County annual report · FIPS 49045
2020 Tooele County, UT Power Outage Report
In 2020, customers in Tooele County, UT went without power for an average of 3.2 hours, a total of 92K customer-hours (Utah average 8.7 hours). That ranks 17th worst of 29 Utah counties and 1818th of 3,019 nationally.
Compared with UT, the US and 2019
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Tooele 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 | March 18, 2020 13:15 | March 19, 2020 12:30 | 23h 15m | 4,496 | 11K |
| 2 | October 27, 2020 15:15 | October 27, 2020 21:15 | 6h | 2,503 | 1,341 |
| 3 | November 17, 2020 21:00 | November 18, 2020 16:45 | 19h 45m | 1,891 | 4,008 |
| 4 | September 8, 2020 00:45 | September 10, 2020 13:15 | 2d 12h | 1,848 | 11K |
| 5 | June 6, 2020 09:45 | June 9, 2020 02:15 | 2d 16h | 1,778 | 25K |
| 6 | May 22, 2020 23:45 | May 24, 2020 21:15 | 1d 21h | 1,394 | 9,101 |
| 7 | July 8, 2020 19:15 | July 8, 2020 20:30 | 1h 15m | 1,270 | 953 |
| 8 | June 13, 2020 16:45 | June 13, 2020 18:30 | 1h 45m | 1,142 | 859 |
| 9 | March 22, 2020 01:15 | March 22, 2020 12:00 | 10h 45m | 784 | 1,487 |
| 10 | May 17, 2020 21:00 | May 19, 2020 10:45 | 1d 13h | 565 | 1,031 |
Outage episodes by size in 2020: 40 reached 100+ customers, 8 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 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 |
| 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 79% of Utah's customers in 2020; 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, 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/utah/tooele-county