County annual report · FIPS 49007
2021 Carbon County, UT Power Outage Report
In 2021, customers in Carbon County, UT went without power for an average of 2.4 hours, a total of 9,135 customer-hours (Utah average 2.6 hours). That ranks 18th worst of 25 Utah counties and 2079th of 2,974 nationally.
Compared with UT, the US and 2020
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Carbon 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 | March 11, 2021 19:15 | March 11, 2021 21:00 | 1h 45m | 2,224 | 1,113 |
| 2 | April 9, 2021 19:30 | April 10, 2021 03:15 | 7h 45m | 1,245 | 518 |
| 3 | February 12, 2021 19:30 | February 12, 2021 22:30 | 3h | 588 | 1,684 |
| 4 | February 3, 2021 22:00 | February 4, 2021 01:45 | 3h 45m | 587 | 207 |
| 5 | April 14, 2021 18:30 | April 14, 2021 19:45 | 1h 15m | 377 | 109 |
| 6 | May 8, 2021 02:15 | May 8, 2021 06:45 | 4h 30m | 206 | 100 |
| 7 | January 22, 2021 17:15 | January 22, 2021 21:00 | 3h 45m | 115 | 431 |
| 8 | April 26, 2021 16:15 | April 26, 2021 17:30 | 1h 15m | 114 | 143 |
| 9 | July 29, 2021 22:15 | July 30, 2021 12:30 | 14h 15m | 111 | 702 |
| 10 | December 1, 2021 16:15 | December 2, 2021 00:15 | 8h | 64 | 508 |
Outage episodes by size in 2021: 9 reached 100+ customers, 2 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 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 |
| City of Helper - (UT) | - | - | - | - | - |
| Price Municipal Corporation | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 79% of Utah's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,849 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, UT 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/utah/carbon-county