County annual report · FIPS 49043
2023 Summit County, UT Power Outage Report
In 2023, customers in Summit County, UT went without power for an average of 9.2 hours, a total of 166K customer-hours (Utah average 2.5 hours). That ranks 4th worst of 26 Utah counties and 906th 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 Summit 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 | August 16, 2023 16:00 | August 17, 2023 03:00 | 11h | 4,674 | 5,653 |
| 2 | January 6, 2023 20:00 | January 7, 2023 10:45 | 14h 45m | 3,395 | 5,190 |
| 3 | July 3, 2023 22:30 | July 5, 2023 10:30 | 1d 12h | 2,723 | 2,639 |
| 4 | November 15, 2023 16:15 | November 16, 2023 02:00 | 9h 45m | 2,711 | 10K |
| 5 | January 1, 2023 08:30 | January 1, 2023 15:45 | 7h 15m | 2,708 | 956 |
| 6 | September 9, 2023 14:00 | September 10, 2023 12:15 | 22h 15m | 2,497 | 17K |
| 7 | July 22, 2023 13:30 | July 22, 2023 15:00 | 1h 30m | 2,323 | 2,577 |
| 8 | June 29, 2023 17:00 | June 30, 2023 04:00 | 11h | 2,170 | 4,394 |
| 9 | October 3, 2023 05:15 | October 3, 2023 12:45 | 7h 30m | 2,167 | 8,346 |
| 10 | April 25, 2023 04:30 | April 25, 2023 11:45 | 7h 15m | 1,506 | 2,697 |
Outage episodes by size in 2023: 65 reached 100+ customers, 15 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 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 |
| 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 n/a of Utah's customers in 2023; 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, 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/summit-county