County annual report · FIPS 30051
2023 Liberty County, MT Power Outage Report
In 2023, customers in Liberty County, MT went without power for an average of 0.5 hours, a total of 416 customer-hours (Montana average 1.8 hours). That ranks 43rd worst of 50 Montana counties and 2812th of 2,977 nationally.
Compared with MT, the US and 2022
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Liberty County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 25, 2023 00:00 | February 25, 2023 07:15 | 7h 15m | 30 | 210 |
| 2 | March 23, 2023 14:15 | March 23, 2023 16:45 | 2h 30m | 12 | 16 |
| 3 | April 2, 2023 14:00 | April 2, 2023 16:45 | 2h 45m | 12 | 14 |
| 4 | August 12, 2023 02:45 | August 12, 2023 05:30 | 2h 45m | 10 | 13 |
| 5 | October 18, 2023 13:30 | October 18, 2023 16:15 | 2h 45m | 10 | 14 |
| 6 | July 3, 2023 14:30 | July 3, 2023 18:15 | 3h 45m | 7 | 11 |
| 7 | May 17, 2023 03:45 | May 17, 2023 08:00 | 4h 15m | 6 | 26 |
| 8 | July 17, 2023 18:30 | July 17, 2023 21:15 | 2h 45m | 4 | 11 |
| 9 | January 4, 2023 19:15 | January 4, 2023 21:15 | 2h | 3 | 6 |
| 10 | April 5, 2023 15:45 | April 5, 2023 18:45 | 3h | 3 | 7 |
Outage episodes by size in 2023: 0 reached 100+ customers, 0 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 2023, 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) | 2023 | 1.7 hrs | 0.93 | 1.7 hrs | 0.93 |
| 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 n/a of Montana's customers in 2023; 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, 2023, 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/2023/montana/liberty-county