GRIFFITH ENERGY LLC
OperatingNatural Gas power plant
- Capacity
- 654 MW
- Primary fuel
- Natural Gas
- County
- Mohave County
- Operator
- STAR WEST GEN GRIFFITH ENERGY LLC
- Status
- Operating
- Commissioned
- 2002
- EIA plant ID
- 55124
- Generators
- 3
- Technology
- Natural Gas Fired Combined Cycle
- Net generation (2024)
- 3,779 GWh
- Capacity factor (2024, EIA nameplate)
- 66%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 35.0540, -114.1333
GRIFFITH ENERGY LLC, a 654 MW Natural Gas power plant in Mohave County, Arizona. Operated by STAR WEST GEN GRIFFITH ENERGY LLC, commissioned 2002.
How GRIFFITH ENERGY LLC compares
With 654 MW of capacity, GRIFFITH ENERGY LLC ranks 20th among the 71 operating power plants Bywatts maps in Arizona and 15th of the 23 operating Natural Gas plants in the state. It accounts for about 4.0% of Arizona's operating Natural Gas capacity and 2.3% of all operating capacity in the state. Nationally it is the 225th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2002, it is older than 53% of the 69 operating Arizona plants with a recorded commissioning year. It shares Mohave County with 5 other operating plants, including HOOVER DAM (AZ) and SOUTH POINT ENERGY CENTER.
EIA-860 lists 3 generators at the site with 655 MW of nameplate capacity, all natural gas fired combined cycle technology. Net generation was 3,779 GWh in 2024 (a 66% capacity factor), up 27% from 2022.
Grid neighborhood
The nearest named substation is GRIFFITH (230 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line, about 0.1 miles away. Another 2 operating power plants totaling 132 MW sit within 25 miles; the largest is BLACK MOUNTAIN GENERATING STATION (121 MW).
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
GRIFFITH ENERGY LLC is a 654 MW natural gas power plant in Mohave County, AZ, operated by STAR WEST GEN GRIFFITH ENERGY LLC, commissioned in 2002. Mohave County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.5 of 5 at the 13th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 95th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Mohave County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 95th | 4.8 of 5 | <0.01 |
| Riverine flooding | Relatively High | 86th | 4.4 of 5 | 10.4 |
| Heat wave | Relatively High | 67th | 3.7 of 5 | 10.3 |
| Earthquake | Relatively Low | 61st | 3.5 of 5 | 0.01 |
| Winter weather | Relatively High | 28th | 2.1 of 5 | 5.4 |
| Strong wind | Relatively Moderate | 19th | 1.8 of 5 | 0.26 |
| Hail | Relatively Low | 18th | 1.7 of 5 | 0.12 |
| Lightning | Very High | 17th | 1.7 of 5 | 36.9 |
| Tornado | Very Low | 1st | 1.0 of 5 | 0.27 |
| Ice storm | Relatively Moderate | 1st | 1.0 of 5 | 0.01 |
Perils not assessed in Mohave 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 "No Rating" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Mohave 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.