County annual report · FIPS 30081
2023 Ravalli County, MT Power Outage Report
In 2023, customers in Ravalli County, MT went without power for an average of 1.7 hours, a total of 42K customer-hours (Montana average 1.8 hours). That ranks 27th worst of 50 Montana counties and 2414th 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 Ravalli 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 | November 16, 2023 03:15 | November 16, 2023 06:45 | 3h 30m | 2,667 | 8,467 |
| 2 | August 23, 2023 20:30 | August 24, 2023 19:15 | 22h 45m | 1,586 | 2,620 |
| 3 | May 2, 2023 23:15 | May 3, 2023 01:30 | 2h 15m | 1,582 | 3,560 |
| 4 | August 29, 2023 13:45 | August 30, 2023 07:00 | 17h 15m | 1,165 | 5,505 |
| 5 | September 28, 2023 06:00 | September 28, 2023 10:30 | 4h 30m | 736 | 2,542 |
| 6 | January 27, 2023 20:15 | January 27, 2023 22:00 | 1h 45m | 553 | 967 |
| 7 | February 24, 2023 03:00 | February 24, 2023 04:45 | 1h 45m | 552 | 830 |
| 8 | October 3, 2023 06:45 | October 3, 2023 15:45 | 9h | 516 | 4,422 |
| 9 | August 25, 2023 22:00 | August 26, 2023 02:30 | 4h 30m | 498 | 872 |
| 10 | November 12, 2023 00:30 | November 12, 2023 07:00 | 6h 30m | 478 | 1,213 |
Outage episodes by size in 2023: 24 reached 100+ customers, 4 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 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 |
| Missoula Electric Coop, Inc | 2023 | 2.8 hrs | 1.19 | 2.8 hrs | 1.19 |
| 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 n/a of Montana's customers in 2023; 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, 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/ravalli-county