County annual report · FIPS 46135
2024 Yankton County, SD Power Outage Report
In 2024, customers in Yankton County, SD went without power for an average of 0.8 hours, a total of 10K customer-hours (South Dakota average 2.3 hours). That ranks 53rd worst of 65 South Dakota counties and 2768th of 2,990 nationally.
Compared with SD, the US and 2023
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Yankton County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 29, 2024 17:00 | January 29, 2024 19:15 | 2h 15m | 1,500 | 582 |
| 2 | October 8, 2024 14:45 | October 8, 2024 17:30 | 2h 45m | 873 | 1,515 |
| 3 | October 12, 2024 13:45 | October 12, 2024 16:15 | 2h 30m | 449 | 787 |
| 4 | October 13, 2024 13:30 | October 13, 2024 15:30 | 2h | 448 | 784 |
| 5 | July 27, 2024 13:15 | July 27, 2024 15:30 | 2h 15m | 421 | 947 |
| 6 | June 20, 2024 16:30 | June 20, 2024 19:30 | 3h | 149 | 263 |
| 7 | August 29, 2024 17:00 | August 29, 2024 17:15 | 15m | 149 | 37 |
| 8 | October 28, 2024 23:00 | November 4, 2024 13:45 | 6d 14h | 114 | 472 |
| 9 | July 15, 2024 14:45 | July 15, 2024 20:30 | 5h 45m | 97 | 125 |
| 10 | September 2, 2024 15:45 | September 2, 2024 16:15 | 30m | 97 | 49 |
Outage episodes by size in 2024: 8 reached 100+ customers, 1 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 Yankton County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy - (SD) | 2024 | 76 min | 0.70 | 66 min | 0.65 |
| Bon Homme Yankton El Assn, Inc | 2018 | 34 min | 0.32 | 34 min | 0.32 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Clay-Union Electric Corp | - | - | - | - | - |
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 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 11,940 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. Yankton County has data for 2019–2025.
Cite this report
MassOutage (massoutage.com), Yankton County, SD annual power outage report, 2024, 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/2024/south-dakota/yankton-county