County annual report · FIPS 30089
2019 Sanders County, MT Power Outage Report
In 2019, customers in Sanders County, MT went without power for an average of 2.9 hours, a total of 21K customer-hours (Montana average 0.6 hours). That ranks 6th worst of 38 Montana counties and 1694th of 2,945 nationally.
Compared with MT, the US and 2018
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Sanders County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 20, 2019 05:15 | September 20, 2019 07:00 | 1h 45m | 1,366 | 2,053 |
| 2 | February 13, 2019 13:15 | February 13, 2019 22:45 | 9h 30m | 673 | 3,243 |
| 3 | December 13, 2019 08:00 | December 13, 2019 15:30 | 7h 30m | 551 | 1,553 |
| 4 | July 15, 2019 18:45 | July 15, 2019 20:45 | 2h | 460 | 593 |
| 5 | January 14, 2019 13:15 | January 14, 2019 15:15 | 2h | 407 | 623 |
| 6 | April 4, 2019 20:45 | April 5, 2019 14:45 | 18h | 336 | 324 |
| 7 | May 30, 2019 01:00 | May 30, 2019 03:30 | 2h 30m | 336 | 442 |
| 8 | November 28, 2019 00:00 | November 28, 2019 04:45 | 4h 45m | 278 | 385 |
| 9 | July 24, 2019 03:00 | July 25, 2019 17:45 | 1d 14h | 223 | 1,505 |
| 10 | November 27, 2019 21:15 | November 27, 2019 22:30 | 1h 15m | 214 | 58 |
Outage episodes by size in 2019: 36 reached 100+ customers, 1 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 2019, 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) | 2018 | 1.7 hrs | 1.08 | 1.7 hrs | 1.08 |
| Avista Corp | 2018 | 2.6 hrs | 0.89 | 2.2 hrs | 0.81 |
| Flathead Electric Coop Inc | 2018 | 2.8 hrs | 1.56 | 2.8 hrs | 1.56 |
| 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 75% of Montana's customers in 2019; 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, 2019, 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/2019/montana/sanders-county