County annual report · FIPS 30105
2024 Valley County, MT Power Outage Report
In 2024, customers in Valley County, MT went without power for an average of 4.8 hours, a total of 19K customer-hours (Montana average 8.5 hours). That ranks 28th worst of 51 Montana counties and 1660th of 2,990 nationally.
Compared with MT, the US and 2023
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Valley County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 17, 2024 17:15 | July 17, 2024 18:45 | 1h 30m | 2,767 | 3,460 |
| 2 | April 11, 2024 05:15 | April 11, 2024 06:15 | 1h | 1,175 | 1,175 |
| 3 | March 31, 2024 21:45 | April 1, 2024 01:30 | 3h 45m | 1,162 | 4,200 |
| 4 | January 13, 2024 07:15 | January 13, 2024 08:15 | 1h | 1,045 | 736 |
| 5 | October 5, 2024 04:45 | October 5, 2024 16:15 | 11h 30m | 596 | 2,695 |
| 6 | June 20, 2024 19:15 | June 20, 2024 23:45 | 4h 30m | 533 | 814 |
| 7 | August 21, 2024 04:15 | August 21, 2024 07:00 | 2h 45m | 472 | 1,298 |
| 8 | December 19, 2024 05:00 | December 19, 2024 08:45 | 3h 45m | 468 | 1,755 |
| 9 | January 26, 2024 21:00 | January 29, 2024 15:30 | 2d 18h | 337 | 654 |
| 10 | April 10, 2024 22:45 | April 11, 2024 00:30 | 1h 45m | 270 | 471 |
Outage episodes by size in 2024: 10 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 Valley County reported on EIA Form 861 for 2024, 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) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| NorVal Electric Cooperative, Inc | - | - | - | - | - |
| Big Flat Electric Coop Inc | - | - | - | - | - |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,912 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. Valley County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Valley County, MT annual power outage report, 2024, 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/2024/montana/valley-county