County annual report · FIPS 30085
2020 Roosevelt County, MT Power Outage Report
In 2020, customers in Roosevelt County, MT went without power for an average of 0.3 hours, a total of 2,135 customer-hours (Montana average 5.6 hours). That ranks 48th worst of 50 Montana counties and 2879th of 3,019 nationally.
Compared with MT, the US and 2019
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Roosevelt County, 2020
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 22, 2020 18:00 | September 22, 2020 18:15 | 15m | 638 | 160 |
| 2 | May 12, 2020 05:30 | May 12, 2020 05:45 | 15m | 630 | 158 |
| 3 | April 24, 2020 09:15 | April 24, 2020 11:00 | 1h 45m | 363 | 634 |
| 4 | June 24, 2020 19:30 | June 24, 2020 21:15 | 1h 45m | 171 | 297 |
| 5 | June 22, 2020 16:45 | June 22, 2020 17:15 | 30m | 116 | 58 |
| 6 | May 7, 2020 04:30 | May 7, 2020 09:45 | 5h 15m | 85 | 446 |
| 7 | January 19, 2020 05:45 | January 19, 2020 10:30 | 4h 45m | 62 | 147 |
| 8 | May 6, 2020 00:30 | May 6, 2020 04:00 | 3h 30m | 15 | 26 |
| 9 | May 13, 2020 19:45 | May 13, 2020 21:15 | 1h 30m | 12 | 16 |
| 10 | September 17, 2020 19:00 | September 17, 2020 20:30 | 1h 30m | 11 | 17 |
Outage episodes by size in 2020: 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 Roosevelt County reported on EIA Form 861 for 2020, 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 76% of Montana's customers in 2020; 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, 2020, 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/2020/montana/roosevelt-county