Castle Rock — Plant Summary
- EIA Plant ID
- 4079
- Capacity
- 15 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Adams, WI
- Operating Since
- 1950
- Generators
- 5
- Operator
- Wisconsin River Power Company
- Parent Company
- —
- Annual Generation
- 91,948 MWh
- Capacity Factor
- 69.9%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Castle Rock
OperatingHydro
Ranked #11 of 61 Hydro plants in WI#544 of 1454 nationally
15 MW Hydro operating in Adams, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
15 MW
Nameplate Capacity
5
Generators
units
Conventional Hydroelectric
Technology
1950
Operating Since
Location
Coordinates
43.8655, -89.9550
County
Adams, WI
Nearby Plants
- New Lisbon SolarSolar2.5 MW · 14.6 km
- Lemonweir (Oak 1)Solar3 MW · 14.9 km
- Whistling Winds DPC SolarSolar1.5 MW · 15.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin River Power Company | — | — |
| Owner(s) | Wisconsin Power & Light Co, Wisconsin Public Service Corp | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Castle Rock is a hydroelectric power plant located in Adams County, Wisconsin. The plant is owned and operated by Wisconsin River Power Company. Commissioned in 1950, it has a total capacity of 15 MW distributed across five generators. The primary fuel source is water (WAT), utilized through conventional hydroelectric technology. Castle Rock operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the MRO NERC region.
In the most recent year with available data, Castle Rock generated 91,948 MWh of electricity, achieving a capacity factor of 69.9%. The plant's installed cost was $1,578.24 per kW. Castle Rock is ranked as the 15th largest power plant out of 65 in Wisconsin, and 557th out of 1464 nationally. Recent news coverage related to the plant includes hazards and regulatory matters.
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
7.0K MWh
Latest Month
91.9K MWh
Annual Generation
69.9%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$1,885/kW
Installed Cost
$16.6/MWh
Operating Cost
Wisconsin River Power Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Castle Rock · 69 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
WPS.WPSM(50%)/ALTE.ALTE(50%)
Pricing Hub
MICHIGAN.HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
Hazards·other
Wisconsin River Power Company warns of safety risks during dam drawdowns
The Wisconsin River Power Company, or WRPCO, is urging caution around its Petenwell Dam over the next few months as the utility performs its...
Wisconsin River Power Company (operator)
WSAW·2 months ago
General
Charlotte R Stelling Obituary May 19, 2024
Our dear mother, Charlotte Ruth (Eickmann) Stelling passed away on May 19, 2024. She was a wonderful mother, mother-in-law, and grandmother...
Hemmingsen Funeral Home·1 years ago
General
Mapping the Coal Ash Contamination
292 plants reported groundwater monitoring data. Based on that data, 91% of these plants are contaminating groundwater with toxic substances at levels...
Earthjustice·3 years ago
General
On The Road With The WPA
Pick any stretch of road and you can find along it a history of the nation. I chose Illinois Route 2 along the Rock River, following a tour from a 1939...
Contingent Magazine·4 years ago
Last updated 2026-03-26
View all 10 articles