Wisconsin Power & Light Co — Operated Plants

34 plants · 5.9 GW total capacity · across 3 states

Wisconsin Power & Light Co operates 34 power plants with 5.9 GW total capacity. Primarily solar (20 plants, 1.3 GW). Parent organization: Alliant Energy.

Largest is Columbia (WI) (1112 MW Sub. Coal); oldest active is Prairie Du Sac (1915); newest is Rock County Customer Hosted Solar (2025); top state is Wisconsin (32 plants).

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Subsidiary of Alliant Energy

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Key Stats

Largest fuel
Solar (20 plants)
Largest state
Wisconsin (32 plants)

Plants by State

Wisconsin (32 plants · 5.5 GW)

Minnesota (1 plants · 201 MW)

Iowa (1 plants · 152 MW)

Plants by Fuel Type

Solar (20 plants · 1.3 GW)

Natural Gas (5 plants · 2.5 GW)

Wind (3 plants · 421 MW)

Coal (2 plants · 1.6 GW)

Hydroelectric (2 plants · 43 MW)

Battery Storage (2 plants · 9 MW)