County annual report · FIPS 46099
2019 Minnehaha County, SD Power Outage Report
In 2019, customers in Minnehaha County, SD went without power for an average of 10.2 hours, a total of 936K customer-hours (South Dakota average 3.8 hours). That ranks 6th worst of 58 South Dakota counties and 534th of 2,945 nationally.
Compared with SD, the US and 2018
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Minnehaha County, 2019
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 11, 2019 04:00 | October 2, 2019 20:30 | 21d 16h | 13,763 | 207K |
| 2 | April 7, 2019 11:45 | April 17, 2019 21:30 | 10d 9h | 10,809 | 293K |
| 3 | July 8, 2019 04:00 | July 27, 2019 18:15 | 19d 14h | 6,194 | 48K |
| 4 | October 9, 2019 13:15 | October 18, 2019 18:00 | 9d 4h | 4,405 | 12K |
| 5 | March 13, 2019 17:00 | April 7, 2019 10:00 | 24d 17h | 4,104 | 14K |
| 6 | October 7, 2019 02:00 | October 7, 2019 14:00 | 12h | 2,928 | 5,556 |
| 7 | June 19, 2019 13:45 | July 8, 2019 02:15 | 18d 12h | 2,724 | 15K |
| 8 | January 1, 2019 00:15 | January 1, 2019 06:15 | 6h | 1,908 | 2,867 |
| 9 | March 9, 2019 13:15 | March 9, 2019 21:00 | 7h 45m | 1,776 | 3,276 |
| 10 | August 10, 2019 04:15 | August 11, 2019 00:00 | 19h 45m | 1,747 | 4,881 |
Outage episodes by size in 2019: 47 reached 100+ customers, 12 reached 1,000+ customers, 2 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 Minnehaha 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 |
|---|---|---|---|---|---|
| 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) | - | - | - | - | - |
| City of Sioux Falls - (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 87% of South Dakota's customers in 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 91,940 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. Minnehaha County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Minnehaha 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/minnehaha-county