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2 MW Distillate Oil standby in Teton, WY — NorthWestern Energy (NWMT)
2 MW
Nameplate Capacity
2
Generators
units
Petroleum Liquids
Technology
1979
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | NorthWestern Energy (MT wind/thermal) | — | — |
| Owner(s) | NorthWestern Energy (MT wind/thermal) | — | — |
| Status | Standby | — | — |
Old Faithful is a small petroleum-fueled power plant located in Teton County, Wyoming. The plant has a total capacity of 2 MW, distributed across two generators utilizing Petroleum Liquids technology. It began operating in 1979 and is owned and operated by NorthWestern Energy (MT wind/thermal). The plant operates within the NorthWestern Energy (NWMT) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In its latest year of operation, Old Faithful generated 273 MWh of electricity, resulting in a capacity factor of 1.6%. According to available data, the plant's installed cost was $328.84 per kW, based on information reported to the Federal Energy Regulatory Commission (FERC). Old Faithful is ranked as the 2nd largest petroleum plant in Wyoming, and 754th nationally out of 886 similar plants.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
21 MWh
Latest Month
273 MWh
Annual Generation
1.6%
Capacity Factor
CO₂ Intensity
1824 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
36 lb/MWh
SO₂
Internal combustion · NorthWestern Corporation · Data from 2015–2023
$329/kW
Installed Cost
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
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ask pi about Old FaithfulNorthWestern Energy (NWMT) (NWMT)
Grid Voltage
50.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
3 lb/MWh
CH₄
0.074 lb/MWh
N₂O
0.015 lb/MWh
Capacity Factor
1.4%
Annual Net Gen
0 GWh
CO₂eq
1830 lb/MWh
Subregion
WECC Northwest