County annual report · FIPS 30047
2015 Lake County, MT Power Outage Report
In 2015, customers in Lake County, MT went without power for an average of 0.5 hours, a total of 12K customer-hours (Montana average 2.3 hours). That ranks 3rd worst of 5 Montana counties and 2064th of 2,484 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Lake County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 18, 2015 06:45 | November 18, 2015 07:00 | 15m | 2,811 | 703 |
| 2 | June 1, 2015 21:30 | June 1, 2015 22:30 | 1h | 2,808 | 2,808 |
| 3 | June 3, 2015 17:15 | June 3, 2015 17:30 | 15m | 2,808 | 702 |
| 4 | June 6, 2015 10:15 | June 6, 2015 11:00 | 45m | 2,330 | 1,748 |
| 5 | April 26, 2015 14:30 | April 26, 2015 14:45 | 15m | 1,503 | 376 |
| 6 | November 18, 2015 07:45 | November 18, 2015 08:00 | 15m | 1,391 | 348 |
| 7 | November 18, 2015 11:15 | November 18, 2015 11:30 | 15m | 1,391 | 348 |
| 8 | November 18, 2015 12:15 | November 18, 2015 13:00 | 45m | 1,391 | 696 |
| 9 | November 18, 2015 13:45 | November 18, 2015 14:00 | 15m | 1,391 | 348 |
| 10 | January 6, 2015 05:45 | January 6, 2015 07:00 | 1h 15m | 430 | 416 |
Outage episodes by size in 2015: 15 reached 100+ customers, 9 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 Lake 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 |
|---|---|---|---|---|---|
| Missoula Electric Coop, Inc | 2015 | 4.9 hrs | 1.38 | 4.9 hrs | 1.38 |
| Flathead Electric Coop Inc | 2015 | 7.6 hrs | 1.87 | 3.1 hrs | 1.50 |
| USBIA-Mission Valley Power | - | - | - | - | - |
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 Montana's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 24,041 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. Lake County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lake County, MT 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/montana/lake-county