County annual report · FIPS 56019
2022 Johnson County, WY Power Outage Report
In 2022, customers in Johnson County, WY went without power for an average of 5.4 hours, a total of 30K customer-hours (Wyoming average 2.4 hours). That ranks 4th worst of 20 Wyoming counties and 1321st of 2,976 nationally.
Compared with WY, the US and 2021
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Johnson County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 12, 2022 07:15 | August 12, 2022 08:00 | 45m | 3,889 | 1,947 |
| 2 | September 10, 2022 15:30 | September 10, 2022 16:00 | 30m | 1,256 | 314 |
| 3 | August 25, 2022 14:15 | August 25, 2022 16:30 | 2h 15m | 1,151 | 2,590 |
| 4 | January 14, 2022 20:45 | January 14, 2022 21:00 | 15m | 1,132 | 283 |
| 5 | August 7, 2022 05:00 | August 7, 2022 14:00 | 9h | 709 | 3,670 |
| 6 | December 21, 2022 15:45 | December 21, 2022 20:30 | 4h 45m | 592 | 1,149 |
| 7 | January 2, 2022 03:00 | January 2, 2022 08:00 | 5h | 463 | 1,491 |
| 8 | July 12, 2022 22:45 | July 13, 2022 00:45 | 2h | 389 | 296 |
| 9 | February 21, 2022 19:00 | February 21, 2022 20:00 | 1h | 381 | 381 |
| 10 | June 1, 2022 16:30 | June 1, 2022 18:00 | 1h 30m | 378 | 567 |
Outage episodes by size in 2022: 28 reached 100+ customers, 4 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Johnson County reported on EIA Form 861 for 2022, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| PacifiCorp | 2022 | 5.2 hrs | 1.58 | 1.8 hrs | 1.11 |
| Powder River Energy Corp | 2022 | 5.1 hrs | 2.30 | 4.4 hrs | 2.18 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| High Plains Power Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 71% of Wyoming's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,448 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Johnson County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, WY annual power outage report, 2022, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2022/wyoming/johnson-county