County annual report · FIPS 30009
2022 Carbon County, MT Power Outage Report
In 2022, customers in Carbon County, MT went without power for an average of 6.7 hours, a total of 44K customer-hours (Montana average 3.5 hours). That ranks 18th worst of 50 Montana counties and 1079th of 2,976 nationally.
Compared with MT, the US and 2021
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Carbon County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 13, 2022 06:15 | June 15, 2022 22:45 | 2d 16h | 2,575 | 31K |
| 2 | April 23, 2022 10:30 | April 24, 2022 02:00 | 15h 30m | 440 | 1,502 |
| 3 | August 13, 2022 22:45 | August 14, 2022 00:30 | 1h 45m | 440 | 562 |
| 4 | March 15, 2022 15:45 | March 15, 2022 18:30 | 2h 45m | 430 | 818 |
| 5 | May 27, 2022 13:45 | May 27, 2022 22:45 | 9h | 206 | 1,070 |
| 6 | June 28, 2022 16:30 | June 29, 2022 02:45 | 10h 15m | 160 | 905 |
| 7 | May 30, 2022 00:30 | May 30, 2022 02:15 | 1h 45m | 150 | 260 |
| 8 | July 8, 2022 20:00 | July 9, 2022 01:30 | 5h 30m | 132 | 630 |
| 9 | June 25, 2022 09:00 | June 25, 2022 11:30 | 2h 30m | 128 | 288 |
| 10 | July 6, 2022 18:30 | July 7, 2022 05:30 | 11h | 110 | 959 |
Outage episodes by size in 2022: 12 reached 100+ customers, 1 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 2022, 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) | 2022 | 2.2 hrs | 1.14 | 2.0 hrs | 1.09 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| Flathead Electric Coop Inc | 2022 | 11.5 hrs | 2.72 | 3.7 hrs | 1.82 |
| 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 76% of Montana's customers in 2022; 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, 2022, 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/2022/montana/carbon-county