County annual report · FIPS 30051
2024 Liberty County, MT Power Outage Report
In 2024, customers in Liberty County, MT went without power for an average of 7.9 hours, a total of 6,337 customer-hours (Montana average 8.5 hours). That ranks 18th worst of 51 Montana counties and 1142nd 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 Liberty 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 | May 7, 2024 17:00 | May 7, 2024 22:15 | 5h 15m | 846 | 1,136 |
| 2 | October 5, 2024 02:00 | October 5, 2024 08:00 | 6h | 595 | 1,796 |
| 3 | August 12, 2024 23:45 | August 13, 2024 05:15 | 5h 30m | 429 | 1,142 |
| 4 | June 4, 2024 21:30 | June 4, 2024 23:15 | 1h 45m | 152 | 265 |
| 5 | June 17, 2024 23:00 | June 18, 2024 00:45 | 1h 45m | 151 | 264 |
| 6 | August 20, 2024 02:30 | August 20, 2024 07:45 | 5h 15m | 151 | 755 |
| 7 | May 8, 2024 05:00 | May 8, 2024 06:45 | 1h 45m | 141 | 247 |
| 8 | April 2, 2024 07:00 | April 2, 2024 09:45 | 2h 45m | 60 | 128 |
| 9 | June 18, 2024 03:00 | June 18, 2024 06:00 | 3h | 50 | 150 |
| 10 | June 18, 2024 16:45 | June 18, 2024 19:00 | 2h 15m | 30 | 68 |
Outage episodes by size in 2024: 7 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 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 |
| 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 2024; 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, 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/liberty-county