County annual report · FIPS 56035
2021 Sublette County, WY Power Outage Report
In 2021, customers in Sublette County, WY went without power for an average of 3.1 hours, a total of 16K customer-hours (Wyoming average 2.2 hours). That ranks 9th worst of 20 Wyoming counties and 1807th of 2,974 nationally.
Compared with WY, the US and 2020
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Sublette County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 16, 2021 00:45 | May 16, 2021 02:15 | 1h 30m | 4,170 | 5,214 |
| 2 | December 28, 2021 15:00 | December 28, 2021 22:30 | 7h 30m | 991 | 3,549 |
| 3 | July 12, 2021 23:00 | July 13, 2021 03:00 | 4h | 981 | 504 |
| 4 | April 9, 2021 01:15 | April 9, 2021 01:30 | 15m | 980 | 245 |
| 5 | May 22, 2021 21:00 | May 22, 2021 22:30 | 1h 30m | 415 | 623 |
| 6 | April 28, 2021 14:15 | April 28, 2021 17:30 | 3h 15m | 185 | 124 |
| 7 | July 29, 2021 12:00 | July 29, 2021 22:30 | 10h 30m | 178 | 349 |
| 8 | May 26, 2021 16:00 | May 26, 2021 16:15 | 15m | 139 | 35 |
| 9 | May 18, 2021 23:45 | May 19, 2021 10:45 | 11h | 136 | 605 |
| 10 | August 18, 2021 15:00 | August 18, 2021 21:30 | 6h 30m | 114 | 160 |
Outage episodes by size in 2021: 12 reached 100+ customers, 1 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 Sublette County reported on EIA Form 861 for 2021, 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 | 2021 | 4.3 hrs | 1.86 | 2.0 hrs | 1.19 |
| Lower Valley Energy 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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,123 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. Sublette County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sublette County, WY annual power outage report, 2021, 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/2021/wyoming/sublette-county