County annual report · FIPS 49045
2017 Tooele County, UT Power Outage Report
In 2017, customers in Tooele County, UT went without power for an average of 2.0 hours, a total of 57K customer-hours (Utah average 1.0 hours). That ranks 10th worst of 26 Utah counties and 1638th of 2,786 nationally.
Compared with UT, the US
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Tooele County, 2017
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 27, 2017 22:30 | August 28, 2017 06:15 | 7h 45m | 11,178 | 23K |
| 2 | October 16, 2017 13:15 | October 16, 2017 23:15 | 10h | 2,723 | 7,711 |
| 3 | December 14, 2017 23:15 | December 15, 2017 00:00 | 45m | 2,564 | 1,280 |
| 4 | September 19, 2017 14:00 | September 19, 2017 21:30 | 7h 30m | 2,530 | 4,898 |
| 5 | September 8, 2017 19:45 | September 9, 2017 01:30 | 5h 45m | 2,231 | 3,393 |
| 6 | May 6, 2017 20:15 | May 7, 2017 02:15 | 6h | 805 | 4,603 |
| 7 | November 19, 2017 02:30 | November 19, 2017 13:30 | 11h | 574 | 2,407 |
| 8 | November 5, 2017 22:45 | November 6, 2017 20:45 | 22h | 304 | 1,247 |
| 9 | August 23, 2017 07:00 | August 24, 2017 04:00 | 21h | 289 | 1,503 |
| 10 | November 15, 2017 16:15 | November 15, 2017 21:15 | 5h | 175 | 314 |
Outage episodes by size in 2017: 16 reached 100+ customers, 5 reached 1,000+ customers, 1 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 2017, 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 | 2017 | 5.2 hrs | 2.01 | 2.4 hrs | 1.43 |
| 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 2017; 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, 2017, 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/2017/utah/tooele-county