County annual report · FIPS 56037
2018 Sweetwater County, WY Power Outage Report
In 2018, customers in Sweetwater County, WY went without power for an average of 1.8 hours, a total of 45K customer-hours (Wyoming average 1.2 hours). That ranks 8th worst of 21 Wyoming counties and 1967th of 2,798 nationally.
Compared with WY, the US and 2017
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Sweetwater County, 2018
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 11, 2018 14:30 | July 11, 2018 21:15 | 6h 45m | 6,095 | 3,065 |
| 2 | August 1, 2018 15:15 | August 1, 2018 22:15 | 7h | 5,811 | 8,135 |
| 3 | June 8, 2018 20:45 | June 8, 2018 22:45 | 2h | 4,123 | 4,743 |
| 4 | August 22, 2018 20:00 | August 22, 2018 23:45 | 3h 45m | 3,081 | 1,555 |
| 5 | July 9, 2018 16:15 | July 10, 2018 03:45 | 11h 30m | 2,209 | 2,370 |
| 6 | February 5, 2018 10:30 | February 5, 2018 15:45 | 5h 15m | 1,933 | 4,704 |
| 7 | December 30, 2018 01:45 | December 30, 2018 07:15 | 5h 30m | 1,370 | 3,582 |
| 8 | June 19, 2018 16:15 | June 19, 2018 19:00 | 2h 45m | 711 | 974 |
| 9 | November 28, 2018 16:45 | November 29, 2018 02:30 | 9h 45m | 271 | 1,193 |
| 10 | November 24, 2018 15:00 | November 24, 2018 22:45 | 7h 45m | 266 | 831 |
Outage episodes by size in 2018: 21 reached 100+ customers, 7 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 2018, 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 | 2018 | 3.2 hrs | 1.62 | 2.0 hrs | 1.25 |
| 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 62% of Wyoming's customers in 2018; 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, 2018, 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/2018/wyoming/sweetwater-county