County annual report · FIPS 46087
2018 McCook County, SD Power Outage Report
In 2018, customers in McCook County, SD went without power for an average of 0.5 hours, a total of 1,504 customer-hours (South Dakota average 1.1 hours). That ranks 15th worst of 30 South Dakota counties and 2506th of 2,798 nationally.
Compared with SD, the US and 2017
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in McCook County, 2018
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, 2018 02:15 | June 25, 2018 04:00 | 1h 45m | 386 | 676 |
| 2 | May 31, 2018 16:30 | May 31, 2018 17:15 | 45m | 138 | 70 |
| 3 | August 4, 2018 04:15 | August 4, 2018 08:00 | 3h 45m | 91 | 341 |
| 4 | June 17, 2018 12:15 | June 17, 2018 14:15 | 2h | 61 | 107 |
| 5 | August 14, 2018 17:45 | August 14, 2018 18:30 | 45m | 22 | 17 |
| 6 | August 25, 2018 19:15 | August 25, 2018 23:30 | 4h 15m | 16 | 49 |
| 7 | July 13, 2018 05:15 | July 13, 2018 13:15 | 8h | 13 | 44 |
| 8 | August 12, 2018 19:00 | August 12, 2018 21:00 | 2h | 13 | 19 |
| 9 | August 20, 2018 21:45 | August 20, 2018 23:30 | 1h 45m | 10 | 15 |
| 10 | July 30, 2018 17:00 | July 30, 2018 18:30 | 1h 30m | 8 | 12 |
Outage episodes by size in 2018: 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 McCook County reported on EIA Form 861 for 2018, 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 | 2018 | 90 min | 0.73 | 69 min | 0.62 |
| Sioux Valley SW Elec Coop | 2018 | 4.0 hrs | 3.62 | 2.0 hrs | 2.88 |
| 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 46% of South Dakota's customers in 2018; 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, 2018, 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/2018/south-dakota/mccook-county