County annual report · FIPS 46127
2016 Union County, SD Power Outage Report
In 2016, customers in Union County, SD went without power for an average of 8.6 hours, a total of 29K customer-hours (South Dakota average 0.9 hours). That ranks 1st worst of 15 South Dakota counties and 409th of 2,391 nationally.
Compared with SD, the US and 2015
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Union County, 2016
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 6, 2016 18:45 | September 6, 2016 21:15 | 2h 30m | 3,566 | 2,904 |
| 2 | July 11, 2016 20:30 | July 12, 2016 09:45 | 13h 15m | 1,781 | 14K |
| 3 | June 18, 2016 02:00 | June 20, 2016 14:45 | 2d 12h | 1,135 | 5,305 |
| 4 | March 24, 2016 10:00 | March 24, 2016 21:00 | 11h | 951 | 2,989 |
| 5 | August 21, 2016 16:00 | August 21, 2016 16:15 | 15m | 938 | 235 |
| 6 | July 17, 2016 05:45 | July 17, 2016 06:45 | 1h | 503 | 378 |
| 7 | September 5, 2016 06:30 | September 5, 2016 09:30 | 3h | 501 | 1,242 |
| 8 | November 17, 2016 17:15 | November 17, 2016 18:00 | 45m | 501 | 197 |
| 9 | September 16, 2016 02:00 | September 16, 2016 02:45 | 45m | 379 | 284 |
| 10 | December 26, 2016 02:00 | December 27, 2016 01:15 | 23h 15m | 304 | 614 |
Outage episodes by size in 2016: 12 reached 100+ customers, 3 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 Union County reported on EIA Form 861 for 2016, 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2016 | 3.6 hrs | 1.64 | 83 min | 0.90 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Clay-Union Electric Corp | - | - | - | - | - |
| City of Beresford | - | - | - | - | - |
| City of Elk Point | - | - | - | - | - |
| Union County Electric Coop Inc | - | - | - | - | - |
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 2016; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,359 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. Union County has data for 2015–2017, 2019–2025.
Cite this report
MassOutage (massoutage.com), Union County, SD annual power outage report, 2016, 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/2016/south-dakota/union-county