County annual report · FIPS 30093
2024 Silver Bow County, MT Power Outage Report
In 2024, customers in Silver Bow County, MT went without power for an average of 1.5 hours, a total of 35K customer-hours (Montana average 8.5 hours). That ranks 42nd worst of 51 Montana counties and 2577th of 2,990 nationally.
Compared with MT, the US and 2023
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Silver Bow County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 31, 2024 10:45 | December 31, 2024 13:45 | 3h | 2,049 | 2,617 |
| 2 | May 17, 2024 17:45 | May 18, 2024 21:15 | 1d 3h | 1,825 | 4,956 |
| 3 | July 1, 2024 05:00 | July 1, 2024 09:00 | 4h | 724 | 1,909 |
| 4 | August 11, 2024 02:15 | August 11, 2024 11:00 | 8h 45m | 689 | 914 |
| 5 | October 17, 2024 22:45 | October 18, 2024 00:30 | 1h 45m | 687 | 1,066 |
| 6 | December 5, 2024 18:15 | December 5, 2024 19:15 | 1h | 684 | 684 |
| 7 | July 20, 2024 13:45 | July 20, 2024 18:15 | 4h 30m | 528 | 1,962 |
| 8 | August 13, 2024 02:15 | August 13, 2024 11:45 | 9h 30m | 430 | 1,051 |
| 9 | October 24, 2024 22:00 | October 25, 2024 00:30 | 2h 30m | 430 | 909 |
| 10 | July 24, 2024 15:00 | July 24, 2024 22:15 | 7h 15m | 429 | 1,445 |
Outage episodes by size in 2024: 36 reached 100+ customers, 2 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 Silver Bow County reported on EIA Form 861 for 2024, 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) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| Bonneville Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante 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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 24,074 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. Silver Bow County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Silver Bow County, MT annual power outage report, 2024, 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/2024/montana/silver-bow-county