County annual report · FIPS 30051
2022 Liberty County, MT Power Outage Report
In 2022, customers in Liberty County, MT went without power for an average of 19.2 hours, a total of 15K customer-hours (Montana average 3.5 hours). That ranks 3rd worst of 50 Montana counties and 346th 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 Liberty 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 | October 23, 2022 09:15 | October 26, 2022 00:15 | 2d 15h | 1,532 | 6,384 |
| 2 | November 5, 2022 16:45 | November 6, 2022 02:45 | 10h | 818 | 3,509 |
| 3 | November 23, 2022 13:00 | November 23, 2022 15:00 | 2h | 818 | 1,598 |
| 4 | July 19, 2022 03:30 | July 19, 2022 06:00 | 2h 30m | 393 | 675 |
| 5 | March 3, 2022 03:30 | March 3, 2022 07:00 | 3h 30m | 203 | 508 |
| 6 | July 18, 2022 19:00 | July 19, 2022 01:15 | 6h 15m | 154 | 328 |
| 7 | September 14, 2022 05:15 | September 14, 2022 06:30 | 1h 15m | 153 | 191 |
| 8 | June 15, 2022 14:15 | June 15, 2022 21:30 | 7h 15m | 148 | 458 |
| 9 | June 15, 2022 22:15 | June 16, 2022 01:45 | 3h 30m | 61 | 176 |
| 10 | June 14, 2022 23:30 | June 15, 2022 03:00 | 3h 30m | 53 | 83 |
Outage episodes by size in 2022: 8 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 Liberty 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Sun River Electric Coop, Inc | - | - | - | - | - |
| Hill County Electric Coop, Inc | - | - | - | - | - |
| Marias River 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 ÷ 804 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. Liberty County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Liberty 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/liberty-county