County annual report · FIPS 30085
2017 Roosevelt County, MT Power Outage Report
In 2017, customers in Roosevelt County, MT went without power for an average of 1.0 hours, a total of 7,402 customer-hours (Montana average 2.7 hours). That ranks 11th worst of 19 Montana counties and 2032nd 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 Roosevelt 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 | September 30, 2017 03:45 | September 30, 2017 04:00 | 15m | 1,388 | 347 |
| 2 | March 7, 2017 18:00 | March 7, 2017 20:30 | 2h 30m | 725 | 1,706 |
| 3 | December 6, 2017 06:00 | December 6, 2017 07:45 | 1h 45m | 434 | 753 |
| 4 | March 30, 2017 22:30 | March 30, 2017 23:00 | 30m | 186 | 93 |
| 5 | July 27, 2017 23:15 | July 28, 2017 01:15 | 2h | 122 | 244 |
| 6 | August 10, 2017 18:15 | August 10, 2017 18:45 | 30m | 90 | 45 |
| 7 | July 27, 2017 15:45 | July 27, 2017 16:45 | 1h | 79 | 79 |
| 8 | July 11, 2017 00:00 | July 11, 2017 02:00 | 2h | 54 | 98 |
| 9 | August 12, 2017 14:15 | August 14, 2017 14:00 | 1d 23h | 49 | 274 |
| 10 | May 3, 2017 15:15 | May 3, 2017 21:45 | 6h 30m | 42 | 261 |
Outage episodes by size in 2017: 5 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 Roosevelt 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 | - | - | - | - | - |
| Mountrail-Williams Elec Coop | - | - | - | - | - |
| Sheridan Electric Coop, Inc | - | - | - | - | - |
| Lower Yellowstone R E A, Inc | - | - | - | - | - |
| NorVal Electric Cooperative, 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 ÷ 7,252 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. Roosevelt County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Roosevelt 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/roosevelt-county