Dave Johnston
Dave Johnston is a coal plant in Converse County, Wyoming, operated by PacifiCorp. It ranks third by nameplate capacity among Wyoming’s 71 power plants. The operator has reported planned retirement dates for 230 MW of it, in 2027. Its oldest working unit dates from 1959, the second-earliest start among Wyoming’s 11 coal plants.
Nameplate capacity, 2025
817 MW
745 MW net summer capacity
4 operable units
- Coal steam817 MW100%
Unit by unit, 1959 to 2025
operating in 2025reported planned retirementbar height follows unit size
Unit 1 Coal steam, 114 MW, 1959
Unit 2 Coal steam, 114 MW, 1961
Unit 3 Coal steam, 230 MW, 1964
Unit 4 Coal steam, 360 MW, 1972
Among Wyoming’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Jim Bridger2,326 MW
- 2Laramie River Station1,863 MW
- 3Dave Johnstonthis plant
- 4Naughton707 MW
- 5Rock Creek Wind590 MW
Other rankings
- All US power plants
- 393rd of 14,286
- US coal plants
- 89th of 195
- Coal plants in Wyoming
- 2nd of 11
- Plants in the PacifiCorp East balancing area
- 5th of 172
- Plants run by PacifiCorp
- 5th of 59
- Biggest single unit, among Wyoming’s plants
- 8th of 71
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Coal steam | 114 MW | 93 MW | 1959 | Operating |
| 2 | Coal steam | 114 MW | 102 MW | 1961 | Operating |
| 3 | Coal steam | 230 MW | 220 MW | 1964 | Operating, retirement planned for 2027 |
| 4 | Coal steam | 360 MW | 330 MW | 1972 | Operating |
Grid and site
- Balancing area
- PacifiCorp East
- Reliability region
- Western Electricity Coordinating Council
- Highest grid connection voltage
- 230 kV
- Water source
- North Platte River
- Nearest town on record
- Glen Rock
- Operator type
- Utility
- Coordinates
- 42.838°N, 105.777°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Top of the World Windpower Project | Wind | 200 MW | 6.1 mi north |
| Pioneer Wind Park, LLC | Wind | 80 MW | 8.8 mi southwest |
| Glenrock | Wind | 166 MW | 12.8 mi north |
| Rolling Hills | Wind | 116 MW | 15.7 mi north |
| Campbell Hill Windpower | Wind | 99 MW | 16.6 mi northwest |
| Cedar Springs Wind IV | Wind | 390 MW | 18.5 mi north |
| Cedar Springs III | Wind | 133 MW | 19.2 mi northeast |
| Cedar Springs I | Wind | 200 MW | 19.9 mi northeast |