County annual report · FIPS 30001
2025 Beaverhead County, MT Power Outage Report
In 2025, customers in Beaverhead County, MT went without power for an average of 1.7 hours, a total of 6,110 customer-hours (Montana average 6.8 hours). That ranks 40th worst of 51 Montana counties and 2540th of 3,000 nationally.
Compared with MT, the US and 2024
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Beaverhead County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 14, 2025 10:45 | May 14, 2025 22:15 | 11h 30m | 1,107 | 2,164 |
| 2 | January 22, 2025 14:30 | January 22, 2025 18:45 | 4h 15m | 473 | 950 |
| 3 | January 10, 2025 18:15 | January 10, 2025 18:30 | 15m | 472 | 118 |
| 4 | February 26, 2025 01:45 | February 26, 2025 02:00 | 15m | 384 | 96 |
| 5 | June 9, 2025 03:00 | June 9, 2025 07:00 | 4h | 161 | 85 |
| 6 | August 27, 2025 15:15 | August 27, 2025 17:45 | 2h 30m | 160 | 398 |
| 7 | August 13, 2025 23:45 | August 14, 2025 04:45 | 5h | 159 | 795 |
| 8 | December 30, 2025 15:15 | December 30, 2025 17:45 | 2h 30m | 155 | 323 |
| 9 | February 20, 2025 14:45 | February 20, 2025 18:45 | 4h | 62 | 246 |
| 10 | April 3, 2025 15:15 | April 3, 2025 16:15 | 1h | 59 | 59 |
Outage episodes by size in 2025: 8 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 Beaverhead County reported on EIA Form 861 for 2025, 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 |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante 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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,612 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. Beaverhead County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Beaverhead County, MT annual power outage report, 2025, 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/2025/montana/beaverhead-county