County annual report · FIPS 30061
2020 Mineral County, MT Power Outage Report
In 2020, customers in Mineral County, MT went without power for an average of 2.9 hours, a total of 7,140 customer-hours (Montana average 5.6 hours). That ranks 36th worst of 50 Montana counties and 1906th 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 Mineral 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 | January 13, 2020 02:45 | January 13, 2020 05:30 | 2h 45m | 300 | 601 |
| 2 | March 14, 2020 08:30 | March 14, 2020 09:00 | 30m | 300 | 150 |
| 3 | September 14, 2020 09:00 | September 14, 2020 13:15 | 4h 15m | 300 | 290 |
| 4 | September 17, 2020 22:45 | September 18, 2020 00:45 | 2h | 300 | 377 |
| 5 | December 22, 2020 12:30 | December 22, 2020 13:30 | 1h | 300 | 162 |
| 6 | February 24, 2020 19:30 | February 24, 2020 21:15 | 1h 45m | 226 | 340 |
| 7 | October 31, 2020 21:45 | November 1, 2020 03:30 | 5h 45m | 219 | 611 |
| 8 | January 4, 2020 19:30 | January 4, 2020 23:45 | 4h 15m | 175 | 530 |
| 9 | October 24, 2020 10:30 | October 25, 2020 21:00 | 1d 10h | 62 | 1,200 |
| 10 | May 18, 2020 01:45 | May 18, 2020 04:15 | 2h 30m | 52 | 92 |
Outage episodes by size in 2020: 8 reached 100+ customers, 0 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 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 |
| 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 76% of Montana's customers in 2020; 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, 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/mineral-county