93rd largest plant in Wisconsin · 5128th nationally
Castle Rock is a hydroelectric power plant in Wisconsin with a nameplate capacity of 15.0 MW. It generates roughly 75.6k MWh per year — enough to power about 7,203 average U.S. homes.
Its capacity factor of 58% puts it in the middle range — running steadily but not full-time.
| Plant Name | Castle Rock |
|---|---|
| Operator | Wisconsin River Power Company |
| City | Adams |
| County | Adams County |
| State | Wisconsin |
| ZIP | 53934 |
| Coordinates | 43.86560, -89.95140 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1951 |
| 2 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1950 |
| 3 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1950 |
| 4 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1950 |
| 5 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1950 |
| Owner | Location | Share |
|---|---|---|
| Wisconsin Power & Light Co | Madison, WI | 5000.0% |
| Wisconsin Public Service Corp | Milwaukee, WI | 5000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| NERC Region | MRO |
|---|---|
| Balancing Authority | Midcontinent Independent Transmission System Operator, Inc.. |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.