County annual report · FIPS 46087
2020 McCook County, SD Power Outage Report
In 2020, customers in McCook County, SD went without power for an average of 6.6 hours, a total of 20K customer-hours (South Dakota average 4.6 hours). That ranks 11th worst of 62 South Dakota counties and 1151st 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 McCook County, 2020
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 25, 2020 23:15 | June 26, 2020 02:30 | 3h 15m | 1,160 | 1,222 |
| 2 | April 9, 2020 10:15 | April 15, 2020 21:30 | 6d 11h | 603 | 1,524 |
| 3 | September 10, 2020 16:45 | October 13, 2020 13:45 | 32d 21h | 214 | 8,485 |
| 4 | April 28, 2020 12:00 | April 29, 2020 21:15 | 1d 9h | 157 | 539 |
| 5 | January 22, 2020 17:15 | January 22, 2020 18:45 | 1h 30m | 131 | 195 |
| 6 | February 14, 2020 12:00 | February 14, 2020 12:45 | 45m | 131 | 66 |
| 7 | February 14, 2020 13:30 | February 14, 2020 13:45 | 15m | 131 | 33 |
| 8 | August 10, 2020 18:00 | August 10, 2020 18:45 | 45m | 94 | 71 |
| 9 | December 4, 2020 01:30 | December 4, 2020 03:30 | 2h | 94 | 186 |
| 10 | October 16, 2020 20:30 | October 16, 2020 21:30 | 1h | 93 | 93 |
Outage episodes by size in 2020: 7 reached 100+ customers, 1 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 McCook 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 |
|---|---|---|---|---|---|
| Northern States Power Co - Minnesota | 2020 | 1.7 hrs | 0.84 | 68 min | 0.71 |
| Sioux Valley SW Elec Coop | 2020 | 1.5 hrs | 2.73 | 83 min | 2.32 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
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 ÷ 3,102 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. McCook County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), McCook 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/mccook-county