County annual report · FIPS 49043
2018 Summit County, UT Power Outage Report
In 2018, customers in Summit County, UT went without power for an average of 5.1 hours, a total of 92K customer-hours (Utah average 1.9 hours). That ranks 8th worst of 26 Utah counties and 1032nd 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 Summit 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 | July 18, 2018 16:15 | July 18, 2018 23:00 | 6h 45m | 2,669 | 4,872 |
| 2 | July 9, 2018 18:30 | July 10, 2018 11:30 | 17h | 2,608 | 3,572 |
| 3 | April 14, 2018 07:15 | April 14, 2018 09:15 | 2h | 2,594 | 5,186 |
| 4 | April 14, 2018 12:00 | April 14, 2018 23:00 | 11h | 2,594 | 2,003 |
| 5 | July 19, 2018 01:15 | July 19, 2018 05:45 | 4h 30m | 2,518 | 1,906 |
| 6 | April 16, 2018 21:15 | April 17, 2018 02:15 | 5h | 1,905 | 2,386 |
| 7 | May 30, 2018 11:30 | May 30, 2018 20:00 | 8h 30m | 1,883 | 3,089 |
| 8 | May 3, 2018 12:45 | May 3, 2018 22:00 | 9h 15m | 1,874 | 4,605 |
| 9 | February 15, 2018 06:00 | February 15, 2018 11:00 | 5h | 1,867 | 9,335 |
| 10 | February 2, 2018 00:00 | February 2, 2018 06:00 | 6h | 1,421 | 4,057 |
Outage episodes by size in 2018: 47 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 Summit 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 |
| Bridger Valley Elec Assn, Inc | - | - | - | - | - |
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 ÷ 18,106 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. Summit County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Summit 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/summit-county