County annual report · FIPS 49045
2018 Tooele County, UT Power Outage Report
In 2018, customers in Tooele County, UT went without power for an average of 2.8 hours, a total of 82K customer-hours (Utah average 1.9 hours). That ranks 13th worst of 26 Utah counties and 1563rd of 2,798 nationally.
Compared with UT, the US and 2017
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Tooele 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 | November 22, 2018 06:15 | November 22, 2018 06:30 | 15m | 3,686 | 922 |
| 2 | September 15, 2018 17:30 | September 17, 2018 05:15 | 1d 11h | 3,265 | 8,449 |
| 3 | March 2, 2018 09:00 | March 3, 2018 11:00 | 1d 2h | 3,091 | 12K |
| 4 | November 6, 2018 23:15 | November 7, 2018 04:45 | 5h 30m | 3,050 | 5,140 |
| 5 | February 18, 2018 17:15 | February 19, 2018 18:30 | 1d 1h | 2,888 | 8,263 |
| 6 | April 16, 2018 15:30 | April 17, 2018 19:30 | 1d 4h | 2,197 | 7,935 |
| 7 | February 19, 2018 20:00 | February 19, 2018 20:45 | 45m | 1,249 | 936 |
| 8 | January 7, 2018 19:15 | January 7, 2018 21:15 | 2h | 1,091 | 1,637 |
| 9 | April 9, 2018 01:15 | April 9, 2018 13:45 | 12h 30m | 806 | 5,046 |
| 10 | May 2, 2018 18:15 | May 2, 2018 19:45 | 1h 30m | 776 | 833 |
Outage episodes by size in 2018: 49 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 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 |
| 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 80% of Utah's customers in 2018; 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, 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/utah/tooele-county