County annual report · FIPS 30047
2017 Lake County, MT Power Outage Report
In 2017, customers in Lake County, MT went without power for an average of 0.7 hours, a total of 17K customer-hours (Montana average 2.7 hours). That ranks 15th worst of 19 Montana counties and 2187th of 2,786 nationally.
Compared with MT, the US and 2016
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Lake County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 19, 2017 18:45 | September 19, 2017 20:45 | 2h | 1,485 | 380 |
| 2 | December 19, 2017 23:45 | December 20, 2017 09:30 | 9h 45m | 975 | 6,471 |
| 3 | October 17, 2017 23:45 | October 18, 2017 21:00 | 21h 15m | 958 | 4,464 |
| 4 | May 24, 2017 19:30 | May 24, 2017 20:30 | 1h | 874 | 656 |
| 5 | April 2, 2017 14:15 | April 2, 2017 17:30 | 3h 15m | 310 | 713 |
| 6 | September 15, 2017 07:15 | September 15, 2017 10:00 | 2h 45m | 125 | 34 |
| 7 | December 17, 2017 07:00 | December 17, 2017 16:45 | 9h 45m | 101 | 985 |
| 8 | December 20, 2017 13:45 | December 20, 2017 22:30 | 8h 45m | 99 | 641 |
| 9 | June 9, 2017 00:00 | June 9, 2017 10:45 | 10h 45m | 90 | 735 |
| 10 | August 15, 2017 05:00 | August 15, 2017 08:15 | 3h 15m | 57 | 185 |
Outage episodes by size in 2017: 7 reached 100+ customers, 1 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 2017, 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 | 2017 | 11.8 hrs | 2.54 | 4.3 hrs | 1.88 |
| Flathead Electric Coop Inc | 2017 | 6.1 hrs | 2.20 | 3.5 hrs | 1.48 |
| 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 2017; 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, 2017, 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/2017/montana/lake-county