County annual report · FIPS 56037
2020 Sweetwater County, WY Power Outage Report
In 2020, customers in Sweetwater County, WY went without power for an average of 6.8 hours, a total of 173K customer-hours (Wyoming average 3.4 hours). That ranks 6th worst of 22 Wyoming counties and 1117th 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 Sweetwater 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 | September 8, 2020 02:30 | September 11, 2020 03:15 | 3d | 6,789 | 135K |
| 2 | June 6, 2020 09:45 | June 8, 2020 05:00 | 1d 19h | 2,240 | 11K |
| 3 | September 6, 2020 04:45 | September 6, 2020 11:15 | 6h 30m | 1,418 | 2,830 |
| 4 | April 15, 2020 22:15 | April 16, 2020 04:45 | 6h 30m | 1,348 | 1,740 |
| 5 | April 27, 2020 15:45 | April 27, 2020 19:45 | 4h | 1,293 | 332 |
| 6 | August 28, 2020 05:15 | August 28, 2020 07:30 | 2h 15m | 1,039 | 2,338 |
| 7 | August 2, 2020 21:15 | August 3, 2020 02:30 | 5h 15m | 443 | 889 |
| 8 | January 14, 2020 16:15 | January 15, 2020 00:15 | 8h | 413 | 294 |
| 9 | February 17, 2020 03:00 | February 17, 2020 05:00 | 2h | 406 | 711 |
| 10 | March 29, 2020 23:30 | March 30, 2020 05:00 | 5h 30m | 402 | 708 |
Outage episodes by size in 2020: 29 reached 100+ customers, 6 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 Sweetwater 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Bridger Valley Elec Assn, 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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 25,475 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. Sweetwater County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sweetwater 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/sweetwater-county