County annual report · FIPS 30005
2020 Blaine County, MT Power Outage Report
In 2020, customers in Blaine County, MT went without power for an average of 6.5 hours, a total of 18K customer-hours (Montana average 5.6 hours). That ranks 21st worst of 50 Montana counties and 1170th of 3,019 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Blaine 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 | July 7, 2020 23:30 | July 8, 2020 03:30 | 4h | 1,568 | 6,058 |
| 2 | December 22, 2020 17:30 | December 23, 2020 02:15 | 8h 45m | 1,358 | 4,232 |
| 3 | October 30, 2020 00:00 | October 30, 2020 04:30 | 4h 30m | 488 | 2,074 |
| 4 | November 18, 2020 18:45 | November 18, 2020 22:45 | 4h | 220 | 880 |
| 5 | August 21, 2020 02:30 | August 21, 2020 09:00 | 6h 30m | 158 | 433 |
| 6 | April 4, 2020 12:15 | April 4, 2020 16:30 | 4h 15m | 147 | 625 |
| 7 | March 26, 2020 15:00 | March 26, 2020 17:00 | 2h | 128 | 256 |
| 8 | December 3, 2020 19:15 | December 3, 2020 20:15 | 1h | 126 | 126 |
| 9 | May 5, 2020 16:00 | May 5, 2020 17:30 | 1h 30m | 83 | 125 |
| 10 | August 21, 2020 20:15 | August 21, 2020 21:45 | 1h 30m | 81 | 122 |
Outage episodes by size in 2020: 8 reached 100+ customers, 2 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 Blaine 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Hill County Electric Coop, Inc | - | - | - | - | - |
| Big Flat Electric Coop Inc | - | - | - | - | - |
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 ÷ 2,740 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. Blaine County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Blaine 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/blaine-county