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United States › Power plants › Oil-fired power plants › Wyoming

OIL-FIRED POWER PLANTS

Old Faithful

Old Faithful is a 2.0 MW operating oil-fired power plant in Teton County, Wyoming, operated by NorthWestern Energy (MT wind/thermal).

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingDec 1979 (current stage)
  5. Closed (not yet reached)

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
1Petroleum Liquids1.0 MW Standby / back-upDec 1979
2Petroleum Liquids1.0 MW Standby / back-upDec 1979

Plant details

Operator
NorthWestern Energy (MT wind/thermal)
Location
Teton County, Wyoming
Balancing authority
NWMT
Sector
Electric Utility
Capacity
Operating: 2.0 MW
First unit online
Dec 1979
EIA plant ID
2196

Location

44.4533, -110.8347

Nearby power plants

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem