County annual report · FIPS 46095
2024 Mellette County, SD Power Outage Report
In 2024, customers in Mellette County, SD went without power for an average of 31.1 hours, a total of 13K customer-hours (South Dakota average 2.3 hours). That ranks 3rd worst of 65 South Dakota counties and 318th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Mellette County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 30, 2024 03:00 | March 30, 2024 08:30 | 5h 30m | 533 | 2,612 |
| 2 | April 19, 2024 13:00 | April 19, 2024 18:15 | 5h 15m | 425 | 2,034 |
| 3 | September 5, 2024 14:45 | December 19, 2024 09:30 | 104d 18h | 49 | 5,092 |
| 4 | January 13, 2024 11:15 | January 13, 2024 13:00 | 1h 45m | 17 | 30 |
| 5 | June 21, 2024 01:00 | July 2, 2024 14:45 | 11d 13h | 13 | 447 |
| 6 | July 14, 2024 07:15 | July 14, 2024 18:30 | 11h 15m | 12 | 98 |
| 7 | April 20, 2024 16:45 | April 26, 2024 13:45 | 5d 21h | 10 | 197 |
| 8 | January 4, 2024 17:45 | January 4, 2024 19:15 | 1h 30m | 9 | 8 |
| 9 | March 31, 2024 11:30 | March 31, 2024 14:00 | 2h 30m | 8 | 18 |
| 10 | March 31, 2024 15:45 | March 31, 2024 18:15 | 2h 30m | 8 | 20 |
Outage episodes by size in 2024: 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 Mellette County reported on EIA Form 861 for 2024, 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 |
| Rosebud Electric Coop Inc | 2024 | 1.9 hrs | 0.84 | 1.6 hrs | 0.76 |
| LaCreek Electric Assn, Inc | - | - | - | - | - |
| Cherry-Todd 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 n/a of South Dakota's customers in 2024; 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, 2024, 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/2024/south-dakota/mellette-county