County annual report · FIPS 30079
2018 Prairie County, MT Power Outage Report
In 2018, customers in Prairie County, MT went without power for an average of 0.2 hours, a total of 176 customer-hours (Montana average 1.9 hours). That ranks 15th worst of 20 Montana counties and 2612th of 2,798 nationally.
Compared with MT, the US and 2017
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Prairie County, 2018
The 5 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 19, 2018 12:45 | April 19, 2018 13:15 | 30m | 114 | 57 |
| 2 | April 25, 2018 02:45 | April 25, 2018 05:30 | 2h 45m | 30 | 83 |
| 3 | May 29, 2018 15:45 | May 29, 2018 17:45 | 2h | 16 | 32 |
| 4 | May 27, 2018 06:30 | May 27, 2018 06:45 | 15m | 14 | 4 |
| 5 | June 29, 2018 04:15 | June 29, 2018 04:30 | 15m | 5 | 1 |
Outage episodes by size in 2018: 1 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 2018, 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 16% of Montana's customers in 2018; 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, 2018, 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/2018/montana/prairie-county