gallery
  • 345-kV transmission line to an existing substation

Yellow Medicine County Pumped Storage would generate an estimated 1,450 GWh of electricity annually.

Midwest Energy filed the application July 17, 2018.

The permit issued was effective the first day of November and ends either 48 months from the effective date or on the date that a development application submitted by the permittee has been accepted for filing, whichever occurs first.

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Elizabeth Ingram is content director for the Hydro Review website and HYDROVISION International. She has more than 17 years of experience with the hydroelectric power industry. Follow her on Twitter @ElizabethIngra4 .

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