County annual report · FIPS 46095
2019 Mellette County, SD Power Outage Report
In 2019, customers in Mellette County, SD went without power for an average of 1.0 hours, a total of 403 customer-hours (South Dakota average 3.8 hours). That ranks 31st worst of 58 South Dakota counties and 2490th of 2,945 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Mellette County, 2019
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 13, 2019 23:45 | July 14, 2019 06:30 | 6h 45m | 7 | 42 |
| 2 | December 29, 2019 06:45 | December 29, 2019 07:30 | 45m | 7 | 5 |
| 3 | December 30, 2019 01:15 | December 30, 2019 02:45 | 1h 30m | 7 | 7 |
| 4 | July 1, 2019 03:45 | July 1, 2019 06:00 | 2h 15m | 3 | 7 |
| 5 | July 3, 2019 13:00 | July 3, 2019 16:45 | 3h 45m | 3 | 10 |
| 6 | July 3, 2019 19:30 | July 4, 2019 08:30 | 13h | 3 | 39 |
| 7 | July 4, 2019 10:15 | July 8, 2019 01:30 | 3d 15h | 3 | 260 |
| 8 | July 8, 2019 04:00 | July 8, 2019 13:45 | 9h 45m | 3 | 29 |
| 9 | July 26, 2019 23:45 | July 27, 2019 04:00 | 4h 15m | 1 | 4 |
Outage episodes by size in 2019: 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 2019, 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 87% of South Dakota's customers in 2019; 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, 2019, 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/2019/south-dakota/mellette-county