County annual report · FIPS 30013
2022 Cascade County, MT Power Outage Report
In 2022, customers in Cascade County, MT went without power for an average of 4.2 hours, a total of 163K customer-hours (Montana average 3.5 hours). That ranks 25th worst of 50 Montana counties and 1613th 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 Cascade 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 | September 9, 2022 03:30 | September 9, 2022 07:00 | 3h 30m | 5,209 | 6,222 |
| 2 | June 28, 2022 15:00 | June 28, 2022 19:00 | 4h | 4,216 | 8,419 |
| 3 | June 15, 2022 04:00 | June 15, 2022 07:45 | 3h 45m | 3,899 | 14K |
| 4 | April 26, 2022 11:30 | April 26, 2022 21:45 | 10h 15m | 3,415 | 5,989 |
| 5 | July 15, 2022 12:45 | July 15, 2022 16:15 | 3h 30m | 2,841 | 3,325 |
| 6 | October 23, 2022 07:45 | October 24, 2022 10:30 | 1d 2h | 2,457 | 13K |
| 7 | November 5, 2022 10:45 | November 6, 2022 04:30 | 17h 45m | 2,225 | 15K |
| 8 | September 14, 2022 05:15 | September 14, 2022 06:30 | 1h 15m | 2,174 | 2,666 |
| 9 | August 24, 2022 07:30 | August 24, 2022 22:30 | 15h | 1,755 | 5,763 |
| 10 | February 7, 2022 14:15 | February 8, 2022 03:00 | 12h 45m | 1,591 | 2,253 |
Outage episodes by size in 2022: 74 reached 100+ customers, 21 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 Cascade 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 | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Sun River 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 ÷ 39,166 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. Cascade County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Cascade 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/cascade-county