County annual report · FIPS 30047
2020 Lake County, MT Power Outage Report
In 2020, customers in Lake County, MT went without power for an average of 4.0 hours, a total of 97K customer-hours (Montana average 5.6 hours). That ranks 31st worst of 50 Montana counties and 1597th of 3,019 nationally.
Compared with MT, the US and 2019
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Lake County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 31, 2020 14:00 | June 3, 2020 19:00 | 3d 5h | 2,014 | 35K |
| 2 | February 1, 2020 18:15 | February 2, 2020 19:00 | 1d | 1,313 | 15K |
| 3 | July 14, 2020 14:15 | July 14, 2020 21:00 | 6h 45m | 1,029 | 3,522 |
| 4 | October 16, 2020 02:15 | October 16, 2020 04:15 | 2h | 1,026 | 1,895 |
| 5 | November 18, 2020 22:45 | November 18, 2020 23:00 | 15m | 1,026 | 257 |
| 6 | March 13, 2020 20:00 | March 18, 2020 01:15 | 4d 5h | 982 | 35K |
| 7 | December 22, 2020 12:30 | December 22, 2020 14:30 | 2h | 913 | 1,627 |
| 8 | October 24, 2020 15:45 | October 24, 2020 19:15 | 3h 30m | 323 | 691 |
| 9 | December 9, 2020 16:30 | December 9, 2020 17:30 | 1h | 233 | 233 |
| 10 | October 30, 2020 18:30 | October 30, 2020 19:15 | 45m | 231 | 110 |
Outage episodes by size in 2020: 11 reached 100+ customers, 5 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 2020, 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 | 2020 | 6.0 hrs | 2.00 | 6.0 hrs | 2.00 |
| Flathead Electric Coop Inc | 2020 | 14.5 hrs | 2.38 | 2.9 hrs | 1.02 |
| 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 76% of Montana's customers in 2020; 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, 2020, 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/2020/montana/lake-county