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Preliminary 2025 facility recordOperating

Irma, WI · EIA plant 4063

Grandfather Falls

Grandfather Falls is a hydro power facility in Irma, WI, with 17 MW of operating capacity.

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Operating capacity17 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityWisconsin Public Service CorpEIA-reported operator
Balancing authorityMISOMidcontinent Independent Transmission System Operator, Inc..

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Hydro17 MW
ProposedNo proposed capacity reported
Reported technologiesConventional Hydroelectric

Nearby in WI

Related facilities

WI · 8.1 miAlexander4 MW →WI · 10.0 miMerrill2 MW →WI · 10.1 miTomahawk3 MW →WI · 10.1 miPackaging of America Tomahawk Mill19 MW →

Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source