16.4 MW Hydro operating in Madison, MT — NorthWestern Energy (NWMT)
16.4 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
2021
Operating Since
Coordinates
45.4879, -111.6338
County
Madison, MT
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | NorthWestern Energy (MT Hydro) | — | — |
| Owner(s) | NorthWestern Energy (MT Hydro) | — | — |
| Status | Operating | — | — |
Madison Dam is a 16.4 MW hydroelectric power plant located in Madison County, Montana. The plant began operating in 2021 and utilizes conventional hydroelectric technology. It is owned and operated by NorthWestern Energy (MT Hydro) and consists of 4 generators using water (WAT) as its primary fuel source. Madison Dam operates within the NorthWestern Energy (NWMT) balancing authority in the Western Electricity Coordinating Council (WECC) NERC region.
In its latest year of operation, Madison Dam generated 76,209 MWh of electricity, achieving a capacity factor of 52.9%. The plant is ranked as the 16th largest out of 23 hydroelectric facilities in Montana, and 528th nationally out of 1464 similar plants. Financial data indicates an installed cost of $3,324.1 per kW. The plant's operations and impact have been covered in approximately 10 news articles, with a focus on industry trends, grid operations, and regulatory matters.
Generated from EIA, GEM, and public data sources
NERC Region
WECC
Balancing Authority
NorthWestern Energy (NWMT)
Grid Voltage
100 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
6.9K MWh
Latest Month
76.2K MWh
Annual Generation
52.9%
Capacity Factor
$2,174/kW
Installed Cost
NorthWestern Corporation
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
Last updated 2026-03-26
View all 10 articles