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23.2 MW Hydro operating in Polk, WI
23.2 MW
Nameplate Capacity
8
Generators
units
Conventional Hydroelectric
Technology
1910
Operating Since
Coordinates
45.4119, -92.6471
County
Polk, WI
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Northern States Power Co - Minnesota | — | — |
| Owner(s) | Northern States Power Co - Minnesota | — | — |
| Status | Operating | — | — |
The St Croix Falls hydroelectric plant is located in Polk County, Wisconsin. The plant has a total capacity of 23.2 MW across 8 generators, using conventional hydroelectric technology and water as its primary fuel source. It began operating in 1910 and is owned and operated by Northern States Power Co - Minnesota. The plant operates within the Midcontinent Independent Transmission System Operator, Inc. balancing authority and the MRO NERC region.
In the most recent year of data, St Croix Falls generated 104,927 MWh, achieving a capacity factor of 51.5%. The plant's installed cost was $791.82 per kW. St Croix Falls is ranked as the 8th largest power plant out of 65 in Wisconsin, and 458th out of 1464 nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
161.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
7.4K MWh
Latest Month
104.9K MWh
Annual Generation
51.5%
Capacity Factor
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Northern States Power Company (Wisconsin) · Data from 2015–2021
$792/kW
Installed Cost
$7.9/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Market Position
ISO/RTO Market
MISO
LMP Node
NSP ST_CROIX STCR_HYD_UNIT
Pricing Hub
MICHIGAN.HUB
Alt. Hub / Zone
MINN.HUB
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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