County annual report · FIPS 30009
2024 Carbon County, MT Power Outage Report
In 2024, customers in Carbon County, MT went without power for an average of 3.7 hours, a total of 24K customer-hours (Montana average 8.5 hours). That ranks 31st worst of 51 Montana counties and 1924th of 2,990 nationally.
Compared with MT, the US and 2023
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Carbon County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 3, 2024 21:30 | September 6, 2024 02:45 | 2d 5h | 3,383 | 11K |
| 2 | June 14, 2024 09:45 | June 14, 2024 14:00 | 4h 15m | 1,648 | 3,475 |
| 3 | November 13, 2024 19:00 | November 13, 2024 20:45 | 1h 45m | 964 | 1,687 |
| 4 | January 16, 2024 18:00 | January 17, 2024 00:45 | 6h 45m | 434 | 911 |
| 5 | May 14, 2024 22:45 | May 15, 2024 00:00 | 1h 15m | 433 | 436 |
| 6 | June 5, 2024 05:15 | June 5, 2024 08:15 | 3h | 433 | 1,294 |
| 7 | July 9, 2024 12:30 | July 9, 2024 15:30 | 3h | 160 | 340 |
| 8 | May 23, 2024 16:00 | May 24, 2024 00:15 | 8h 15m | 148 | 597 |
| 9 | March 21, 2024 03:15 | March 21, 2024 11:00 | 7h 45m | 125 | 957 |
| 10 | May 8, 2024 08:30 | May 8, 2024 14:00 | 5h 30m | 123 | 287 |
Outage episodes by size in 2024: 12 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 Carbon County reported on EIA Form 861 for 2024, 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) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| Flathead Electric Coop Inc | 2024 | 9.8 hrs | 2.72 | 3.9 hrs | 1.90 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Yellowstone Valley Elec Co-op | - | - | - | - | - |
| Beartooth 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 n/a of Montana's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,512 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. Carbon County has data for 2016, 2018–2025.
Cite this report
MassOutage (massoutage.com), Carbon County, MT annual power outage report, 2024, 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/2024/montana/carbon-county