County annual report · FIPS 30075
2023 Powder River County, MT Power Outage Report
In 2023, customers in Powder River County, MT went without power for an average of 0.7 hours, a total of 414 customer-hours (Montana average 1.8 hours). That ranks 40th worst of 50 Montana counties and 2764th 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 Powder River 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 | September 9, 2023 22:15 | September 10, 2023 02:30 | 4h 15m | 30 | 98 |
| 2 | November 9, 2023 17:15 | November 9, 2023 18:45 | 1h 30m | 29 | 37 |
| 3 | August 25, 2023 23:15 | August 26, 2023 04:15 | 5h | 27 | 64 |
| 4 | May 24, 2023 05:45 | May 24, 2023 07:30 | 1h 45m | 22 | 39 |
| 5 | May 26, 2023 01:30 | May 26, 2023 05:00 | 3h 30m | 22 | 77 |
| 6 | June 24, 2023 00:30 | June 24, 2023 01:15 | 45m | 22 | 17 |
| 7 | June 20, 2023 19:15 | June 20, 2023 19:30 | 15m | 8 | 2 |
| 8 | September 4, 2023 06:45 | September 4, 2023 10:15 | 3h 30m | 8 | 28 |
| 9 | September 4, 2023 20:00 | September 4, 2023 22:45 | 2h 45m | 8 | 22 |
| 10 | September 7, 2023 21:45 | September 7, 2023 23:15 | 1h 30m | 8 | 12 |
Outage episodes by size in 2023: 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 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2023 | 66 min | 0.77 | 64 min | 0.74 |
| Powder River Energy Corp | 2023 | 3.4 hrs | 1.40 | 3.4 hrs | 1.40 |
| 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 2023; 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, 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/powder-river-county