County annual report · FIPS 30065
2023 Musselshell County, MT Power Outage Report
In 2023, customers in Musselshell County, MT went without power for an average of 10.6 hours, a total of 25K customer-hours (Montana average 1.8 hours). That ranks 4th worst of 50 Montana counties and 801st 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 Musselshell 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 | April 19, 2023 13:00 | April 24, 2023 23:45 | 5d 10h | 466 | 18K |
| 2 | May 27, 2023 03:30 | May 27, 2023 11:15 | 7h 45m | 388 | 2,773 |
| 3 | January 27, 2023 03:15 | January 27, 2023 12:00 | 8h 45m | 102 | 741 |
| 4 | January 12, 2023 16:30 | January 12, 2023 19:45 | 3h 15m | 80 | 260 |
| 5 | April 13, 2023 12:45 | April 13, 2023 18:00 | 5h 15m | 80 | 321 |
| 6 | May 9, 2023 16:15 | May 9, 2023 17:30 | 1h 15m | 44 | 55 |
| 7 | June 24, 2023 01:45 | June 26, 2023 03:00 | 2d 1h | 39 | 956 |
| 8 | June 9, 2023 14:15 | June 9, 2023 15:45 | 1h 30m | 36 | 54 |
| 9 | June 11, 2023 13:45 | June 15, 2023 23:15 | 4d 9h | 36 | 1,185 |
| 10 | October 17, 2023 21:00 | October 18, 2023 16:15 | 19h 15m | 34 | 105 |
Outage episodes by size in 2023: 3 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 Musselshell 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 |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Yellowstone Valley Elec Co-op | - | - | - | - | - |
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 ÷ 2,362 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. Musselshell County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Musselshell 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/musselshell-county