Castle Rock
1976 Edgewood Drive, Adams, WI 53934Plant Summary Information
Castle Rock is ranked #5 out of 66 hydroelectric power plants in Wisconsin in terms of total annual net electricity generation.
Castle Rock is comprised of 5 generators and generated 13.6 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Castle Rock |
|---|---|
| Utility Name | Wisconsin River Power Company |
| Location | Adams County, WI |
| Initial Operation Date | August 1950 |
| Last Update | Dec 2025 |
| Annual Generation | 83.3 GWh |
| Annual Consumption | 308.4 k MMBtu |
| Ranked #3,702 out of 13,081 Power Plants Nationwide | |
| Ranked #366 out of 1,311 Water Power Plants Nationwide | |
| Ranked #64 out of 260 Wisconsin Power Plants | |
| Ranked #5 out of 66 Wisconsin Water Power Plants | |
| Fuel Types | Water |
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Monthly Net Generation for Castle Rock
Monthly Plant Fuel Consumption for Castle Rock
Castle Rock Details
| Summary Information | |
|---|---|
| Plant Name | Castle Rock (4079) |
| Plant Address | 1976 Edgewood Drive, Adams, WI 53934 |
| Utility | Wisconsin River Power Company (20863) |
| Latitude, Longitude | 43.8656, -89.9514 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | August 1950 |
| Annual Generation | 83.3 GWh |
| Fuel Types | Water |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Regulated |
| NERC Region | MRO |
| Balancing Authority | Midcontinent Independent Transmission System Operator, Inc.. (MISO) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | Wisconsin River |
| Ash Impoundment | |
| Transmission / Distribution Owner | American Transmission Co (659) WI |
| Grid Voltage | 69.00 kV |
| Energy Storage | No |
Generator 3 Details Operating October 1950
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Jointly Owned |
| RTO ISO LMP Node Designation | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| Nameplate Capacity | 3 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 3 MW |
| Winter Capacity | 3 MW |
| Minimum Load | 1.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | October 1950 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Generator 2 Details Operating November 1950
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Jointly Owned |
| RTO ISO LMP Node Designation | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| Nameplate Capacity | 3 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 3 MW |
| Winter Capacity | 3 MW |
| Minimum Load | 1.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | November 1950 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Generator 4 Details Operating August 1950
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Jointly Owned |
| RTO ISO LMP Node Designation | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| Nameplate Capacity | 3 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 3 MW |
| Winter Capacity | 3 MW |
| Minimum Load | 1.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | August 1950 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Generator 5 Details Operating August 1950
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Jointly Owned |
| RTO ISO LMP Node Designation | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| Nameplate Capacity | 3 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 3 MW |
| Winter Capacity | 3 MW |
| Minimum Load | 1.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | August 1950 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Generator 1 Details Operating August 1951
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Jointly Owned |
| RTO ISO LMP Node Designation | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | WPS.WPSM(50%)/ALTE.ALTE(50%) |
| Nameplate Capacity | 3 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 3 MW |
| Winter Capacity | 3 MW |
| Minimum Load | 1.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | August 1951 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Castle Rock Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| Wisconsin Power & Light Co | 4902 North Biltmore Lane, Madison, WI 53718 | Generator 1 | 50.00% |
| Wisconsin Public Service Corp | 231 W. Michigan Street, Milwaukee, WI 53203 | Generator 1 | 50.00% |
| Wisconsin Power & Light Co | 4902 North Biltmore Lane, Madison, WI 53718 | Generator 2 | 50.00% |
| Wisconsin Public Service Corp | 231 W. Michigan Street, Milwaukee, WI 53203 | Generator 2 | 50.00% |
| Wisconsin Power & Light Co | 4902 North Biltmore Lane, Madison, WI 53718 | Generator 3 | 50.00% |
| Wisconsin Public Service Corp | 231 W. Michigan Street, Milwaukee, WI 53203 | Generator 3 | 50.00% |
| Wisconsin Power & Light Co | 4902 North Biltmore Lane, Madison, WI 53718 | Generator 4 | 50.00% |
| Wisconsin Public Service Corp | 231 W. Michigan Street, Milwaukee, WI 53203 | Generator 4 | 50.00% |
| Wisconsin Power & Light Co | 4902 North Biltmore Lane, Madison, WI 53718 | Generator 5 | 50.00% |
| Wisconsin Public Service Corp | 231 W. Michigan Street, Milwaukee, WI 53203 | Generator 5 | 50.00% |
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Nearby Power Plants
Below are closest 20 power plants surrounding Castle Rock.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Adams PV Plant | Adams, WI | 15.4 GWh | 14.7 mi |
| Columbia (WI) | Pardeville, WI | 5.5 TWh | 37.3 mi |
| Elroy | Elroy, WI | 48.0 MWh | 18 mi |
| Elroy Solar | Mauston, WI | 1.3 GWh | 9.9 mi |
| Georgia-Pacific Corp - Nekoosa Mill | Nekoosa, WI | 159.9 GWh | 31.1 mi |
| Kilbourn | Wisconsin Dells, WI | 49.2 GWh | 18.6 mi |
| La Farge | La Farge, WI | 12.0 MWh | 39.8 mi |
| Lemonweir (Oak 1) | Mauston, WI | 5.6 GWh | 9.3 mi |
| New Lisbon | New Lisbon, WI | 55.0 MWh | 10.7 mi |
| New Lisbon Solar | New Lisbon, WI | 4.2 GWh | 9.3 mi |
| Petenwell | Necedah, WI | 97.2 GWh | 13.7 mi |
| Port Edwards Mill | Port Edwards, WI | 36.8 GWh | 32.8 mi |
| Portage Solar Plant | Portage, WI | 21.2 GWh | 39.6 mi |
| Sauk DPC Solar | Wonewoc, WI | 1.5 GWh | 26.3 mi |
| Stevens Point Mill | Stevens Point, WI | 14.5 GWh | 38.3 mi |
| Wautoma Solar | Wautoma, WI | 189.7 GWh | 35.1 mi |
| Webster Creek (Oak 2) | New Lisbon, WI | 2.8 GWh | 10.2 mi |
| Whistling Winds DPC Solar | New Lisbon, WI | 1.6 GWh | 9.5 mi |
| Wisconsin Rapids | Wisconsin Rapids, WI | 46.4 GWh | 37 mi |
| Wood County | Nekoosa, WI | 272.9 GWh | 28.8 mi |