County annual report · FIPS 30047
2018 Lake County, MT Power Outage Report
In 2018, customers in Lake County, MT went without power for an average of 0.4 hours, a total of 11K customer-hours (Montana average 1.9 hours). That ranks 12th worst of 20 Montana counties and 2527th of 2,798 nationally.
Compared with MT, the US and 2017
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Lake 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 | November 5, 2018 19:45 | November 5, 2018 21:45 | 2h | 466 | 245 |
| 2 | June 11, 2018 01:30 | June 11, 2018 07:45 | 6h 15m | 434 | 2,313 |
| 3 | February 9, 2018 00:15 | February 9, 2018 15:00 | 14h 45m | 349 | 2,953 |
| 4 | January 4, 2018 20:00 | January 5, 2018 02:30 | 6h 30m | 316 | 1,421 |
| 5 | January 6, 2018 11:45 | January 6, 2018 18:30 | 6h 45m | 239 | 622 |
| 6 | March 31, 2018 08:30 | March 31, 2018 14:15 | 5h 45m | 220 | 1,177 |
| 7 | October 26, 2018 03:45 | October 26, 2018 06:00 | 2h 15m | 114 | 257 |
| 8 | April 1, 2018 21:15 | April 1, 2018 23:45 | 2h 30m | 75 | 188 |
| 9 | July 2, 2018 19:30 | July 2, 2018 21:15 | 1h 45m | 52 | 84 |
| 10 | May 27, 2018 21:15 | May 27, 2018 23:45 | 2h 30m | 37 | 90 |
Outage episodes by size in 2018: 7 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 Lake 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 |
|---|---|---|---|---|---|
| Missoula Electric Coop, Inc | 2018 | 4.0 hrs | 1.49 | 2.8 hrs | 1.31 |
| Flathead Electric Coop Inc | 2018 | 2.8 hrs | 1.56 | 2.8 hrs | 1.56 |
| 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 16% of Montana's customers in 2018; 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, 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/montana/lake-county