Prairie Du Sac — Plant Summary
- EIA Plant ID
- 4056
- Capacity
- 33.4 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Sauk, WI
- Operating Since
- 1915
- Generators
- 8
- Operator
- Wisconsin Power & Light Co
- Parent Company
- —
- Annual Generation
- 143,782 MWh
- Capacity Factor
- 49.1%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Prairie Du Sac
OperatingHydro
Ranked #5 of 61 Hydro plants in WI#383 of 1454 nationally
33.4 MW Hydro operating in Sauk, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
33.4 MW
Nameplate Capacity
8
Generators
units
Conventional Hydroelectric
Technology
1915
Operating Since
Location
Coordinates
43.3100, -89.7276
County
Sauk, WI
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Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin Power & Light Co | — | — |
| Owner(s) | Wisconsin Power & Light Co | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Prairie Du Sac hydroelectric plant is located in Sauk County, Wisconsin. It is owned and operated by Wisconsin Power & Light Co. The plant has a total capacity of 33.4 MW consisting of 8 generators utilizing conventional hydroelectric technology and water as its primary fuel source. Prairie Du Sac began operating in 1915. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority.
In the most recent year with available data, Prairie Du Sac generated 143,782 MWh, achieving a capacity factor of 49.1%. The plant is ranked 6th out of 65 hydroelectric facilities in Wisconsin and 388th out of 1464 nationally. Financial data indicates an installed cost of $3,572.14 per kW. The plant is located within the MRO NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
11.0K MWh
Latest Month
143.8K MWh
Annual Generation
49.1%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$3,927/kW
Installed Cost
$7.0/MWh
Operating Cost
Wisconsin Power and Light Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
ALTE.PDSG1S1
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry
Public Power Communities: Prairie du Sac, Wisconsin
The public power utility that serves Prairie du Sac, Wisconsin, was established in 1914, the same year the Prairie du Sac Dam hydroelectric...
Prairie du Sac Dam (operator)
American Public Power Association·4 weeks ago
Hazards·other
50 years, $229 million, and Army still hasn't removed toxic waste from ammunition plant
Toxic chemicals produced at the plant leached into soil and then groundwater. Some contaminants have traveled via groundwater to people's...
Army (other)
Milwaukee Journal Sentinel·5 months ago
Hazards·other
View historical photos of the former Badger Ammunition plant near Baraboo, Wis.
The former Badger Ammunition plant just south of Devil's Lake State Park brought jobs during three wars but left a legacy of water and soil...
Milwaukee Journal Sentinel·5 months ago
Hazards·flooding
10 wild Wisconsin weather events caught on tape
Blizzards, tornadoes, and floods are no strangers to us. Check out this footage of some extreme weather events Wisconsin has experienced...
Up North News·7 months ago
Last updated 2026-03-14
View all 10 articles