INTERMOUNTAIN POWER PROJECT

Operating

Coal power plant

Capacity: 1,640 MW
Primary fuel: Coal
County: Millard County
Operator: LOS ANGELES DEPARTMENT OF WATER & POWER
Status: Operating
Commissioned: 1986
EIA plant ID: 6481
Generators: 2
Technology: Conventional Steam Coal
Net generation (2024): 5,708 GWh
Capacity factor (2024, EIA nameplate): 40%
Data vintage: EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates: 39.5093, -112.5799

INTERMOUNTAIN POWER PROJECT, a 1,640 MW Coal power plant in Millard County, Utah. Operated by LOS ANGELES DEPARTMENT OF WATER & POWER, commissioned 1986.

How INTERMOUNTAIN POWER PROJECT compares

With 1,640 MW of capacity, INTERMOUNTAIN POWER PROJECT is the largest of the 61 operating power plants Bywatts maps in Utah and the largest of the 5 operating Coal plants in the state. It accounts for about 35% of Utah's operating Coal capacity and 22% of all operating capacity in the state. Nationally it is the 60th-largest of the 324 operating Coal plants in the database. Commissioned in 1986, it is older than 50% of the 61 operating Utah plants with a recorded commissioning year.

EIA-860 lists 2 generators at the site with 1,640 MW of nameplate capacity, all conventional steam coal technology. Net generation was 5,708 GWh in 2024 (a 40% capacity factor), up 4% from 2022. Its generators came online between 1986 and 1987.

Grid neighborhood

The nearest named substation is INTERMOUNTAIN (500 kV), about 0.6 miles away; the closest transmission line found within 10 miles is a 345 kV line owned by INTERMOUNTAIN POWER AGENCY, under 0.1 miles away.

Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology

Weather peril exposure

INTERMOUNTAIN POWER PROJECT is a 1,640 MW coal power plant in Millard County, UT, operated by LOS ANGELES DEPARTMENT OF WATER & POWER, commissioned in 1986. Millard County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 4th national percentile. Wildfire is the leading peril, rated Relatively Moderate by FEMA at the 94th percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

1.2 of 5Modeled catastrophe exposure

LowExposure band

WildfireLeading peril

Very LowFEMA county risk rating

Millard County hazard ratings

Peril	FEMA rating	National percentile	Peril score	Events per year
Wildfire	Relatively Moderate	94th	4.7 of 5	<0.01
Earthquake	Relatively Low	91st	4.6 of 5	0.01
Winter weather	Relatively High	79th	4.2 of 5	16.5
Heat wave	Very Low	47th	2.9 of 5	1.7
Lightning	Relatively Low	34th	2.3 of 5	33.8
Ice storm	Very Low	20th	1.8 of 5	0.01
Strong wind	Very Low	15th	1.6 of 5	0.25
Tornado	Very Low	9th	1.4 of 5	0.09
Hail	Very Low	6th	1.2 of 5	0.03
Riverine flooding	Very Low	4th	1.2 of 5	0.32

Perils not assessed in Millard County

These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.

Peril	Why it is not scored
Hurricane	FEMA rating is "Not Applicable" for this county
Coastal flooding	FEMA rating is "Not Applicable" for this county

Model hail, wind and flood exposure for Millard County in the weather risk calculator

Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.

Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.