County annual report · FIPS 30089
2022 Sanders County, MT Power Outage Report
In 2022, customers in Sanders County, MT went without power for an average of 6.8 hours, a total of 50K customer-hours (Montana average 3.5 hours). That ranks 17th worst of 50 Montana counties and 1076th of 2,976 nationally.
Compared with MT, the US and 2021
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Sanders County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 24, 2022 18:15 | August 25, 2022 00:30 | 6h 15m | 1,361 | 2,046 |
| 2 | April 13, 2022 14:45 | April 13, 2022 23:00 | 8h 15m | 1,360 | 2,424 |
| 3 | July 3, 2022 01:15 | July 3, 2022 05:00 | 3h 45m | 1,360 | 413 |
| 4 | August 21, 2022 22:45 | August 22, 2022 01:00 | 2h 15m | 1,189 | 2,675 |
| 5 | February 21, 2022 15:15 | February 21, 2022 18:30 | 3h 15m | 903 | 861 |
| 6 | April 4, 2022 22:00 | April 5, 2022 09:15 | 11h 15m | 839 | 3,627 |
| 7 | November 10, 2022 19:45 | November 11, 2022 00:15 | 4h 30m | 774 | 265 |
| 8 | June 1, 2022 18:15 | June 2, 2022 00:30 | 6h 15m | 757 | 1,993 |
| 9 | January 12, 2022 17:15 | January 12, 2022 22:30 | 5h 15m | 750 | 1,419 |
| 10 | January 6, 2022 19:45 | January 8, 2022 04:45 | 1d 9h | 738 | 5,539 |
Outage episodes by size in 2022: 43 reached 100+ customers, 4 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 Sanders County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2022 | 2.2 hrs | 1.14 | 2.0 hrs | 1.09 |
| Avista Corp | 2022 | 3.6 hrs | 1.15 | 2.5 hrs | 0.96 |
| Flathead Electric Coop Inc | 2022 | 11.5 hrs | 2.72 | 3.7 hrs | 1.82 |
| NorthWestern Energy | - | - | - | - | - |
| Northern Lights, 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 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,314 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. Sanders County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sanders County, MT annual power outage report, 2022, 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/2022/montana/sanders-county