County annual report · FIPS 49043
2017 Summit County, UT Power Outage Report
In 2017, customers in Summit County, UT went without power for an average of 3.9 hours, a total of 70K customer-hours (Utah average 1.0 hours). That ranks 6th worst of 26 Utah counties and 1144th 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 Summit 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 | November 15, 2017 18:15 | November 15, 2017 22:45 | 4h 30m | 2,607 | 2,305 |
| 2 | October 20, 2017 18:45 | October 20, 2017 21:00 | 2h 15m | 1,923 | 1,616 |
| 3 | October 13, 2017 05:15 | October 13, 2017 11:15 | 6h | 1,749 | 10K |
| 4 | September 1, 2017 23:45 | September 2, 2017 00:00 | 15m | 1,747 | 437 |
| 5 | September 24, 2017 16:30 | September 25, 2017 21:15 | 1d 4h | 1,721 | 18K |
| 6 | August 8, 2017 05:15 | August 8, 2017 08:00 | 2h 45m | 1,625 | 3,287 |
| 7 | August 29, 2017 12:45 | August 29, 2017 21:00 | 8h 15m | 1,522 | 3,923 |
| 8 | December 11, 2017 18:15 | December 11, 2017 19:30 | 1h 15m | 1,367 | 1,709 |
| 9 | October 30, 2017 15:15 | October 30, 2017 21:45 | 6h 30m | 1,006 | 297 |
| 10 | November 19, 2017 23:30 | November 20, 2017 03:30 | 4h | 938 | 2,964 |
Outage episodes by size in 2017: 32 reached 100+ customers, 9 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 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 |
| 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 2017; 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, 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/summit-county