County annual report · FIPS 49045
2023 Tooele County, UT Power Outage Report
In 2023, customers in Tooele County, UT went without power for an average of 2.5 hours, a total of 73K customer-hours (Utah average 2.5 hours). That ranks 13th worst of 26 Utah counties and 2108th of 2,977 nationally.
Compared with UT, the US and 2022
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Tooele County, 2023
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 12, 2023 14:00 | July 13, 2023 06:00 | 16h | 3,481 | 9,332 |
| 2 | April 18, 2023 07:15 | April 19, 2023 03:30 | 20h 15m | 2,582 | 3,334 |
| 3 | October 13, 2023 05:15 | October 13, 2023 06:00 | 45m | 1,960 | 1,470 |
| 4 | July 19, 2023 22:45 | July 21, 2023 03:15 | 1d 4h | 1,626 | 6,780 |
| 5 | March 5, 2023 12:15 | March 5, 2023 12:45 | 30m | 1,611 | 403 |
| 6 | November 27, 2023 10:15 | November 27, 2023 14:00 | 3h 45m | 1,452 | 3,087 |
| 7 | March 31, 2023 14:15 | March 31, 2023 16:30 | 2h 15m | 1,332 | 629 |
| 8 | June 1, 2023 21:30 | June 2, 2023 06:15 | 8h 45m | 1,244 | 4,354 |
| 9 | August 1, 2023 13:15 | August 1, 2023 22:30 | 9h 15m | 1,085 | 296 |
| 10 | June 30, 2023 17:00 | June 30, 2023 22:30 | 5h 30m | 1,081 | 1,355 |
Outage episodes by size in 2023: 50 reached 100+ customers, 12 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 Tooele County reported on EIA Form 861 for 2023, 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 | 2023 | 8.2 hrs | 1.42 | 1.9 hrs | 0.99 |
| Mt Wheeler Power, Inc | - | - | - | - | - |
| Wells Rural Electric Co | - | - | - | - | - |
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 Utah's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 28,885 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. Tooele County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Tooele County, UT annual power outage report, 2023, 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/2023/utah/tooele-county