Search
Search plants, projects, owners, and states
Search plants, projects, owners, and states
15 MW Hydro operating in Adams, WI — Midcontinent Independent Transmission System Operator, Inc..
15 MW
Nameplate Capacity
5
Generators
units
Conventional Hydroelectric
Technology
1950
Operating Since
Coordinates
43.8655, -89.9550
County
Adams, WI
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin River Power Company | — | — |
| Owner(s) | Wisconsin Power & Light Co, Wisconsin Public Service Corp | — | — |
| Status | Operating | — | — |
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
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
7.0K MWh
Latest Month
91.9K MWh
Annual Generation
69.9%
Capacity Factor
Energy storage · Wisconsin River Power Company · Data from 2015–2024
$1,885/kW
Installed Cost
$16.6/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point 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
Alt. Hub / Zone
MINN.HUB
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about Castle RockMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility