County annual report · FIPS 30107
2021 Wheatland County, MT Power Outage Report
In 2021, customers in Wheatland County, MT went without power for an average of 16.4 hours, a total of 12K customer-hours (Montana average 5.0 hours). That ranks 7th worst of 51 Montana counties and 522nd of 2,974 nationally.
Compared with MT, the US and 2020
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Wheatland County, 2021
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 29, 2021 10:30 | July 29, 2021 18:00 | 7h 30m | 799 | 3,069 |
| 2 | July 1, 2021 06:15 | July 1, 2021 08:45 | 2h 30m | 399 | 898 |
| 3 | January 13, 2021 21:15 | January 17, 2021 01:15 | 3d 4h | 296 | 2,943 |
| 4 | November 16, 2021 17:00 | November 16, 2021 18:15 | 1h 15m | 283 | 354 |
| 5 | December 22, 2021 09:15 | December 22, 2021 12:30 | 3h 15m | 283 | 920 |
| 6 | January 22, 2021 00:30 | January 22, 2021 07:00 | 6h 30m | 168 | 303 |
| 7 | December 26, 2021 16:45 | December 26, 2021 23:30 | 6h 45m | 147 | 748 |
| 8 | November 23, 2021 00:30 | November 23, 2021 02:00 | 1h 30m | 143 | 215 |
| 9 | January 11, 2021 01:00 | January 11, 2021 02:00 | 1h | 106 | 106 |
| 10 | May 15, 2021 08:15 | May 15, 2021 13:00 | 4h 45m | 75 | 153 |
Outage episodes by size in 2021: 9 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 Wheatland County reported on EIA Form 861 for 2021, 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) | 2021 | 2.5 hrs | 1.37 | 2.1 hrs | 1.18 |
| 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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 705 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. Wheatland County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Wheatland County, MT annual power outage report, 2021, 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/2021/montana/wheatland-county