County annual report · FIPS 30001
2023 Beaverhead County, MT Power Outage Report
In 2023, customers in Beaverhead County, MT went without power for an average of 6.1 hours, a total of 22K customer-hours (Montana average 1.8 hours). That ranks 7th worst of 50 Montana counties and 1268th of 2,977 nationally.
Compared with MT, the US and 2022
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Beaverhead County, 2023
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 8, 2023 03:00 | August 8, 2023 05:15 | 2h 15m | 6,180 | 7,361 |
| 2 | August 8, 2023 16:45 | August 8, 2023 18:30 | 1h 45m | 2,551 | 2,441 |
| 3 | September 12, 2023 07:00 | September 12, 2023 11:15 | 4h 15m | 2,551 | 5,874 |
| 4 | July 1, 2023 21:30 | July 2, 2023 07:15 | 9h 45m | 745 | 3,739 |
| 5 | February 20, 2023 15:15 | February 20, 2023 19:00 | 3h 45m | 450 | 1,098 |
| 6 | September 6, 2023 16:45 | September 6, 2023 20:00 | 3h 15m | 146 | 409 |
| 7 | March 28, 2023 14:45 | March 28, 2023 20:15 | 5h 30m | 67 | 193 |
| 8 | September 18, 2023 19:30 | September 18, 2023 21:15 | 1h 45m | 63 | 70 |
| 9 | December 13, 2023 17:00 | December 13, 2023 21:30 | 4h 30m | 39 | 176 |
| 10 | September 4, 2023 08:45 | September 4, 2023 12:00 | 3h 15m | 37 | 84 |
Outage episodes by size in 2023: 6 reached 100+ customers, 3 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 2023, 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) | 2023 | 1.7 hrs | 0.93 | 1.7 hrs | 0.93 |
| 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 2023; 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, 2023, 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/2023/montana/beaverhead-county