County annual report · FIPS 30079
2025 Prairie County, MT Power Outage Report
In 2025, customers in Prairie County, MT went without power for an average of 8.1 hours, a total of 6,141 customer-hours (Montana average 6.8 hours). That ranks 24th worst of 51 Montana counties and 1006th 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 Prairie County, 2025
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 20, 2025 00:45 | July 21, 2025 01:45 | 1d 1h | 477 | 1,199 |
| 2 | April 3, 2025 22:15 | April 3, 2025 23:45 | 1h 30m | 468 | 702 |
| 3 | May 13, 2025 03:45 | May 13, 2025 06:15 | 2h 30m | 467 | 980 |
| 4 | July 28, 2025 07:15 | July 28, 2025 13:45 | 6h 30m | 467 | 1,993 |
| 5 | June 18, 2025 16:45 | June 18, 2025 19:00 | 2h 15m | 466 | 891 |
| 6 | July 24, 2025 16:00 | July 24, 2025 21:15 | 5h 15m | 73 | 322 |
| 7 | December 22, 2025 19:30 | December 23, 2025 01:00 | 5h 30m | 7 | 39 |
| 8 | June 20, 2025 16:30 | June 20, 2025 18:45 | 2h 15m | 6 | 14 |
| 9 | October 10, 2025 19:15 | October 10, 2025 19:45 | 30m | 6 | 3 |
Outage episodes by size in 2025: 5 reached 100+ customers, 0 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 Prairie 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 |
| 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 ÷ 758 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. Prairie County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Prairie 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/prairie-county