USUS Grid ExplorerInfrastructure intelligence
Preliminary 2025 facility recordOperating

Ennis, MT · EIA plant 6422

Madison Dam

Madison Dam is a hydro power facility in Ennis, MT, with 16 MW of operating capacity.

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Operating capacity16 MW4 operating generators
Proposed capacity0 MW0 proposed generators
UtilityNorthWestern Energy (MT Hydro)EIA-reported operator
Balancing authorityNWMTNorthWestern Energy (NWMT)

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Hydro16 MW
ProposedNo proposed capacity reported
Reported technologiesConventional Hydroelectric

Nearby in MT

Related facilities

MT · 32.1 miGCC Trident Solar Project4 MW →MT · 45.1 miBroadwater Power Project10 MW →MT · 52.5 miBasin Creek Plant55 MW →MT · 56.7 miApex Solar80 MW →

Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source