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Prices here are state averages across all utilities and rate plans, from the U.S. Energy Information Administration — not the rate on any one bill. Generation-mix figures are reported annually, not real time.

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NorthWestern Energy (MT Hydro)

Electric power plant operator — U.S. Energy Information Administration (Forms EIA-860/860M).

Power plants
10
Total nameplate capacity
444.6 MW
States
1
Generators
34

Capacity by technology

Conventional Hydroelectric · 10 plants444.6 MW
PlantStateTechnologyCapacity
Thompson FallsMTConventional Hydroelectric91.1 MW
MoronyMTConventional Hydroelectric63 MW
CochraneMTConventional Hydroelectric59.4 MW
Rainbow (MT)MTConventional Hydroelectric59 MW
RyanMTConventional Hydroelectric55.2 MW
HolterMTConventional Hydroelectric45 MW
Black EagleMTConventional Hydroelectric26.7 MW
HauserMTConventional Hydroelectric16.8 MW
Madison DamMTConventional Hydroelectric16.4 MW
MysticMTConventional Hydroelectric12 MW

Source: U.S. Energy Information Administration, Forms EIA-860/EIA-860M — currently operating generators, aggregated to plant then to operator.

NorthWestern Energy (MT Hydro) — Power Plants & Capacity | EnergyAtlasUSA