County annual report · FIPS 46099
2015 Minnehaha County, SD Power Outage Report
In 2015, customers in Minnehaha County, SD went without power for an average of 1.3 hours, a total of 118K customer-hours (South Dakota average 0.7 hours). That ranks 3rd worst of 10 South Dakota counties and 1606th of 2,484 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Minnehaha County, 2015
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 22, 2015 01:15 | June 22, 2015 14:45 | 13h 30m | 6,655 | 20K |
| 2 | August 27, 2015 23:00 | August 28, 2015 13:15 | 14h 15m | 5,004 | 13K |
| 3 | October 22, 2015 13:15 | October 22, 2015 18:00 | 4h 45m | 3,163 | 856 |
| 4 | October 12, 2015 11:45 | October 12, 2015 15:30 | 3h 45m | 3,154 | 5,904 |
| 5 | July 30, 2015 21:30 | July 30, 2015 22:45 | 1h 15m | 2,716 | 1,693 |
| 6 | August 20, 2015 12:00 | August 20, 2015 21:45 | 9h 45m | 2,488 | 1,953 |
| 7 | September 19, 2015 16:15 | September 19, 2015 19:00 | 2h 45m | 2,370 | 2,394 |
| 8 | June 23, 2015 01:30 | June 23, 2015 11:45 | 10h 15m | 2,290 | 6,323 |
| 9 | July 31, 2015 00:45 | July 31, 2015 04:00 | 3h 15m | 2,132 | 1,725 |
| 10 | June 22, 2015 20:00 | June 22, 2015 20:45 | 45m | 2,093 | 1,288 |
Outage episodes by size in 2015: 57 reached 100+ customers, 20 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 2015, 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 | 2015 | 2.1 hrs | 0.88 | 82 min | 0.81 |
| Sioux Valley SW Elec Coop | 2015 | 2.0 hrs | 1.29 | 2.0 hrs | 1.29 |
| 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 2015; 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, 2015, 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/2015/south-dakota/minnehaha-county