Grandfather Falls P-1966

General information

Waterway  Wisconsin River
Current status   Active license 
Type of facility Conventional Hydro
Mode of hydropower generation Peaking
Type of permit FERC License

FERC information

FERC docket # P-1966
FERC project name Grandfather Falls
Permit issued 4/9/88
Permit expiration 3/27/18

Ownership and operation

Owner Wisconsin Public Service Corp
Owner type Investor-Owned Utility
Year first online (conventional hydro) 1938
Transmission or distribution system owner American Transmission Co

Power and generating capacity

Number of units 2
Total capacity from hydraulic turbine-generator units within each plant 17.2 MW
Average annual net hydropower generation 82,921.8 MWH

The Grandfather Falls Dam diverts flow on the Wisconsin River, dewatering an incredible piece of river. Photo by Thomas O’Keefe.

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