County annual report · FIPS 30023
2020 Deer Lodge County, MT Power Outage Report
In 2020, customers in Deer Lodge County, MT went without power for an average of 7.9 hours, a total of 52K customer-hours (Montana average 5.6 hours). That ranks 16th worst of 50 Montana counties and 974th of 3,019 nationally.
Compared with MT, the US and 2019
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Deer Lodge County, 2020
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 18, 2020 22:15 | October 19, 2020 02:30 | 4h 15m | 6,027 | 11K |
| 2 | June 22, 2020 14:30 | June 22, 2020 22:15 | 7h 45m | 1,669 | 1,428 |
| 3 | October 13, 2020 23:45 | October 14, 2020 13:00 | 13h 15m | 1,649 | 7,727 |
| 4 | December 11, 2020 15:15 | December 11, 2020 17:15 | 2h | 1,445 | 2,169 |
| 5 | July 16, 2020 15:30 | July 16, 2020 16:45 | 1h 15m | 1,433 | 1,791 |
| 6 | August 31, 2020 17:30 | August 31, 2020 19:15 | 1h 45m | 827 | 1,447 |
| 7 | November 25, 2020 00:45 | November 25, 2020 04:00 | 3h 15m | 630 | 1,634 |
| 8 | May 17, 2020 19:15 | May 18, 2020 00:30 | 5h 15m | 527 | 1,152 |
| 9 | June 8, 2020 09:15 | June 11, 2020 01:00 | 2d 15h | 524 | 6,078 |
| 10 | June 13, 2020 16:15 | June 14, 2020 19:00 | 1d 2h | 516 | 1,215 |
Outage episodes by size in 2020: 22 reached 100+ customers, 5 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 Deer Lodge County reported on EIA Form 861 for 2020, 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) | 2020 | 2.8 hrs | 1.13 | 2.0 hrs | 1.02 |
| Bonneville Power Administration | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Vigilante 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 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,663 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. Deer Lodge County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Deer Lodge County, MT annual power outage report, 2020, 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/2020/montana/deer-lodge-county