County annual report · FIPS 30029
2021 Flathead County, MT Power Outage Report
In 2021, customers in Flathead County, MT went without power for an average of 8.3 hours, a total of 541K customer-hours (Montana average 5.0 hours). That ranks 16th worst of 51 Montana counties and 914th of 2,974 nationally.
Compared with MT, the US and 2020
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Flathead County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 13, 2021 14:15 | January 19, 2021 00:00 | 5d 9h | 10,795 | 304K |
| 2 | December 29, 2021 21:30 | December 30, 2021 00:15 | 2h 45m | 6,599 | 9,634 |
| 3 | November 15, 2021 23:45 | November 19, 2021 00:15 | 3d | 6,546 | 101K |
| 4 | June 13, 2021 20:00 | June 14, 2021 00:15 | 4h 15m | 4,280 | 7,001 |
| 5 | February 17, 2021 21:00 | February 18, 2021 00:45 | 3h 45m | 3,933 | 4,337 |
| 6 | March 28, 2021 21:00 | March 29, 2021 12:15 | 15h 15m | 2,529 | 16K |
| 7 | June 15, 2021 15:15 | June 15, 2021 17:15 | 2h | 2,233 | 560 |
| 8 | October 21, 2021 17:45 | October 21, 2021 23:15 | 5h 30m | 2,230 | 575 |
| 9 | June 27, 2021 05:00 | June 27, 2021 07:00 | 2h | 2,034 | 2,794 |
| 10 | May 24, 2021 04:45 | May 24, 2021 09:15 | 4h 30m | 1,642 | 3,332 |
Outage episodes by size in 2021: 73 reached 100+ customers, 17 reached 1,000+ customers, 1 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 Flathead County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Flathead Electric Coop Inc | 2021 | 11.2 hrs | 2.62 | 2.7 hrs | 1.97 |
| Lincoln Electric Coop, Inc | 2018 | 18.7 hrs | - | 3.0 hrs | - |
| Glacier Electric Coop, Inc | - | - | - | - | - |
| 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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 65,575 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. Flathead County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Flathead County, MT annual power outage report, 2021, 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/2021/montana/flathead-county