Prairie Du Sac
S9270A Dam Rd, Prairie du Sac, WI 53578Plant Summary Information
Prairie Du Sac is ranked #43 out of 260 power plants in Wisconsin in terms of total annual net electricity generation.
Prairie Du Sac is comprised of 8 generators and generated 22.5 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Prairie Du Sac |
|---|---|
| Utility Name | Wisconsin Power & Light Co |
| Location | Sauk County, WI |
| Initial Operation Date | October 1915 |
| Last Update | Dec 2025 |
| Annual Generation | 152.9 GWh |
| Annual Consumption | 558.9 k MMBtu |
| Ranked #2,937 out of 13,081 Power Plants Nationwide | |
| Ranked #247 out of 1,311 Water Power Plants Nationwide | |
| Ranked #43 out of 260 Wisconsin Power Plants | |
| Ranked #1 out of 66 Wisconsin Water Power Plants | |
| Fuel Types | Water |
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Monthly Net Generation for Prairie Du Sac
Monthly Plant Fuel Consumption for Prairie Du Sac
Prairie Du Sac Details
| Summary Information | |
|---|---|
| Plant Name | Prairie Du Sac (4056) |
| Plant Address | S9270A Dam Rd, Prairie du Sac, WI 53578 |
| Utility | Wisconsin Power & Light Co (20856) |
| Latitude, Longitude | 43.30993, -89.72778 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | October 1915 |
| Annual Generation | 152.9 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 | No |
| Transmission / Distribution Owner | American Transmission Co (659) WI |
| Grid Voltage | 69.00 kV |
| Energy Storage | No |
Generator 1 Details Operating October 1915
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | ALTE.PDSG1S1 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | ALTE.PDSG1S1 |
| Nameplate Capacity | 3.5 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 29 MW |
| Winter Capacity | 29 MW |
| Minimum Load | 0.7 MW |
|---|---|
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | October 1915 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
Generator 2 Details Operating December 1915
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4.3 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 0.9 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | December 1915 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 3 Details Operating March 1920
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4.8 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 1 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | March 1920 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 4 Details Operating February 1922
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4.8 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 1 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | February 1922 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 5 Details Operating March 1938
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 0.7 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | March 1938 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 6 Details Operating March 1938
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 0.7 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | March 1938 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 8 Details Operating October 1940
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 0.7 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | October 1940 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Generator 7 Details Operating November 1940
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Unit Code | B061 |
| Ownership | Single Owner |
| Nameplate Capacity | 4 MW |
| Nameplate Power Factor | 0.8 |
| Minimum Load | 0.7 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | November 1940 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
Prairie Du Sac Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
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| Kilbourn | Wisconsin Dells, WI | 49.2 GWh | 22 mi |
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| Sycamore (WI) | Madison, WI | 28.0 MWh | 24.9 mi |
| Tyto Solar | Fitchburg, WI | 11.3 GWh | 28.4 mi |
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