County annual report · FIPS 30087
2022 Rosebud County, MT Power Outage Report
In 2022, customers in Rosebud County, MT went without power for an average of 2.1 hours, a total of 9,847 customer-hours (Montana average 3.5 hours). That ranks 38th worst of 50 Montana counties and 2247th 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 Rosebud 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 23, 2022 18:30 | April 24, 2022 02:00 | 7h 30m | 1,163 | 1,749 |
| 2 | May 23, 2022 09:30 | May 23, 2022 10:30 | 1h | 1,162 | 1,161 |
| 3 | April 26, 2022 15:15 | April 26, 2022 16:00 | 45m | 1,133 | 844 |
| 4 | April 5, 2022 19:30 | April 5, 2022 20:00 | 30m | 569 | 285 |
| 5 | June 18, 2022 05:00 | June 18, 2022 06:15 | 1h 15m | 403 | 504 |
| 6 | June 15, 2022 12:30 | June 15, 2022 12:45 | 15m | 277 | 69 |
| 7 | March 26, 2022 09:45 | March 26, 2022 15:30 | 5h 45m | 242 | 1,166 |
| 8 | July 4, 2022 02:30 | July 4, 2022 05:45 | 3h 15m | 167 | 543 |
| 9 | October 4, 2022 21:15 | October 4, 2022 22:45 | 1h 30m | 167 | 251 |
| 10 | December 20, 2022 22:00 | December 21, 2022 13:15 | 15h 15m | 167 | 714 |
Outage episodes by size in 2022: 11 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 Rosebud 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 |
| Mid-Yellowstone Elec Coop, Inc | 2018 | 4.5 hrs | 3.82 | 4.5 hrs | 3.82 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| McCone Electric Coop Inc | - | - | - | - | - |
| Tongue 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 ÷ 4,647 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. Rosebud County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Rosebud 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/rosebud-county