How many other power plants are in Montana?

3, with 62 MW of nameplate capacity between them, spread over 2 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Montana other power plants?

Yes — the map above. Each dot is one power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest power plant in Montana?

OREG 1 Inc, at 30 MW. The table is sorted largest first, so the rest follow it.

Is there a power plant near me in Montana?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs Montana's other power plants?

Most of them sit inside SPP, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.

How current is this, and what is left out?

EIA-860M for 2026-07. Other gases, flywheels and units EIA files under "All Other". Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Other Power Plants in Montana

Every operating power plant in Montana on EIA-860M for 2026-07: 3 plants, 9 generating units and 62 MW of nameplate capacity across 2 counties, most of it inside SPP.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 3; 9 generating units
Nameplate capacity: 62 MW
Counties: 2
Grid operator: SPP; covers most of these plants

Map of other power plants in Montana

Every one of the 3 plants is drawn at the coordinate EIA files for it.

Loading map…

Other · 3

List of other power plants in Montana

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

other power plants in Montana

OREG 1 IncAll Other	Ormat Nevada Inc	Roosevelt	30	4	2006	Operating
OREG 2 IncAll Other	Ormat Nevada Inc	Roosevelt	30	4	2008	Operating
Phillips 66 Billings RefineryOther Gases	Phillips 66 Billings Refinery	Yellowstone	1.6	1	2007	Out of service and NOT expected to return to service in next calendar year

Largest other power plants in Montana

1OREG 1 IncRoosevelt County, Montana30 MW
2OREG 2 IncRoosevelt County, Montana30 MW
3Phillips 66 Billings RefineryYellowstone County, Montana1.6 MW

Other power plants by county in Montana

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Roosevelt	2	60
Yellowstone	1	1.6

Other Power Plants in Montana: FAQ

How many other power plants are in Montana?: 3, with 62 MW of nameplate capacity between them, spread over 2 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Montana other power plants?: Yes — the map above. Each dot is one power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest power plant in Montana?: OREG 1 Inc, at 30 MW. The table is sorted largest first, so the rest follow it.
Is there a power plant near me in Montana?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Montana's other power plants?: Most of them sit inside SPP, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
How current is this, and what is left out?: EIA-860M for 2026-07. Other gases, flywheels and units EIA files under "All Other". Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.