County annual report · FIPS 56007
2025 Carbon County, WY Power Outage Report
In 2025, customers in Carbon County, WY went without power for an average of 10.1 hours, a total of 109K customer-hours (Wyoming average 3.8 hours). That ranks 5th worst of 20 Wyoming counties and 790th of 3,000 nationally.
Compared with WY, the US and 2024
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Carbon County, 2025
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 25, 2025 02:15 | August 25, 2025 17:45 | 15h 30m | 5,551 | 84K |
| 2 | June 29, 2025 02:30 | June 29, 2025 04:15 | 1h 45m | 3,107 | 3,884 |
| 3 | February 17, 2025 04:00 | February 17, 2025 12:45 | 8h 45m | 3,095 | 1,556 |
| 4 | August 2, 2025 22:30 | August 3, 2025 02:30 | 4h | 767 | 3,065 |
| 5 | September 12, 2025 05:15 | September 12, 2025 05:30 | 15m | 766 | 192 |
| 6 | June 20, 2025 17:00 | June 20, 2025 20:30 | 3h 30m | 765 | 2,676 |
| 7 | August 10, 2025 20:45 | August 11, 2025 01:45 | 5h | 765 | 3,825 |
| 8 | May 21, 2025 05:30 | May 21, 2025 07:00 | 1h 30m | 761 | 1,142 |
| 9 | March 22, 2025 22:30 | March 23, 2025 12:30 | 14h | 644 | 1,439 |
| 10 | December 22, 2025 04:00 | December 22, 2025 06:15 | 2h 15m | 542 | 328 |
Outage episodes by size in 2025: 14 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 Carbon County reported on EIA Form 861 for 2025, 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 | 2024 | 4.6 hrs | 1.67 | 2.0 hrs | 1.11 |
| High Plains Power Inc | 2024 | 5.2 hrs | - | 5.2 hrs | - |
| Yampa Valley Electric Assn Inc | 2024 | 4.9 hrs | 2.20 | 3.9 hrs | 1.94 |
| Carbon Power & Light, Inc | 2018 | 7.6 hrs | 1.56 | 2.5 hrs | 1.34 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Wyoming's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 10,767 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. Carbon County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Carbon County, WY annual power outage report, 2025, 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/2025/wyoming/carbon-county