County annual report · FIPS 30077
2022 Powell County, MT Power Outage Report
In 2022, customers in Powell County, MT went without power for an average of 1.5 hours, a total of 6,665 customer-hours (Montana average 3.5 hours). That ranks 42nd worst of 50 Montana counties and 2513th of 2,976 nationally.
Compared with MT, the US and 2021
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Powell County, 2022
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 20, 2022 18:30 | May 20, 2022 19:15 | 45m | 793 | 199 |
| 2 | September 22, 2022 15:00 | September 22, 2022 23:00 | 8h | 439 | 2,570 |
| 3 | February 22, 2022 15:15 | February 22, 2022 18:00 | 2h 45m | 102 | 219 |
| 4 | May 20, 2022 05:30 | May 20, 2022 10:45 | 5h 15m | 89 | 416 |
| 5 | October 23, 2022 12:45 | October 23, 2022 20:00 | 7h 15m | 87 | 437 |
| 6 | April 18, 2022 18:45 | April 18, 2022 20:45 | 2h | 79 | 139 |
| 7 | September 7, 2022 22:30 | September 8, 2022 08:00 | 9h 30m | 68 | 479 |
| 8 | January 18, 2022 17:15 | January 19, 2022 01:15 | 8h | 50 | 397 |
| 9 | August 23, 2022 22:30 | August 24, 2022 05:45 | 7h 15m | 46 | 90 |
| 10 | March 3, 2022 19:30 | March 4, 2022 00:45 | 5h 15m | 41 | 25 |
Outage episodes by size in 2022: 3 reached 100+ customers, 0 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 2022, 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) | 2022 | 2.2 hrs | 1.14 | 2.0 hrs | 1.09 |
| Missoula Electric Coop, Inc | 2022 | 4.3 hrs | 1.44 | 4.3 hrs | 1.44 |
| 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 76% of Montana's customers in 2022; 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, 2022, 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/2022/montana/powell-county