County annual report · FIPS 30075
2025 Powder River County, MT Power Outage Report
In 2025, customers in Powder River County, MT went without power for an average of 1.3 hours, a total of 757 customer-hours (Montana average 6.8 hours). That ranks 42nd worst of 51 Montana counties and 2679th 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 Powder River 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 | November 13, 2025 19:45 | November 14, 2025 00:15 | 4h 30m | 59 | 241 |
| 2 | October 2, 2025 17:00 | October 2, 2025 18:15 | 1h 15m | 30 | 38 |
| 3 | November 14, 2025 01:00 | November 14, 2025 02:00 | 1h | 30 | 25 |
| 4 | July 13, 2025 15:30 | July 14, 2025 02:30 | 11h | 29 | 254 |
| 5 | June 12, 2025 00:45 | June 12, 2025 03:45 | 3h | 22 | 66 |
| 6 | December 4, 2025 18:15 | December 4, 2025 20:30 | 2h 15m | 22 | 50 |
| 7 | July 3, 2025 05:45 | July 3, 2025 12:00 | 6h 15m | 12 | 75 |
| 8 | August 6, 2025 14:45 | August 6, 2025 16:15 | 1h 30m | 6 | 9 |
| 9 | December 1, 2025 19:30 | December 1, 2025 20:00 | 30m | 1 | 1 |
Outage episodes by size in 2025: 0 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 Powder River 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2024 | 40 min | 0.70 | 40 min | 0.70 |
| Powder River Energy Corp | 2024 | 8.3 hrs | 2.88 | 4.9 hrs | 2.24 |
| Tongue River Electric Coop Inc | - | - | - | - | - |
| Southeast 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 ÷ 583 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. Powder River County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Powder River 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/powder-river-county