County annual report · FIPS 46125
2021 Turner County, SD Power Outage Report
In 2021, customers in Turner County, SD went without power for an average of 5.6 hours, a total of 28K customer-hours (South Dakota average 3.4 hours). That ranks 10th worst of 61 South Dakota counties and 1208th of 2,974 nationally.
Compared with SD, the US and 2020
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Turner County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 19, 2021 15:00 | August 30, 2021 14:45 | 10d 23h | 815 | 9,818 |
| 2 | March 15, 2021 04:30 | March 18, 2021 21:30 | 3d 17h | 345 | 1,526 |
| 3 | February 16, 2021 13:15 | February 16, 2021 15:45 | 2h 30m | 203 | 144 |
| 4 | September 17, 2021 19:45 | September 17, 2021 22:00 | 2h 15m | 172 | 381 |
| 5 | June 10, 2021 11:00 | June 16, 2021 21:00 | 6d 10h | 151 | 2,271 |
| 6 | June 3, 2021 19:45 | June 3, 2021 21:30 | 1h 45m | 150 | 39 |
| 7 | November 2, 2021 17:00 | November 2, 2021 19:00 | 2h | 150 | 39 |
| 8 | August 4, 2021 15:45 | August 10, 2021 12:45 | 5d 21h | 133 | 772 |
| 9 | September 15, 2021 14:15 | September 16, 2021 13:30 | 23h 15m | 126 | 136 |
| 10 | August 2, 2021 12:45 | August 2, 2021 15:00 | 2h 15m | 94 | 105 |
Outage episodes by size in 2021: 9 reached 100+ customers, 0 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 Turner County reported on EIA Form 861 for 2021, 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 | 2021 | 1.8 hrs | 0.82 | 77 min | 0.74 |
| NorthWestern Energy - (SD) | 2021 | 1.5 hrs | 0.95 | 81 min | 0.83 |
| Sioux Valley SW Elec Coop | 2021 | 1.8 hrs | 1.08 | 1.5 hrs | 0.93 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Clay-Union Electric Corp | - | - | - | - | - |
| City of Parker - (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 79% of South Dakota's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,964 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. Turner County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Turner County, SD annual power outage report, 2021, 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/2021/south-dakota/turner-county