Dave Johnston — Plant Summary
- EIA Plant ID
- 4158
- Capacity
- 816.7 MW
- Primary Fuel
- Coal
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Converse, WY
- Operating Since
- 1959
- Generators
- 4
- Operator
- PacifiCorp
- Parent Company
- Berkshire Hathaway
- Annual Generation
- 4,273,471 MWh
- Capacity Factor
- 59.8%
- Balancing Authority
- PacifiCorp - East
- ISO/RTO
- —
- NERC Region
- WECC
Dave Johnston
OperatingSub. Coal
Ranked #2 of 10 Sub. Coal plants in WY#46 of 103 nationally
816.7 MW Sub. Coal operating in Converse, WY — PacifiCorp - East
EIAWD
816.7 MW
Nameplate Capacity
4
Generators
units
Conventional Steam Coal
Technology
1959
Operating Since
Location
Coordinates
42.8378, -105.7769
County
Converse, WY
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- Pioneer Wind Park, LLCWind80 MW · 14.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | PacifiCorp | PacifiCorp | — |
| Owner(s) | PacifiCorp | Berkshire Hathaway | — |
| Status | Operating | — | — |
Ownership Chain
About
The Dave Johnston power plant is located in Converse County, Wyoming. The plant has a total capacity of 816.7 MW across four generators using conventional steam coal technology and subbituminous coal (SUB) as its primary fuel. The plant began operating in 1959. PacifiCorp operates the facility, while Berkshire Hathaway is the parent company. Dave Johnston ranks as the second-largest of six coal plants in Wyoming, and 40th out of 75 coal plants nationally. The plant operates within the PacifiCorp - East balancing authority in the Western Electricity Coordinating Council (WECC) NERC region.
In the latest year of reported generation, the plant produced 4,273,471 MWh, achieving a capacity factor of 59.8%. Financial data indicates an installed cost of $1,268.6 per kW, based on FERC and FERC EQ data. The plant also has a reported PPA price of $10.78 per MWh.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
PacifiCorp - East
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
191.8K MWh
Latest Month
4.3M MWh
Annual Generation
59.8%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1, FERC Electric Quarterly ReportsHIGH
$10.8/MWh
PPA Price
PacifiCorp
Contract Seller
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Hazards·wildfire
Fires at Casper Business Center and Dave Johnston Power Plant during major power outage
Read about Wyoming Fire News: Fires at Casper Business Center and Dave Johnston Power Plant during incident from Your Wyoming Link featured...
Casper Business Center (other)Dave Johnston Power Plant (other)
dailydispatch.com·4 months ago
Grid·outage
Pacific Power outage: Did Dave Johnston Plant fire cause blackouts in Oregon, Wyoming and South Dakota? Details here | Hindustan Times
A major power outage hit several cities in South Dakota and Wyoming on Thursday afternoon, with Rapid City and Casper among the most...
Pacific Power (operator)Dave Johnston Plant (other)
Hindustan Times·4 months ago
Hazards·wildfire
Fires at Casper Business Center and Dave Johnston Power Plant during major power outage
In the middle of a widespread power outage two fires also began in Central Wyoming on Thursday.
Casper Business Center (other)Dave Johnston Power Plant (other)
Your Wyoming Link·4 months ago
Grid·outage
Wyoming Power Outage Details: Causes And Impact On Communities
A widespread power outage swept across multiple states Thursday, cutting electricity to an estimated 95,000 Wyoming customers and possibly...
Wyoming (other)South Dakota (other)
K2 Radio·4 months ago
Last updated 2026-03-14
View all 10 articles