Thornapple
Dam Rd., Bruce, WI 54848Plant Summary Information
Thornapple is ranked #51 out of 66 hydroelectric power plants in Wisconsin in terms of total annual net electricity generation.
Thornapple is comprised of 2 generators and generated 1.2 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Thornapple |
|---|---|
| Utility Name | Northern States Power Co - Minnesota |
| Location | Rusk County, WI |
| Initial Operation Date | January 1927 |
| Last Update | Dec 2025 |
| Annual Generation | 6.6 GWh |
| Annual Consumption | 24.3 k MMBtu |
| Ranked #7,565 out of 13,081 Power Plants Nationwide | |
| Ranked #1,013 out of 1,311 Water Power Plants Nationwide | |
| Ranked #157 out of 260 Wisconsin Power Plants | |
| Ranked #51 out of 66 Wisconsin Water Power Plants | |
| Fuel Types | Water |
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Monthly Net Generation for Thornapple
Monthly Plant Fuel Consumption for Thornapple
Thornapple Details
| Summary Information | |
|---|---|
| Plant Name | Thornapple (3988) |
| Plant Address | Dam Rd., Bruce, WI 54848 |
| Utility | Northern States Power Co - Minnesota (13781) |
| Latitude, Longitude | 45.41114, -91.21828 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | January 1927 |
| Annual Generation | 6.6 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 | Flambeau River |
| Ash Impoundment | No |
| Transmission / Distribution Owner | Northern States Power Co (13780) WI |
| Grid Voltage | 23.90 kV |
| Energy Storage | No |
Generator 1 Details Operating January 1927
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 0.7 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 0.4 MW |
| Winter Capacity | 0.4 MW |
| Minimum Load | 0.2 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | January 1927 |
| 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 January 1929
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 0.7 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 0.4 MW |
| Winter Capacity | 0.4 MW |
| Minimum Load | 0.2 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | January 1929 |
| 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 |
Thornapple Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
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Power plants with a similar annual net generation from Water.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #1003 | Glenwood Hydro | Medina, NY | 6.7 GWh |
| #1004 | Pembroke Hydro | Suncook, NH | 6.7 GWh |
| #1005 | Strontia Springs Hydro Plant | Littleton, CO | 6.7 GWh |
| #1006 | Barber Dam | Boise, ID | 6.7 GWh |
| #1007 | Foothills Hydro Plant | Littleton, CO | 6.7 GWh |
| #1008 | Lundy | Lee Vining, CA | 6.7 GWh |
| #1009 | Hydro Plant | Three Rivers, MI | 6.7 GWh |
| #1010 | International Paper Woronoco Mill | Woronoco, MA | 6.6 GWh |
| #1011 | La Grange | La Grange, CA | 6.6 GWh |
| #1012 | Hat Rapids | Rhinelander, WI | 6.6 GWh |
| #1014 | Bear Creek (CA) | Shingletown, CA | 6.5 GWh |
| #1015 | Niagara | Vinton, VA | 6.5 GWh |
| #1016 | Pillager | Pillager, MN | 6.5 GWh |
| #1017 | Dam No. 5 Hydro Station | Hedgesville, WV | 6.5 GWh |
| #1018 | Scanlon | Scanlon, MN | 6.5 GWh |
| #1019 | Rockton | Rockton, IL | 6.5 GWh |
| #1020 | North Gorham | Gorham, ME | 6.5 GWh |
| #1021 | Mother Ann Lee | Harrodsburg, KY | 6.4 GWh |
| #1022 | Great Falls Hydro Project | Paterson, NJ | 6.3 GWh |
| #1023 | Pleasant Valley Hydro | Bishop, CA | 6.3 GWh |
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