County annual report · FIPS 30003
2022 Big Horn County, MT Power Outage Report
In 2022, customers in Big Horn County, MT went without power for an average of 1.9 hours, a total of 13K customer-hours (Montana average 3.5 hours). That ranks 39th worst of 50 Montana counties and 2318th 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 Big Horn 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 11, 2022 22:45 | June 12, 2022 23:00 | 1d | 1,778 | 12K |
| 2 | January 26, 2022 22:15 | January 26, 2022 22:30 | 15m | 105 | 26 |
| 3 | July 15, 2022 23:00 | July 16, 2022 00:45 | 1h 45m | 43 | 29 |
| 4 | July 15, 2022 14:15 | July 15, 2022 17:30 | 3h 15m | 37 | 120 |
| 5 | June 13, 2022 18:00 | June 13, 2022 23:00 | 5h | 31 | 143 |
| 6 | September 16, 2022 19:45 | September 16, 2022 21:30 | 1h 45m | 31 | 32 |
| 7 | January 26, 2022 02:45 | January 26, 2022 14:15 | 11h 30m | 30 | 330 |
| 8 | June 13, 2022 06:45 | June 13, 2022 12:00 | 5h 15m | 30 | 158 |
| 9 | June 14, 2022 18:45 | June 14, 2022 19:15 | 30m | 30 | 15 |
| 10 | May 30, 2022 09:00 | May 30, 2022 10:15 | 1h 15m | 27 | 34 |
Outage episodes by size in 2022: 2 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 Big Horn 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 |
| Powder River Energy Corp | 2022 | 5.1 hrs | 2.30 | 4.4 hrs | 2.18 |
| Big Horn Rural Electric Co | 2018 | 4.0 hrs | 1.80 | - | - |
| Mid-Yellowstone Elec Coop, Inc | 2018 | 4.5 hrs | 3.82 | 4.5 hrs | 3.82 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Tongue River Electric Coop Inc | - | - | - | - | - |
| Yellowstone Valley Elec Co-op | - | - | - | - | - |
| Big Horn County Elec 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 ÷ 6,865 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. Big Horn County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Big Horn 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/big-horn-county