County annual report · FIPS 30073
2023 Pondera County, MT Power Outage Report
In 2023, customers in Pondera County, MT went without power for an average of 1.9 hours, a total of 3,796 customer-hours (Montana average 1.8 hours). That ranks 25th worst of 50 Montana counties and 2338th 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 Pondera 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 | April 19, 2023 00:45 | April 19, 2023 05:30 | 4h 45m | 546 | 1,645 |
| 2 | August 6, 2023 19:30 | August 6, 2023 23:00 | 3h 30m | 192 | 354 |
| 3 | August 5, 2023 17:30 | August 5, 2023 20:45 | 3h 15m | 161 | 127 |
| 4 | January 17, 2023 03:15 | January 17, 2023 07:15 | 4h | 138 | 469 |
| 5 | February 22, 2023 18:30 | February 22, 2023 19:45 | 1h 15m | 133 | 166 |
| 6 | August 12, 2023 23:15 | August 13, 2023 02:30 | 3h 15m | 69 | 54 |
| 7 | April 19, 2023 09:15 | April 20, 2023 05:30 | 20h 15m | 60 | 180 |
| 8 | October 26, 2023 10:15 | October 26, 2023 12:30 | 2h 15m | 29 | 65 |
| 9 | August 13, 2023 21:15 | August 13, 2023 23:45 | 2h 30m | 21 | 37 |
| 10 | June 13, 2023 05:45 | June 13, 2023 09:15 | 3h 30m | 17 | 27 |
Outage episodes by size in 2023: 5 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 Pondera 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 | - | - | - | - | - |
| Glacier 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 ÷ 2,031 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. Pondera County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Pondera 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/pondera-county