County annual report · FIPS 30079
2017 Prairie County, MT Power Outage Report
In 2017, customers in Prairie County, MT went without power for an average of 1.3 hours, a total of 1,020 customer-hours (Montana average 2.7 hours). That ranks 9th worst of 19 Montana counties and 1894th of 2,786 nationally.
Compared with MT, the US
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Prairie County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 19, 2017 10:15 | July 19, 2017 16:15 | 6h | 123 | 710 |
| 2 | August 16, 2017 21:45 | August 16, 2017 22:00 | 15m | 119 | 30 |
| 3 | August 22, 2017 17:00 | August 22, 2017 18:45 | 1h 45m | 119 | 150 |
| 4 | August 16, 2017 18:30 | August 16, 2017 18:45 | 15m | 118 | 30 |
| 5 | August 24, 2017 16:30 | August 24, 2017 17:15 | 45m | 117 | 88 |
| 6 | April 14, 2017 17:15 | April 14, 2017 19:00 | 1h 45m | 5 | 9 |
| 7 | June 10, 2017 06:00 | June 10, 2017 06:15 | 15m | 4 | 1 |
| 8 | July 11, 2017 00:45 | July 11, 2017 01:00 | 15m | 4 | 1 |
| 9 | February 16, 2017 03:15 | February 16, 2017 04:30 | 1h 15m | 2 | 3 |
| 10 | August 2, 2017 08:15 | August 2, 2017 08:30 | 15m | 2 | 1 |
Outage episodes by size in 2017: 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 Prairie County reported on EIA Form 861 for 2017, 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 |
|---|---|---|---|---|---|
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Montana-Dakota Utilities Co | - | - | - | - | - |
| McCone Electric Coop Inc | - | - | - | - | - |
| Tongue 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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 758 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. Prairie County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Prairie County, MT annual power outage report, 2017, 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/). https://massoutage.com/reports/2017/montana/prairie-county