Roosevelt County Power Outage History
2017–2025 · Montana
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 30, 2017 | 0 hrs | 1,388 (19%) | Drought |
| Sep 18, 2024 | 3 hrs | 1,358 (19%) | Drought |
| Apr 24, 2022 | 3 hrs | 1,289 (18%) | Drought |
| Nov 16, 2023 | 1 hrs | 786 (11%) | Unnamed event |
| Nov 16, 2023 | 1 hrs | 781 (11%) | Unnamed event |
Over the 9 years from 2017 to 2025, Roosevelt County recorded 96 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in Roosevelt County started September 30, 2017 (Drought), lasting 0 hours and leaving up to 1,388 customers without power (19% of the county) at its peak.
June has historically been the worst month for outages in Roosevelt County, with 21 events recorded during that month across the dataset.
Based on this history, Roosevelt County earns a Reliability Grade of A, placing it in the 94th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Roosevelt County's outage profile
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Similar counties in Montana
Counties with the closest reliability grade and national percentile to Roosevelt County.
| County | Grade | National percentile |
|---|---|---|
| Fallon County | A | 94th |
| Big Horn County | A | 94th |
| Powder River County | A | 95th |
| Dawson County | A | 93rd |
| Gallatin County | A | 92nd |
FAQ
How often does power go out in Roosevelt County?
Between 2017 and 2025, Roosevelt County recorded 96 outage events, averaging 1.8 hours each.
What is Roosevelt County's reliability grade?
Roosevelt County has a Reliability Grade of A, in the 94th national percentile.
What was the worst power outage in Roosevelt County?
The worst outage on record started September 30, 2017 (Drought), lasting 0 hours and affecting up to 1,388 customers.