County annual report · FIPS 30065
2020 Musselshell County, MT Power Outage Report
In 2020, customers in Musselshell County, MT went without power for an average of 4.1 hours, a total of 9,670 customer-hours (Montana average 5.6 hours). That ranks 29th worst of 50 Montana counties and 1589th of 3,019 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Musselshell County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 16, 2020 17:00 | November 17, 2020 00:45 | 7h 45m | 472 | 3,321 |
| 2 | May 20, 2020 17:30 | May 20, 2020 21:00 | 3h 30m | 401 | 1,304 |
| 3 | June 7, 2020 06:15 | June 7, 2020 15:30 | 9h 15m | 182 | 887 |
| 4 | August 6, 2020 05:45 | August 6, 2020 13:00 | 7h 15m | 108 | 303 |
| 5 | March 5, 2020 15:45 | March 6, 2020 06:15 | 14h 30m | 102 | 768 |
| 6 | June 11, 2020 16:15 | June 11, 2020 18:45 | 2h 30m | 91 | 228 |
| 7 | October 8, 2020 16:15 | October 8, 2020 22:30 | 6h 15m | 84 | 381 |
| 8 | April 7, 2020 20:45 | April 7, 2020 23:15 | 2h 30m | 68 | 159 |
| 9 | June 16, 2020 23:15 | June 17, 2020 02:00 | 2h 45m | 63 | 133 |
| 10 | April 4, 2020 04:45 | April 4, 2020 06:45 | 2h | 60 | 120 |
Outage episodes by size in 2020: 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 Musselshell County reported on EIA Form 861 for 2020, 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) | 2020 | 2.8 hrs | 1.13 | 2.0 hrs | 1.02 |
| 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 76% of Montana's customers in 2020; 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, 2020, 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/2020/montana/musselshell-county