County annual report · FIPS 16059
2015 Lemhi County, ID Power Outage Report
In 2015, customers in Lemhi County, ID went without power for an average of 4.9 hours, a total of 18K customer-hours (Idaho average 2.6 hours). That ranks 8th worst of 31 Idaho counties and 588th of 2,484 nationally.
Compared with ID, the US
Coverage line is EAGLE-I's share of Idaho customers tracked each year.
Biggest outages in Lemhi County, 2015
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 5, 2015 17:30 | August 5, 2015 18:45 | 1h 15m | 5,679 | 7,099 |
| 2 | September 17, 2015 16:30 | September 17, 2015 17:45 | 1h 15m | 5,322 | 6,302 |
| 3 | September 28, 2015 05:45 | September 28, 2015 06:45 | 1h | 921 | 921 |
| 4 | August 14, 2015 22:30 | August 15, 2015 05:00 | 6h 30m | 421 | 2,354 |
| 5 | August 5, 2015 21:15 | August 5, 2015 23:15 | 2h | 306 | 612 |
| 6 | August 10, 2015 22:30 | August 11, 2015 00:30 | 2h | 247 | 494 |
| 7 | August 30, 2015 10:00 | August 30, 2015 11:00 | 1h | 167 | 167 |
| 8 | August 13, 2015 23:15 | August 14, 2015 02:30 | 3h 15m | 69 | 80 |
| 9 | September 1, 2015 16:00 | September 1, 2015 17:45 | 1h 45m | 41 | 72 |
Outage episodes by size in 2015: 7 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 2015, 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 | 2015 | 4.8 hrs | 1.76 | 4.4 hrs | 1.64 |
| 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 n/a of Idaho's customers in 2015; 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, 2015, 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/2015/idaho/lemhi-county