Madison Dam
950 Ennis Lake Road, Ennis, MT 59729Plant Summary Information
Madison Dam is ranked #42 out of 71 power plants in Montana in terms of total annual net electricity generation.
Madison Dam is comprised of 4 generators and generated 18.7 GWh during the 3-month period between September 2024 to December 2024.
| Plant Name | Madison Dam |
|---|---|
| Utility Name | NorthWestern Energy (MT Hydro) |
| Location | Madison County, MT |
| Initial Operation Date | September 1906 |
| Last Update | Dec 2024 |
| Annual Generation | 76.2 GWh |
| Annual Consumption | 260.0 k MMBtu |
| Ranked #3,676 out of 12,539 Power Plants Nationwide | |
| Ranked #410 out of 1,332 Water Power Plants Nationwide | |
| Ranked #42 out of 71 Montana Power Plants | |
| Ranked #16 out of 23 Montana Water Power Plants | |
| Fuel Types | Water |
| Previous Operators |
PPL Montana LLC (2013 to 2013) NorthWestern Energy (2014 to 2020) NorthWestern Energy (MT hdro) (2021 to 2021) NorthWestern Energy (MT Hydro) (2022 to 2024) |
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Monthly Net Generation for Madison Dam
Madison Dam Details
| Summary Information | |
|---|---|
| Plant Name | Madison Dam (6422) |
| Plant Address | 950 Ennis Lake Road, Ennis, MT 59729 |
| Utility | NorthWestern Energy (MT Hydro) (13902) |
| Latitude, Longitude | 45.48787, -111.63381 |
| Generation Dates on File | Jan 2001 to Dec 2024 |
| Initial Operation Date | September 1906 |
| Annual Generation | 76.2 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 | Yes |
| FERC Exempt Wholesale Generator Docket Number | 99-185-000 |
| Regulatory Information | |
|---|---|
| Regulatory Status | Regulated |
| NERC Region | WECC |
| Balancing Authority | NorthWestern Energy (NWMT) (NWMT) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | Madison River |
| Ash Impoundment | No |
| Transmission / Distribution Owner | NorthWestern Energy LLC - (MT) (12825) MT |
| Grid Voltage | 100.00 kV |
| Energy Storage | No |
Generator MAD5 Details Operating December 2021
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 4.1 MW |
| Nameplate Power Factor | 0.9 |
| Summer Capacity | 4.1 MW |
| Winter Capacity | 4.1 MW |
| Minimum Load | 0.5 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | December 2021 |
| 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 MAD6 Details Operating December 2021
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 4.1 MW |
| Nameplate Power Factor | 0.9 |
| Summer Capacity | 4.1 MW |
| Winter Capacity | 4.1 MW |
| Minimum Load | 0.5 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | December 2021 |
| 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 MAD7 Details Operating January 2022
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 4.1 MW |
| Nameplate Power Factor | 0.9 |
| Summer Capacity | 4.1 MW |
| Winter Capacity | 4.1 MW |
| Minimum Load | 0.5 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | January 2022 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 1H |
Generator MAD8 Details Operating March 2022
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 4.1 MW |
| Nameplate Power Factor | 0.9 |
| Summer Capacity | 4.1 MW |
| Winter Capacity | 4.1 MW |
| Minimum Load | 0.5 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | March 2022 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 1H |
Madison Dam Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Water.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #400 | South Glens Falls Hydroelectric | South Glens Falls, NY | 80.4 GWh |
| #401 | Grandfather Falls | Irma, WI | 80.4 GWh |
| #402 | Williams Hydro | Solon, ME | 80.2 GWh |
| #403 | Upper Mechanicville | Town of Stillwater, NY | 78.7 GWh |
| #404 | Drop 4 | Holtville, CA | 78.2 GWh |
| #405 | West Enfield Hydro | West Enfield, ME | 77.5 GWh |
| #406 | Amoskeag | Manchester, NH | 76.9 GWh |
| #407 | Union Valley | Fresh Pond, CA | 76.5 GWh |
| #408 | Iron Gate | Hornbrook, CA | 76.4 GWh |
| #409 | Bennetts Bridge | Altmar, NY | 76.3 GWh |
| #411 | Swan Lake | Ketchikan, AK | 75.5 GWh |
| #412 | Blue Lake Hydro | Sitka, AK | 75.4 GWh |
| #413 | E J West | Lake Luzerne, NY | 75.4 GWh |
| #414 | Stevens Creek | Martinez, GA | 74.5 GWh |
| #415 | Arrowrock Hydroelectric Project | Boise, ID | 73.0 GWh |
| #416 | London | Handley, WV | 72.9 GWh |
| #417 | Tallulah Falls | Tallulah Falls, GA | 72.0 GWh |
| #418 | Navajo Dam | Farmington, NM | 72.0 GWh |
| #419 | Hardy | Newaygo, MI | 71.6 GWh |
| #420 | Shoshone Falls | Twin Falls, ID | 71.3 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Madison Dam.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Apex Solar | Dillon, MT | 166.2 GWh | 56.7 mi |
| Ashton | Ashton, ID | 32.6 GWh | 97.6 mi |
| Basin Creek Plant | Butte, MT | 185.4 GWh | 52.5 mi |
| Big Timber Wind Farm | Big Timber, MT | 66.0 GWh | 99.1 mi |
| Broadwater Power Project | Toston, MT | 47.4 GWh | 45.1 mi |
| Canyon Ferry | Helena, MT | 275.1 GWh | 80.4 mi |
| Chester Diversion Hydroelectric Project | Chester, ID | 8.0 GWh | 101.6 mi |
| Dave Gates Generating Station | Anaconda, MT | 551.8 GWh | 73.5 mi |
| Falls River Hydro | Ashton, ID | 47.4 GWh | 99.6 mi |
| Flint Creek Hydroelectric LLC | Philipsburg, MT | 11.0 GWh | 94.9 mi |
| GCC Trident Solar Project | Three Forks, MT | 3.7 GWh | 32.1 mi |
| Gordon Butte Wind LLC | Martinsdale, MT | 72.8 GWh | 89.2 mi |
| Great Divide Solar, LLC | Canyon Creek, MT | 5.9 GWh | 95.7 mi |
| Green Meadow Solar, LLC | Helena, MT | 5.6 GWh | 85.9 mi |
| Hauser | Helena, MT | 134.4 GWh | 89.1 mi |
| Island Park | Island Park, ID | 17.9 GWh | 74.8 mi |
| Lake (WY) | Yellowstone, WY | 515.0 MWh | 90.4 mi |
| Mystic | Fishtail, MT | 53.7 GWh | 92.6 mi |
| Old Faithful | Yellowstone, WY | 273.0 MWh | 81.5 mi |
| Two Dot Wind Farm | Two Dot, MT | 34.8 GWh | 99.6 mi |