County annual report · FIPS 30015
2023 Chouteau County, MT Power Outage Report
In 2023, customers in Chouteau County, MT went without power for an average of 11.8 hours, a total of 23K customer-hours (Montana average 1.8 hours). That ranks 3rd worst of 50 Montana counties and 723rd 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 Chouteau 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 | August 19, 2023 16:15 | August 19, 2023 19:15 | 3h | 1,516 | 2,832 |
| 2 | August 30, 2023 05:15 | August 30, 2023 23:30 | 18h 15m | 498 | 8,965 |
| 3 | January 28, 2023 15:15 | January 28, 2023 18:30 | 3h 15m | 465 | 1,511 |
| 4 | January 30, 2023 20:45 | January 30, 2023 22:00 | 1h 15m | 465 | 581 |
| 5 | August 5, 2023 02:00 | August 5, 2023 04:45 | 2h 45m | 465 | 1,279 |
| 6 | October 17, 2023 18:00 | October 17, 2023 20:45 | 2h 45m | 465 | 1,279 |
| 7 | October 18, 2023 00:00 | October 18, 2023 02:00 | 2h | 465 | 930 |
| 8 | November 3, 2023 19:30 | November 3, 2023 23:00 | 3h 30m | 465 | 1,512 |
| 9 | April 23, 2023 13:15 | April 23, 2023 16:30 | 3h 15m | 203 | 610 |
| 10 | April 19, 2023 11:00 | April 20, 2023 17:45 | 1d 6h | 192 | 1,404 |
Outage episodes by size in 2023: 13 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 Chouteau 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 | - | - | - | - | - |
| NorthWestern Energy | - | - | - | - | - |
| Fergus Electric Coop, Inc | - | - | - | - | - |
| Sun River Electric Coop, Inc | - | - | - | - | - |
| Hill County 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 ÷ 1,959 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. Chouteau County has data for 2020–2025.
Cite this report
MassOutage (massoutage.com), Chouteau 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/chouteau-county