County annual report · FIPS 30081
2020 Ravalli County, MT Power Outage Report
In 2020, customers in Ravalli County, MT went without power for an average of 2.9 hours, a total of 72K customer-hours (Montana average 5.6 hours). That ranks 37th worst of 50 Montana counties and 1915th 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 Ravalli 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 | September 7, 2020 17:45 | September 9, 2020 01:15 | 1d 7h | 5,966 | 23K |
| 2 | June 13, 2020 19:15 | June 14, 2020 11:15 | 16h | 1,909 | 8,503 |
| 3 | October 14, 2020 01:45 | October 14, 2020 10:15 | 8h 30m | 1,714 | 4,090 |
| 4 | April 21, 2020 19:15 | April 21, 2020 22:00 | 2h 45m | 1,248 | 1,739 |
| 5 | June 24, 2020 21:15 | June 25, 2020 00:30 | 3h 15m | 1,121 | 2,102 |
| 6 | September 20, 2020 23:45 | September 21, 2020 04:00 | 4h 15m | 1,043 | 1,648 |
| 7 | October 16, 2020 23:15 | October 18, 2020 22:30 | 1d 23h | 896 | 3,324 |
| 8 | July 2, 2020 03:15 | July 2, 2020 07:45 | 4h 30m | 811 | 1,939 |
| 9 | February 1, 2020 16:00 | February 3, 2020 05:30 | 1d 13h | 781 | 7,869 |
| 10 | March 30, 2020 02:45 | March 30, 2020 05:00 | 2h 15m | 715 | 1,609 |
Outage episodes by size in 2020: 25 reached 100+ customers, 6 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 Ravalli 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 |
| Missoula Electric Coop, Inc | 2020 | 6.0 hrs | 2.00 | 6.0 hrs | 2.00 |
| Ravalli County Elec Coop, Inc | 2018 | 4.2 hrs | 1.53 | 2.5 hrs | 1.41 |
| NorthWestern Energy | - | - | - | - | - |
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 ÷ 25,043 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. Ravalli County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Ravalli 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/ravalli-county