County annual report · FIPS 30037
2020 Golden Valley County, MT Power Outage Report
In 2020, customers in Golden Valley County, MT went without power for an average of 9.5 hours, a total of 3,002 customer-hours (Montana average 5.6 hours). That ranks 14th worst of 50 Montana counties and 827th 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 Golden Valley 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 | August 4, 2020 03:30 | August 4, 2020 09:45 | 6h 15m | 178 | 505 |
| 2 | May 20, 2020 07:45 | May 20, 2020 13:00 | 5h 15m | 94 | 350 |
| 3 | September 2, 2020 15:45 | September 4, 2020 02:00 | 1d 10h | 77 | 183 |
| 4 | December 9, 2020 16:00 | December 10, 2020 00:30 | 8h 30m | 71 | 510 |
| 5 | January 31, 2020 20:45 | February 2, 2020 04:15 | 1d 7h | 55 | 144 |
| 6 | March 6, 2020 19:00 | March 7, 2020 01:45 | 6h 45m | 51 | 275 |
| 7 | September 9, 2020 14:45 | September 9, 2020 20:30 | 5h 45m | 36 | 207 |
| 8 | March 5, 2020 13:45 | March 5, 2020 20:30 | 6h 45m | 30 | 50 |
| 9 | July 20, 2020 01:00 | July 20, 2020 05:15 | 4h 15m | 27 | 91 |
| 10 | October 11, 2020 15:00 | October 11, 2020 20:15 | 5h 15m | 22 | 57 |
Outage episodes by size in 2020: 1 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 Golden Valley 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 |
| Fergus 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 ÷ 316 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. Golden Valley County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Golden Valley 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/golden-valley-county