County annual report · FIPS 46087
2023 McCook County, SD Power Outage Report
In 2023, customers in McCook County, SD went without power for an average of 4.2 hours, a total of 13K customer-hours (South Dakota average 2.3 hours). That ranks 12th worst of 61 South Dakota counties and 1634th of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in McCook County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 28, 2023 16:15 | September 28, 2023 17:00 | 45m | 790 | 593 |
| 2 | December 25, 2023 13:15 | December 25, 2023 16:45 | 3h 30m | 380 | 1,245 |
| 3 | December 25, 2023 18:15 | December 25, 2023 23:45 | 5h 30m | 380 | 767 |
| 4 | October 26, 2023 20:45 | October 26, 2023 21:00 | 15m | 177 | 44 |
| 5 | June 26, 2023 21:15 | July 6, 2023 13:45 | 9d 16h | 131 | 3,257 |
| 6 | September 19, 2023 14:45 | September 22, 2023 13:30 | 2d 22h | 97 | 192 |
| 7 | October 11, 2023 15:30 | October 13, 2023 09:45 | 1d 18h | 67 | 367 |
| 8 | July 14, 2023 16:45 | July 17, 2023 15:45 | 2d 23h | 53 | 110 |
| 9 | July 13, 2023 08:45 | July 13, 2023 10:15 | 1h 30m | 48 | 72 |
| 10 | April 27, 2023 14:30 | April 28, 2023 13:00 | 22h 30m | 37 | 185 |
Outage episodes by size in 2023: 5 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 McCook County reported on EIA Form 861 for 2023, 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 | 2023 | 1.7 hrs | 0.86 | 74 min | 0.77 |
| Sioux Valley SW Elec Coop | 2023 | 60 min | 1.46 | 60 min | 1.46 |
| 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 n/a of South Dakota's customers in 2023; 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, 2023, 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/2023/south-dakota/mccook-county