County annual report · FIPS 46099
2017 Minnehaha County, SD Power Outage Report
In 2017, customers in Minnehaha County, SD went without power for an average of 1.1 hours, a total of 98K customer-hours (South Dakota average 0.8 hours). That ranks 9th worst of 26 South Dakota counties and 2020th of 2,786 nationally.
Compared with SD, the US and 2016
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Minnehaha County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 26, 2017 01:15 | April 26, 2017 02:00 | 45m | 7,875 | 2,249 |
| 2 | May 18, 2017 22:30 | May 19, 2017 03:30 | 5h | 2,259 | 4,537 |
| 3 | June 13, 2017 22:45 | June 15, 2017 17:00 | 1d 18h | 2,140 | 11K |
| 4 | May 1, 2017 06:30 | May 2, 2017 08:30 | 1d 2h | 1,966 | 13K |
| 5 | April 4, 2017 05:45 | April 4, 2017 14:45 | 9h | 1,935 | 3,977 |
| 6 | March 30, 2017 03:45 | March 30, 2017 11:00 | 7h 15m | 1,805 | 2,031 |
| 7 | August 21, 2017 07:15 | August 21, 2017 09:30 | 2h 15m | 1,708 | 3,841 |
| 8 | December 26, 2017 10:00 | December 26, 2017 23:45 | 13h 45m | 1,334 | 4,462 |
| 9 | July 18, 2017 04:45 | July 18, 2017 22:30 | 17h 45m | 1,324 | 4,775 |
| 10 | August 10, 2017 06:15 | August 10, 2017 08:00 | 1h 45m | 1,291 | 2,258 |
Outage episodes by size in 2017: 53 reached 100+ customers, 14 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 Minnehaha County reported on EIA Form 861 for 2017, 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 | 2017 | 1.6 hrs | 0.73 | 58 min | 0.61 |
| Sioux Valley SW Elec Coop | 2017 | 2.3 hrs | 1.61 | 88 min | 1.43 |
| 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 n/a of South Dakota's customers in 2017; 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, 2017, 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/2017/south-dakota/minnehaha-county