County annual report · FIPS 46095
2022 Mellette County, SD Power Outage Report
In 2022, customers in Mellette County, SD went without power for an average of 2.4 hours, a total of 971 customer-hours (South Dakota average 6.9 hours). That ranks 44th worst of 63 South Dakota counties and 2146th of 2,976 nationally.
Compared with SD, the US and 2021
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Mellette 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 | June 13, 2022 03:00 | June 15, 2022 12:30 | 2d 9h | 22 | 760 |
| 2 | April 4, 2022 22:45 | April 5, 2022 00:45 | 2h | 5 | 10 |
| 3 | November 12, 2022 07:30 | November 12, 2022 09:45 | 2h 15m | 5 | 11 |
| 4 | December 17, 2022 04:15 | December 17, 2022 15:00 | 10h 45m | 5 | 54 |
| 5 | December 17, 2022 18:00 | December 17, 2022 22:00 | 4h | 5 | 19 |
| 6 | December 25, 2022 18:30 | December 25, 2022 22:15 | 3h 45m | 5 | 19 |
| 7 | December 26, 2022 19:45 | December 26, 2022 22:00 | 2h 15m | 5 | 11 |
| 8 | December 13, 2022 21:00 | December 13, 2022 22:30 | 1h 30m | 4 | 6 |
| 9 | March 21, 2022 17:00 | March 21, 2022 20:15 | 3h 15m | 2 | 7 |
| 10 | December 14, 2022 14:15 | December 14, 2022 16:30 | 2h 15m | 2 | 5 |
Outage episodes by size in 2022: 0 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 Mellette 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 |
|---|---|---|---|---|---|
| West Central Electric Coop Inc - (SD) | 2018 | 3.7 hrs | 1.25 | 1.5 hrs | 1.25 |
| LaCreek Electric Assn, Inc | - | - | - | - | - |
| Cherry-Todd Electric Coop, Inc | - | - | - | - | - |
| Rosebud 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 89% of South Dakota's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 403 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. Mellette County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Mellette County, SD 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2022/south-dakota/mellette-county