Beaverhead CountyPower Outage History
2019–2025 · Montana
Top 20% most reliable nationally — infrequent, short outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 7, 2020 | 4 hrs | 2,560 (62%) | Unnamed event |
| Jul 13, 2022 | 1 hrs | 2,519 (61%) | Thunderstorm Wind |
| Nov 25, 2022 | 2 hrs | 2,518 (61%) | Unnamed event |
| Sep 22, 2022 | 3 hrs | 2,518 (61%) | Unnamed event |
| Nov 3, 2020 | <1 hr | 2,393 (58%) | Unnamed event |
Over the 7 years from 2019 to 2025, Beaverhead County recorded 81 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Beaverhead County started October 7, 2020, lasting 4 hours and leaving up to 2,560 customers without power (62% of the county) at its peak.
April has historically been the worst month for outages in Beaverhead County, with 9 events recorded during that month across the dataset.
Based on this history, Beaverhead County earns a Reliability Grade of A, placing it in the 84th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Beaverhead County's outage profile
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Outage-prep kit
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Similar counties in Montana
Counties with the closest reliability grade and national percentile to Beaverhead County.
| County | Grade | National percentile |
|---|---|---|
| Deer Lodge County | A | 83rd |
| Richland County | A | 83rd |
| Fergus County | A | 82nd |
| Custer County | A | 87th |
| Broadwater County | A | 81st |
Most reliable counties in Montana
The top 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Powder River County | A | 95th |
| Roosevelt County | A | 94th |
| Fallon County | A | 94th |
Least reliable counties in Montana
The bottom 3 counties in Montana by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Lincoln County | F | 14th |
| Sanders County | D | 20th |
| Madison County | D | 31st |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Beaverhead County?
Between 2019 and 2025, Beaverhead County recorded 81 outage events, averaging 2.8 hours each.
What is Beaverhead County's reliability grade?
Beaverhead County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in Beaverhead County?
The worst outage on record started October 7, 2020, lasting 4 hours and affecting up to 2,560 customers.