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33.4 MW Hydro operating in Sauk, WI — Midcontinent Independent Transmission System Operator, Inc..
33.4 MW
Nameplate Capacity
8
Generators
units
Conventional Hydroelectric
Technology
1915
Operating Since
Coordinates
43.3100, -89.7276
County
Sauk, WI
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin Power & Light Co | — | — |
| Owner(s) | Wisconsin Power & Light Co | — | — |
| Status | Operating | — | — |
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
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
11.0K MWh
Latest Month
143.8K MWh
Annual Generation
49.1%
Capacity Factor
Run-of-river hydro · Wisconsin Power and Light Company · Data from 2015–2024
$3,927/kW
Installed Cost
$7.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
MISO
LMP Node
ALTE.PDSG1S1
Pricing Hub
MICHIGAN.HUB
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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ask pi about Prairie Du SacMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility