USUS Grid ExplorerInfrastructure intelligence
Preliminary 2025 facility recordOperating

Yellowstone, WY · EIA plant 2196

Old Faithful

Old Faithful is a oil & gas power facility in Yellowstone, WY, with 2 MW of operating capacity.

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Operating capacity2 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityNorthWestern Energy (MT wind/thermal)EIA-reported operator
Balancing authorityNWMTNorthWestern Energy (NWMT)

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Oil & gas2 MW
ProposedNo proposed capacity reported
Reported technologiesPetroleum Liquids

Nearby in WY

Related facilities

WY · 13.1 miLake (WY)3 MW →WY · 81.6 miShoshone (WY)3 MW →WY · 82.1 miBuffalo Bill18 MW →WY · 84.1 miSpirit Mountain5 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