County annual report · FIPS 30029
2018 Flathead County, MT Power Outage Report
In 2018, customers in Flathead County, MT went without power for an average of 2.2 hours, a total of 147K customer-hours (Montana average 1.9 hours). That ranks 6th worst of 20 Montana counties and 1751st 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 Flathead 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 | October 31, 2018 18:15 | October 31, 2018 22:30 | 4h 15m | 12,775 | 8,053 |
| 2 | October 15, 2018 18:30 | October 16, 2018 00:00 | 5h 30m | 6,684 | 3,073 |
| 3 | May 16, 2018 23:30 | May 17, 2018 04:45 | 5h 15m | 5,882 | 12K |
| 4 | June 3, 2018 14:15 | June 3, 2018 19:30 | 5h 15m | 2,608 | 7,128 |
| 5 | January 19, 2018 08:00 | January 19, 2018 14:45 | 6h 45m | 2,389 | 13K |
| 6 | May 7, 2018 20:30 | May 7, 2018 22:00 | 1h 30m | 1,824 | 926 |
| 7 | February 8, 2018 22:15 | February 9, 2018 17:00 | 18h 45m | 1,739 | 7,206 |
| 8 | April 21, 2018 19:15 | April 22, 2018 01:00 | 5h 45m | 1,658 | 4,969 |
| 9 | May 22, 2018 07:45 | May 22, 2018 11:45 | 4h | 1,521 | 5,705 |
| 10 | April 8, 2018 02:15 | April 8, 2018 08:30 | 6h 15m | 1,458 | 2,053 |
Outage episodes by size in 2018: 84 reached 100+ customers, 21 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 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 |
|---|---|---|---|---|---|
| Flathead Electric Coop Inc | 2018 | 2.8 hrs | 1.56 | 2.8 hrs | 1.56 |
| 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 16% of Montana's customers in 2018; 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, 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/flathead-county