County annual report · FIPS 56003
2024 Big Horn County, WY Power Outage Report
In 2024, customers in Big Horn County, WY went without power for an average of 2.6 hours, a total of 10K customer-hours (Wyoming average 2.4 hours). That ranks 10th worst of 20 Wyoming counties and 2242nd of 2,990 nationally.
Compared with WY, the US and 2023
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Big Horn County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 16, 2024 03:30 | April 16, 2024 05:15 | 1h 45m | 1,656 | 2,484 |
| 2 | June 23, 2024 16:00 | June 23, 2024 18:30 | 2h 30m | 1,652 | 2,103 |
| 3 | February 21, 2024 04:00 | February 21, 2024 07:00 | 3h | 751 | 2,067 |
| 4 | January 15, 2024 22:15 | January 15, 2024 23:15 | 1h | 521 | 261 |
| 5 | January 18, 2024 10:00 | January 18, 2024 12:30 | 2h 30m | 521 | 133 |
| 6 | January 18, 2024 13:30 | January 18, 2024 13:45 | 15m | 521 | 130 |
| 7 | April 6, 2024 17:30 | April 6, 2024 21:30 | 4h | 366 | 859 |
| 8 | August 13, 2024 19:15 | August 13, 2024 22:00 | 2h 45m | 315 | 866 |
| 9 | June 10, 2024 01:30 | June 10, 2024 02:15 | 45m | 152 | 80 |
| 10 | July 26, 2024 22:45 | July 27, 2024 02:15 | 3h 30m | 131 | 317 |
Outage episodes by size in 2024: 10 reached 100+ customers, 2 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 Big Horn County reported on EIA Form 861 for 2024, 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 | 2024 | 4.6 hrs | 1.67 | 2.0 hrs | 1.11 |
| High Plains Power Inc | 2024 | 5.2 hrs | - | 5.2 hrs | - |
| Powder River Energy Corp | 2024 | 8.3 hrs | 2.88 | 4.9 hrs | 2.24 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Garland Light & Power Company | - | - | - | - | - |
| City of Deaver - (WY) | - | - | - | - | - |
| Town of Basin - (WY) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Wyoming's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,930 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. Big Horn County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Big Horn County, WY annual power outage report, 2024, 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/2024/wyoming/big-horn-county