County annual report · FIPS 30087
2025 Rosebud County, MT Power Outage Report
In 2025, customers in Rosebud County, MT went without power for an average of 2.8 hours, a total of 13K customer-hours (Montana average 6.8 hours). That ranks 35th worst of 51 Montana counties and 2124th of 3,000 nationally.
Compared with MT, the US and 2024
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Rosebud County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 17, 2025 22:15 | December 20, 2025 00:00 | 2d 1h | 1,172 | 5,983 |
| 2 | September 2, 2025 12:15 | September 2, 2025 14:15 | 2h | 1,141 | 1,921 |
| 3 | June 27, 2025 11:00 | June 27, 2025 11:15 | 15m | 1,060 | 265 |
| 4 | May 23, 2025 06:45 | May 23, 2025 09:00 | 2h 15m | 277 | 542 |
| 5 | June 16, 2025 04:45 | June 16, 2025 09:30 | 4h 45m | 173 | 822 |
| 6 | December 9, 2025 16:45 | December 9, 2025 19:15 | 2h 30m | 92 | 191 |
| 7 | July 18, 2025 03:15 | July 18, 2025 11:15 | 8h | 82 | 371 |
| 8 | July 28, 2025 22:15 | July 30, 2025 04:45 | 1d 6h | 82 | 616 |
| 9 | August 19, 2025 05:00 | August 19, 2025 07:45 | 2h 45m | 82 | 226 |
| 10 | September 5, 2025 08:15 | September 5, 2025 10:15 | 2h | 82 | 164 |
Outage episodes by size in 2025: 5 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 2025, 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | 2024 | 2.9 hrs | 1.26 | 2.1 hrs | 1.10 |
| NorthWestern Energy LLC - (MT) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| Mid-Yellowstone Elec Coop, Inc | 2018 | 4.5 hrs | 3.82 | 4.5 hrs | 3.82 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| 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 n/a of Montana's customers in 2025; 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, 2025, 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/2025/montana/rosebud-county