County annual report · FIPS 16033
2021 Clark County, ID Power Outage Report
In 2021, customers in Clark County, ID went without power for an average of 6.7 hours, a total of 4,558 customer-hours (Idaho average 5.7 hours). That ranks 14th worst of 43 Idaho counties and 1072nd of 2,974 nationally.
Compared with ID, the US and 2020
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Clark 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 2, 2021 23:15 | August 3, 2021 03:15 | 4h | 478 | 1,603 |
| 2 | August 1, 2021 04:45 | August 1, 2021 05:15 | 30m | 234 | 59 |
| 3 | October 26, 2021 11:00 | October 26, 2021 11:30 | 30m | 218 | 109 |
| 4 | December 13, 2021 23:30 | December 14, 2021 00:15 | 45m | 96 | 72 |
| 5 | November 2, 2021 16:00 | November 2, 2021 23:30 | 7h 30m | 65 | 302 |
| 6 | May 30, 2021 20:30 | May 30, 2021 23:00 | 2h 30m | 63 | 142 |
| 7 | October 18, 2021 09:15 | October 18, 2021 15:30 | 6h 15m | 63 | 317 |
| 8 | July 30, 2021 13:45 | July 30, 2021 22:15 | 8h 30m | 60 | 484 |
| 9 | August 22, 2021 15:00 | August 23, 2021 00:00 | 9h | 41 | 61 |
| 10 | June 10, 2021 14:45 | June 10, 2021 17:30 | 2h 45m | 37 | 92 |
Outage episodes by size in 2021: 3 reached 100+ customers, 0 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 Clark 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 |
| Fall River Rural Elec Coop Inc | 2021 | 71 min | 0.61 | 57 min | 0.50 |
| Vigilante Electric Coop, 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 90% of Idaho's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 685 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. Clark County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Clark County, ID 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/idaho/clark-county