County annual report · FIPS 49005
2021 Cache County, UT Power Outage Report
In 2021, customers in Cache County, UT went without power for an average of 2.5 hours, a total of 125K customer-hours (Utah average 2.6 hours). That ranks 15th worst of 25 Utah counties and 2029th of 2,974 nationally.
Compared with UT, the US and 2020
Coverage line is EAGLE-I's share of Utah customers tracked each year.
Biggest outages in Cache County, 2021
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 13, 2021 05:30 | August 13, 2021 07:30 | 2h | 11,023 | 20K |
| 2 | October 12, 2021 06:15 | October 16, 2021 03:45 | 3d 21h | 8,369 | 65K |
| 3 | February 16, 2021 17:15 | February 16, 2021 20:15 | 3h | 3,771 | 951 |
| 4 | October 18, 2021 21:15 | October 19, 2021 05:30 | 8h 15m | 3,616 | 5,587 |
| 5 | September 21, 2021 23:15 | September 22, 2021 01:30 | 2h 15m | 1,985 | 589 |
| 6 | June 8, 2021 17:45 | June 8, 2021 19:45 | 2h | 1,789 | 1,348 |
| 7 | January 17, 2021 20:30 | January 18, 2021 01:00 | 4h 30m | 1,777 | 449 |
| 8 | July 16, 2021 20:30 | July 17, 2021 03:15 | 6h 45m | 1,084 | 1,295 |
| 9 | July 9, 2021 01:45 | July 9, 2021 03:30 | 1h 45m | 1,052 | 337 |
| 10 | June 5, 2021 02:45 | June 5, 2021 07:15 | 4h 30m | 978 | 1,470 |
Outage episodes by size in 2021: 43 reached 100+ customers, 9 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 Cache County reported on EIA Form 861 for 2021, 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 | 2021 | 4.3 hrs | 1.86 | 2.0 hrs | 1.19 |
| City of Logan - (UT) | 2021 | 2.6 hrs | 1.00 | 16 min | 0.37 |
| Hyrum City Corporation | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 79% of Utah's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 49,744 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. Cache County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Cache County, UT annual power outage report, 2021, 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/2021/utah/cache-county