County annual report · FIPS 30087
2023 Rosebud County, MT Power Outage Report
In 2023, customers in Rosebud County, MT went without power for an average of 2.4 hours, a total of 11K customer-hours (Montana average 1.8 hours). That ranks 18th worst of 50 Montana counties and 2161st of 2,977 nationally.
Compared with MT, the US and 2022
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Rosebud County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 30, 2023 15:45 | January 30, 2023 21:15 | 5h 30m | 1,162 | 6,111 |
| 2 | August 17, 2023 11:00 | August 17, 2023 11:15 | 15m | 1,125 | 281 |
| 3 | September 1, 2023 14:30 | September 1, 2023 14:45 | 15m | 1,120 | 280 |
| 4 | May 12, 2023 11:15 | May 12, 2023 11:30 | 15m | 1,067 | 267 |
| 5 | August 10, 2023 08:00 | August 10, 2023 09:15 | 1h 15m | 759 | 948 |
| 6 | January 30, 2023 22:00 | January 31, 2023 01:15 | 3h 15m | 255 | 775 |
| 7 | April 6, 2023 20:30 | April 6, 2023 22:45 | 2h 15m | 168 | 110 |
| 8 | June 28, 2023 00:00 | June 28, 2023 01:15 | 1h 15m | 128 | 159 |
| 9 | May 12, 2023 18:30 | May 12, 2023 18:45 | 15m | 107 | 27 |
| 10 | April 13, 2023 13:00 | April 13, 2023 18:00 | 5h | 82 | 410 |
Outage episodes by size in 2023: 9 reached 100+ customers, 4 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 2023, 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) | 2023 | 1.7 hrs | 0.93 | 1.7 hrs | 0.93 |
| 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 n/a of Montana's customers in 2023; 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, 2023, 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/2023/montana/rosebud-county