County annual report · FIPS 30061
2019 Mineral County, MT Power Outage Report
In 2019, customers in Mineral County, MT went without power for an average of 1.0 hours, a total of 2,453 customer-hours (Montana average 0.6 hours). That ranks 13th worst of 38 Montana counties and 2491st of 2,945 nationally.
Compared with MT, the US and 2018
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Mineral County, 2019
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 20, 2019 05:15 | September 20, 2019 07:00 | 1h 45m | 300 | 455 |
| 2 | May 25, 2019 07:15 | May 25, 2019 10:15 | 3h | 299 | 853 |
| 3 | April 23, 2019 03:15 | April 23, 2019 09:15 | 6h | 36 | 139 |
| 4 | May 16, 2019 16:00 | May 16, 2019 18:15 | 2h 15m | 36 | 43 |
| 5 | June 7, 2019 02:00 | June 7, 2019 03:45 | 1h 45m | 36 | 63 |
| 6 | July 19, 2019 15:30 | July 19, 2019 18:45 | 3h 15m | 36 | 117 |
| 7 | July 24, 2019 17:00 | July 24, 2019 17:45 | 45m | 36 | 27 |
| 8 | September 22, 2019 21:15 | September 22, 2019 22:15 | 1h | 36 | 36 |
| 9 | September 27, 2019 00:00 | September 27, 2019 01:00 | 1h | 36 | 36 |
| 10 | September 27, 2019 01:45 | September 27, 2019 15:45 | 14h | 36 | 327 |
Outage episodes by size in 2019: 2 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 2019, 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) | 2018 | 1.7 hrs | 1.08 | 1.7 hrs | 1.08 |
| Missoula Electric Coop, Inc | 2018 | 4.0 hrs | 1.49 | 2.8 hrs | 1.31 |
| 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 75% of Montana's customers in 2019; 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, 2019, 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/2019/montana/mineral-county