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Petenwell — Power plant · Hydro · Wisconsin River Power CompanyCastle Rock Lake Solar — Under construction · Solar · WI · 4.5 MW · 6.3 mi away
  • Clean firm
  • Wind & solar
  • Under construction
  • Operating
  • 10 · 100 · 1,000 MW

Petenwell

Power plant · Hydro

Key facts

Power plant · Hydroran 55% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1949
Net generation, 2025
97,225 MWh
Grid
138 kV to American Transmission Co (MISO)
Location
Juneau County, Wisconsin

Output

Net generation MWh by year, 2001 to 2025

Operations detail

Details

Who’s behind it

Owner
Wisconsin Power & Light Co, Wisconsin Public Service Corp

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Technology
Hydro source: “Conventional Hydroelectric”
Age
77 years since 1949
All 5 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Grid
Nerc region
MRO
Report year
2025
Grid voltage kv
138
Transmission owner
American Transmission Co
Balancing authority code
MISO
Balancing authority name
Midcontinent Independent Transmission System Operator, Inc..
Fuel burned (MMBtu), 2025331,733
Capacity factor, 20250.555
Net generation (MWh), 202597,225
Balancing authority codeMISO

Ownership

3 companies3
CompanyRoleShareAs ofSource
Wisconsin River Power Company Operator EIA-860M
Wisconsin Power & Light Co Owner 50.0% Dec 31, 2025 EIA-860
Wisconsin Public Service Corp Owner 50.0% Dec 31, 2025 EIA-860

Timeline

  • In service · EIA-860M

Around this plant

Nearby

within 15 mi
ProjectKindAwayMW
Castle Rock Lake Solar Under construction Solar 6.3 mi 4.5

Sources EIA-860M

Sources

  • EIA-860MOpen license · retrieved Nov 4, 2026

Attribution