County annual report · FIPS 30091
2022 Sheridan County, MT Power Outage Report
In 2022, customers in Sheridan County, MT went without power for an average of 1.2 hours, a total of 2,147 customer-hours (Montana average 3.5 hours). That ranks 45th worst of 50 Montana counties and 2624th of 2,976 nationally.
Compared with MT, the US and 2021
Coverage line is EAGLE-I's share of Montana customers tracked each year.
Biggest outages in Sheridan County, 2022
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 24, 2022 08:30 | April 24, 2022 21:15 | 12h 45m | 290 | 1,239 |
| 2 | February 24, 2022 05:30 | February 24, 2022 10:30 | 5h | 109 | 415 |
| 3 | September 13, 2022 23:45 | September 14, 2022 00:00 | 15m | 85 | 21 |
| 4 | December 12, 2022 18:30 | December 12, 2022 19:30 | 1h | 68 | 67 |
| 5 | December 1, 2022 18:30 | December 1, 2022 19:15 | 45m | 65 | 49 |
| 6 | January 21, 2022 19:15 | January 21, 2022 21:30 | 2h 15m | 49 | 99 |
| 7 | July 18, 2022 21:30 | July 19, 2022 00:30 | 3h | 36 | 64 |
| 8 | September 4, 2022 18:45 | September 4, 2022 20:00 | 1h 15m | 31 | 39 |
| 9 | July 10, 2022 06:15 | July 10, 2022 06:30 | 15m | 28 | 7 |
| 10 | May 25, 2022 06:30 | May 25, 2022 09:15 | 2h 45m | 24 | 28 |
Outage episodes by size in 2022: 2 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 Sheridan County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Montana-Dakota Utilities Co | - | - | - | - | - |
| Sheridan 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 76% of Montana's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,766 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. Sheridan County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sheridan County, MT annual power outage report, 2022, 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/2022/montana/sheridan-county