County annual report · FIPS 16033
2018 Clark County, ID Power Outage Report
In 2018, customers in Clark County, ID went without power for an average of 8.7 hours, a total of 5,974 customer-hours (Idaho average 2.0 hours). That ranks 11th worst of 44 Idaho counties and 646th of 2,798 nationally.
Compared with ID, the US and 2017
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Clark 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 | December 16, 2018 15:15 | December 16, 2018 17:15 | 2h | 547 | 1,094 |
| 2 | November 12, 2018 19:15 | November 12, 2018 19:45 | 30m | 543 | 137 |
| 3 | September 6, 2018 05:00 | September 6, 2018 17:30 | 12h 30m | 268 | 854 |
| 4 | April 24, 2018 12:00 | April 24, 2018 12:45 | 45m | 244 | 183 |
| 5 | July 24, 2018 14:45 | July 24, 2018 22:00 | 7h 15m | 244 | 734 |
| 6 | July 31, 2018 12:45 | July 31, 2018 15:15 | 2h 30m | 243 | 596 |
| 7 | November 6, 2018 20:45 | November 7, 2018 05:15 | 8h 30m | 86 | 527 |
| 8 | April 25, 2018 15:15 | April 25, 2018 15:45 | 30m | 64 | 32 |
| 9 | August 9, 2018 22:45 | August 10, 2018 00:00 | 1h 15m | 62 | 78 |
| 10 | August 16, 2018 01:15 | August 16, 2018 03:30 | 2h 15m | 62 | 140 |
Outage episodes by size in 2018: 6 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 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 |
| Fall River Rural Elec Coop Inc | 2018 | 4.6 hrs | 2.31 | 4.2 hrs | 2.11 |
| 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 91% of Idaho's customers in 2018; 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, 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/idaho/clark-county