County annual report · FIPS 30105
2022 Valley County, MT Power Outage Report
In 2022, customers in Valley County, MT went without power for an average of 2.1 hours, a total of 8,395 customer-hours (Montana average 3.5 hours). That ranks 36th worst of 50 Montana counties and 2237th 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 Valley 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 | April 5, 2022 18:15 | April 6, 2022 06:30 | 12h 15m | 1,545 | 3,996 |
| 2 | June 6, 2022 14:45 | June 6, 2022 17:00 | 2h 15m | 1,230 | 1,984 |
| 3 | July 11, 2022 23:15 | July 12, 2022 01:45 | 2h 30m | 521 | 683 |
| 4 | June 15, 2022 16:45 | June 15, 2022 19:45 | 3h | 271 | 608 |
| 5 | June 17, 2022 00:30 | June 17, 2022 02:45 | 2h 15m | 68 | 149 |
| 6 | July 19, 2022 14:45 | July 19, 2022 17:30 | 2h 45m | 62 | 171 |
| 7 | July 10, 2022 03:30 | July 10, 2022 17:15 | 13h 45m | 59 | 245 |
| 8 | July 18, 2022 23:30 | July 19, 2022 06:00 | 6h 30m | 29 | 73 |
| 9 | July 13, 2022 13:30 | July 13, 2022 17:45 | 4h 15m | 20 | 54 |
| 10 | February 18, 2022 10:45 | February 18, 2022 12:00 | 1h 15m | 16 | 7 |
Outage episodes by size in 2022: 4 reached 100+ customers, 2 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 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 |
| 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 76% of Montana's customers in 2022; 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, 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/valley-county