MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/2186
EIA plant 2186

Wolf Creek · Cascade · MT

Holter

Operated by NorthWestern Energy (MT Hydro)

Annual generation265,780 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextNorthWestern Energy (NWMT)Balancing authority or NERC region

Published location

Where is Holter?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

46.991500, -112.004700

Open the interactive map ↗

Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

2024 monthly net generation

MonthNet generation
127,972 MWh
222,852 MWh
321,844 MWh
419,992 MWh
520,921 MWh
627,418 MWh
722,332 MWh
823,251 MWh
920,745 MWh
1019,827 MWh
1119,207 MWh
1219,419 MWh

Operating generators

IDTechnologyFuelMWStatus
HOL1Conventional HydroelectricWAT15OP
HOL2Conventional HydroelectricWAT15OA
HOL3Conventional HydroelectricWAT15OP
HOL4Conventional HydroelectricWAT9.6OP

Continue exploring

Similar-capacity plants in the same state

MT

Basin Creek Plant

MT

Canyon Ferry

MT

Ryan

MT

Rainbow (MT)

MT

Cochrane

MT

Morony

Identity, technology and limitations
EIA plant ID
2186
Sector
Electric Utility
Water source
Missouri River
Data edition
2024-final