County annual report · FIPS 30077
2024 Powell County, MT Power Outage Report
In 2024, customers in Powell County, MT went without power for an average of 12.8 hours, a total of 58K customer-hours (Montana average 8.5 hours). That ranks 9th worst of 51 Montana counties and 752nd 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 Powell 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 25, 2024 01:15 | July 28, 2024 08:45 | 3d 7h | 2,993 | 28K |
| 2 | May 28, 2024 16:30 | May 30, 2024 00:30 | 1d 8h | 572 | 1,108 |
| 3 | February 19, 2024 17:45 | February 19, 2024 22:30 | 4h 45m | 545 | 444 |
| 4 | July 23, 2024 02:00 | July 23, 2024 07:45 | 5h 45m | 472 | 453 |
| 5 | June 26, 2024 16:15 | June 27, 2024 21:45 | 1d 5h | 451 | 1,305 |
| 6 | May 23, 2024 09:45 | May 24, 2024 00:15 | 14h 30m | 411 | 3,289 |
| 7 | July 17, 2024 05:15 | July 17, 2024 11:45 | 6h 30m | 273 | 1,772 |
| 8 | September 17, 2024 14:45 | September 18, 2024 00:15 | 9h 30m | 192 | 1,740 |
| 9 | October 5, 2024 01:15 | October 10, 2024 17:45 | 5d 16h | 192 | 4,665 |
| 10 | August 23, 2024 21:00 | August 24, 2024 22:30 | 1d 1h | 173 | 3,369 |
Outage episodes by size in 2024: 14 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 Powell 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 |
| Missoula Electric Coop, Inc | 2024 | 26.8 hrs | 3.59 | 8.4 hrs | 2.19 |
| Bonneville Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
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 ÷ 4,506 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. Powell County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Powell 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/powell-county