County annual report · FIPS 30029
2015 Flathead County, MT Power Outage Report
In 2015, customers in Flathead County, MT went without power for an average of 3.5 hours, a total of 229K customer-hours (Montana average 2.3 hours). That ranks 1st worst of 5 Montana counties and 804th of 2,484 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Flathead County, 2015
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 4, 2015 03:45 | January 4, 2015 08:30 | 4h 45m | 6,376 | 14K |
| 2 | November 18, 2015 00:15 | November 18, 2015 15:00 | 14h 45m | 5,971 | 39K |
| 3 | November 18, 2015 15:45 | November 21, 2015 05:00 | 2d 13h | 4,528 | 71K |
| 4 | February 14, 2015 01:30 | February 14, 2015 03:00 | 1h 30m | 3,873 | 3,990 |
| 5 | June 3, 2015 17:00 | June 3, 2015 17:30 | 30m | 2,933 | 734 |
| 6 | June 1, 2015 21:30 | June 1, 2015 23:15 | 1h 45m | 2,929 | 2,929 |
| 7 | July 7, 2015 15:30 | July 7, 2015 17:15 | 1h 45m | 2,704 | 678 |
| 8 | February 14, 2015 04:45 | February 14, 2015 05:45 | 1h | 2,698 | 675 |
| 9 | June 15, 2015 17:00 | June 15, 2015 18:30 | 1h 30m | 2,276 | 1,766 |
| 10 | October 6, 2015 16:15 | October 7, 2015 03:00 | 10h 45m | 2,074 | 567 |
Outage episodes by size in 2015: 92 reached 100+ customers, 22 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 Flathead County reported on EIA Form 861 for 2015, 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 | 2015 | 7.6 hrs | 1.87 | 3.1 hrs | 1.50 |
| Lincoln Electric Coop, Inc | 2015 | 6.2 hrs | - | 6.2 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 n/a of Montana's customers in 2015; 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, 2015, 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/2015/montana/flathead-county