County annual report · FIPS 16059
2018 Lemhi County, ID Power Outage Report
In 2018, customers in Lemhi County, ID went without power for an average of 9.2 hours, a total of 34K customer-hours (Idaho average 2.0 hours). That ranks 10th worst of 44 Idaho counties and 609th 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 Lemhi 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 | June 15, 2018 05:15 | June 15, 2018 06:00 | 45m | 2,832 | 2,124 |
| 2 | June 12, 2018 05:15 | June 12, 2018 07:00 | 1h 45m | 2,767 | 4,672 |
| 3 | June 19, 2018 04:15 | June 19, 2018 07:15 | 3h | 2,190 | 2,212 |
| 4 | June 28, 2018 05:30 | June 28, 2018 08:45 | 3h 15m | 2,182 | 7,084 |
| 5 | July 12, 2018 20:45 | July 12, 2018 23:00 | 2h 15m | 930 | 500 |
| 6 | August 18, 2018 06:00 | August 18, 2018 10:30 | 4h 30m | 896 | 2,117 |
| 7 | August 17, 2018 17:15 | August 17, 2018 19:00 | 1h 45m | 717 | 1,255 |
| 8 | May 21, 2018 11:00 | May 21, 2018 14:15 | 3h 15m | 712 | 2,314 |
| 9 | April 25, 2018 15:15 | April 25, 2018 20:30 | 5h 15m | 707 | 3,712 |
| 10 | October 11, 2018 19:15 | October 11, 2018 20:00 | 45m | 685 | 514 |
Outage episodes by size in 2018: 19 reached 100+ customers, 4 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 Lemhi 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 |
|---|---|---|---|---|---|
| Idaho Power Co | 2018 | 2.3 hrs | 1.01 | 2.3 hrs | 1.00 |
| Salmon River 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 ÷ 3,727 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. Lemhi County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lemhi 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/lemhi-county