County annual report · FIPS 16059
2025 Lemhi County, ID Power Outage Report
In 2025, customers in Lemhi County, ID went without power for an average of 9.0 hours, a total of 34K customer-hours (Idaho average 5.6 hours). That ranks 19th worst of 43 Idaho counties and 891st of 3,000 nationally.
Compared with ID, the US and 2024
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Lemhi County, 2025
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 12, 2025 21:00 | June 12, 2025 23:30 | 2h 30m | 2,113 | 3,239 |
| 2 | May 10, 2025 21:45 | May 11, 2025 00:15 | 2h 30m | 1,412 | 3,094 |
| 3 | November 19, 2025 20:45 | November 19, 2025 21:00 | 15m | 831 | 208 |
| 4 | September 6, 2025 14:45 | September 6, 2025 16:30 | 1h 45m | 830 | 1,259 |
| 5 | September 9, 2025 06:30 | September 9, 2025 10:15 | 3h 45m | 830 | 3,113 |
| 6 | April 28, 2025 04:15 | April 28, 2025 07:15 | 3h | 805 | 1,508 |
| 7 | August 25, 2025 07:00 | August 25, 2025 07:45 | 45m | 693 | 520 |
| 8 | August 25, 2025 12:45 | August 25, 2025 13:45 | 1h | 688 | 688 |
| 9 | August 27, 2025 01:30 | August 27, 2025 02:30 | 1h | 688 | 688 |
| 10 | April 30, 2025 16:45 | April 30, 2025 18:15 | 1h 30m | 647 | 876 |
Outage episodes by size in 2025: 36 reached 100+ customers, 2 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 2025, 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 | 2024 | 6.0 hrs | 1.97 | 5.0 hrs | 1.84 |
| Salmon River Electric Coop Inc | 2024 | 3.3 hrs | 2.00 | 3.3 hrs | 2.00 |
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 Idaho's customers in 2025; 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, 2025, 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/2025/idaho/lemhi-county