County annual report · FIPS 30031
2020 Gallatin County, MT Power Outage Report
In 2020, customers in Gallatin County, MT went without power for an average of 3.1 hours, a total of 296K customer-hours (Montana average 5.6 hours). That ranks 35th worst of 50 Montana counties and 1856th of 3,019 nationally.
Compared with MT, the US and 2019
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Gallatin 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 | October 8, 2020 04:00 | October 8, 2020 13:45 | 9h 45m | 6,905 | 27K |
| 2 | June 15, 2020 14:00 | June 16, 2020 00:45 | 10h 45m | 5,864 | 8,810 |
| 3 | July 10, 2020 09:15 | July 15, 2020 22:00 | 5d 12h | 2,764 | 64K |
| 4 | June 4, 2020 07:15 | June 5, 2020 00:30 | 17h 15m | 2,717 | 6,695 |
| 5 | September 28, 2020 16:45 | September 28, 2020 20:30 | 3h 45m | 2,373 | 2,874 |
| 6 | October 9, 2020 15:00 | October 9, 2020 23:00 | 8h | 2,107 | 8,312 |
| 7 | October 26, 2020 06:15 | October 26, 2020 14:00 | 7h 45m | 1,824 | 14K |
| 8 | June 25, 2020 01:45 | June 26, 2020 03:30 | 1d 1h | 1,773 | 4,317 |
| 9 | October 8, 2020 15:45 | October 8, 2020 22:45 | 7h | 1,454 | 2,530 |
| 10 | November 6, 2020 16:15 | November 7, 2020 03:00 | 10h 45m | 1,417 | 1,532 |
Outage episodes by size in 2020: 80 reached 100+ customers, 12 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 Gallatin 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 |
| Fall River Rural Elec Coop Inc | 2020 | 70 min | 0.56 | 56 min | 0.47 |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante Electric Coop, Inc | - | - | - | - | - |
| Park 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 76% of Montana's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 96,603 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. Gallatin County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Gallatin 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/gallatin-county