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68 MW Pet. Coke operating in Yellowstone, MT — NorthWestern Energy (NWMT)
68 MW
Nameplate Capacity
1
Generators
unit
Petroleum Coke
Technology
1995
Operating Since
Coordinates
45.8109, -108.4285
County
Yellowstone, MT
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Yellowstone Energy LP | Yellowstone Energy | — |
| Owner(s) | Yellowstone Energy LP | Par Pacific Holdings | — |
| Status | Operating | — | — |
Yellowstone Energy LP is a 68 MW power plant located in Yellowstone County, Montana. The plant, which began operating in 1995, utilizes petroleum coke (PC) as its primary fuel source. It consists of a single generator. Yellowstone Energy LP is both the owner and operator, while Par Pacific Holdings is the parent company. The plant is the largest of its kind in Montana and ranks third nationally among facilities using petroleum coke.
In the most recent year with available data, Yellowstone Energy LP generated 458,357 MWh of electricity, achieving a capacity factor of 77.0%. The plant operates within the NorthWestern Energy (NWMT) balancing authority and is part of the Western Electricity Coordinating Council (WECC) NERC region.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
35.9K MWh
Latest Month
458.4K MWh
Annual Generation
77.0%
Capacity Factor
CO₂ Intensity
1840 lb/MWh
NOx
0.840 lb/MWh
SO₂
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Yellowstone Energy LPNorthWestern Energy (NWMT) (NWMT)
Grid Voltage
50.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP CHP
17 lb/MWh
CH₄
0.053 lb/MWh
N₂O
0.011 lb/MWh
Capacity Factor
82.4%
Annual Net Gen
491 GWh
CO₂eq
1845 lb/MWh
Subregion
WECC Northwest