County annual report · FIPS 46095
2020 Mellette County, SD Power Outage Report
In 2020, customers in Mellette County, SD went without power for an average of 0.2 hours, a total of 77 customer-hours (South Dakota average 4.6 hours). That ranks 60th worst of 62 South Dakota counties and 2907th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Mellette County, 2020
The 8 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 29, 2020 17:00 | July 29, 2020 20:00 | 3h | 17 | 51 |
| 2 | April 15, 2020 16:00 | April 15, 2020 16:15 | 15m | 7 | 2 |
| 3 | April 21, 2020 01:45 | April 21, 2020 02:00 | 15m | 7 | 2 |
| 4 | June 7, 2020 03:00 | June 7, 2020 06:00 | 3h | 4 | 12 |
| 5 | June 3, 2020 15:00 | June 3, 2020 16:00 | 1h | 3 | 3 |
| 6 | July 2, 2020 21:30 | July 2, 2020 22:00 | 30m | 3 | 2 |
| 7 | November 14, 2020 22:15 | November 14, 2020 23:15 | 1h | 3 | 3 |
| 8 | January 13, 2020 21:15 | January 13, 2020 22:30 | 1h 15m | 2 | 3 |
Outage episodes by size in 2020: 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 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 |
|---|---|---|---|---|---|
| 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 79% of South Dakota's customers in 2020; 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, 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2020/south-dakota/mellette-county