County annual report · FIPS 56003
2020 Big Horn County, WY Power Outage Report
In 2020, customers in Big Horn County, WY went without power for an average of 2.9 hours, a total of 11K customer-hours (Wyoming average 3.4 hours). That ranks 10th worst of 22 Wyoming counties and 1932nd of 3,019 nationally.
Compared with WY, the US and 2019
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Big Horn County, 2020
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 1, 2020 19:45 | August 1, 2020 22:45 | 3h | 2,279 | 5,477 |
| 2 | November 16, 2020 16:45 | November 16, 2020 20:00 | 3h 15m | 1,663 | 871 |
| 3 | October 31, 2020 15:30 | October 31, 2020 16:00 | 30m | 1,434 | 444 |
| 4 | June 11, 2020 22:00 | June 12, 2020 00:15 | 2h 15m | 871 | 1,752 |
| 5 | April 30, 2020 18:45 | April 30, 2020 23:45 | 5h | 240 | 362 |
| 6 | April 9, 2020 15:15 | April 9, 2020 20:15 | 5h | 236 | 64 |
| 7 | May 27, 2020 20:30 | May 27, 2020 22:15 | 1h 45m | 211 | 199 |
| 8 | May 15, 2020 04:30 | May 15, 2020 05:00 | 30m | 174 | 87 |
| 9 | May 18, 2020 01:00 | May 18, 2020 01:30 | 30m | 174 | 50 |
| 10 | June 6, 2020 05:00 | June 6, 2020 07:15 | 2h 15m | 130 | 59 |
Outage episodes by size in 2020: 11 reached 100+ customers, 3 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 2020, 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 | 2020 | 6.8 hrs | 1.88 | 2.0 hrs | 1.22 |
| Powder River Energy Corp | 2020 | 4.8 hrs | 2.30 | 3.2 hrs | 1.94 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High Plains Power Inc | - | - | - | - | - |
| 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 71% of Wyoming's customers in 2020; 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, 2020, 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/2020/wyoming/big-horn-county