County annual report · FIPS 56013
2021 Fremont County, WY Power Outage Report
In 2021, customers in Fremont County, WY went without power for an average of 1.5 hours, a total of 41K customer-hours (Wyoming average 2.2 hours). That ranks 13th worst of 20 Wyoming counties and 2461st 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 Fremont 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 | July 2, 2021 04:15 | July 2, 2021 07:45 | 3h 30m | 5,307 | 19K |
| 2 | December 9, 2021 07:00 | December 9, 2021 08:30 | 1h 30m | 5,041 | 1,320 |
| 3 | August 20, 2021 05:45 | August 20, 2021 08:45 | 3h | 2,807 | 8,418 |
| 4 | October 28, 2021 06:00 | October 28, 2021 07:30 | 1h 30m | 1,291 | 1,937 |
| 5 | March 14, 2021 05:30 | March 14, 2021 21:30 | 16h | 438 | 1,607 |
| 6 | August 15, 2021 01:45 | August 15, 2021 05:00 | 3h 15m | 317 | 877 |
| 7 | August 15, 2021 18:00 | August 15, 2021 21:45 | 3h 45m | 290 | 730 |
| 8 | February 21, 2021 10:30 | February 21, 2021 14:30 | 4h | 271 | 508 |
| 9 | July 8, 2021 01:00 | July 8, 2021 03:15 | 2h 15m | 253 | 311 |
| 10 | November 1, 2021 16:15 | November 1, 2021 18:15 | 2h | 202 | 354 |
Outage episodes by size in 2021: 20 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 Fremont 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| High Plains Power Inc | - | - | - | - | - |
| Midvale Irrigation District | - | - | - | - | - |
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 ÷ 26,823 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. Fremont County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Fremont 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/fremont-county