County annual report · FIPS 30061
2023 Mineral County, MT Power Outage Report
In 2023, customers in Mineral County, MT went without power for an average of 3.8 hours, a total of 9,236 customer-hours (Montana average 1.8 hours). That ranks 13th worst of 50 Montana counties and 1722nd 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 Mineral 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 | August 2, 2023 13:15 | August 2, 2023 20:15 | 7h | 1,929 | 3,070 |
| 2 | October 17, 2023 16:15 | October 17, 2023 22:30 | 6h 15m | 319 | 1,988 |
| 3 | August 30, 2023 00:30 | August 30, 2023 05:30 | 5h | 228 | 981 |
| 4 | September 13, 2023 17:00 | September 13, 2023 21:00 | 4h | 228 | 666 |
| 5 | December 6, 2023 08:30 | December 6, 2023 13:45 | 5h 15m | 202 | 905 |
| 6 | June 28, 2023 02:45 | June 28, 2023 05:15 | 2h 30m | 117 | 264 |
| 7 | October 27, 2023 16:00 | October 28, 2023 01:30 | 9h 30m | 84 | 333 |
| 8 | August 14, 2023 01:30 | August 14, 2023 02:45 | 1h 15m | 56 | 57 |
| 9 | October 4, 2023 15:00 | October 4, 2023 20:00 | 5h | 49 | 184 |
| 10 | January 3, 2023 20:15 | January 3, 2023 23:45 | 3h 30m | 30 | 95 |
Outage episodes by size in 2023: 6 reached 100+ customers, 1 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 Mineral 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 |
| Bonneville Power Administration | - | - | - | - | - |
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 ÷ 2,455 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. Mineral County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Mineral 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/mineral-county