County annual report · FIPS 46125
2015 Turner County, SD Power Outage Report
In 2015, customers in Turner County, SD went without power for an average of 1.6 hours, a total of 7,926 customer-hours (South Dakota average 0.7 hours). That ranks 2nd worst of 10 South Dakota counties and 1415th 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 Turner 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 | May 9, 2015 14:30 | May 9, 2015 22:45 | 8h 15m | 557 | 2,368 |
| 2 | May 10, 2015 11:00 | May 10, 2015 13:00 | 2h | 556 | 837 |
| 3 | September 11, 2015 22:15 | September 12, 2015 00:30 | 2h 15m | 555 | 1,110 |
| 4 | September 12, 2015 11:30 | September 12, 2015 14:15 | 2h 45m | 555 | 1,526 |
| 5 | September 15, 2015 17:00 | September 15, 2015 17:15 | 15m | 555 | 139 |
| 6 | July 12, 2015 22:30 | July 13, 2015 01:30 | 3h | 235 | 705 |
| 7 | June 22, 2015 11:30 | June 22, 2015 23:00 | 11h 30m | 82 | 831 |
| 8 | June 23, 2015 00:00 | June 23, 2015 00:30 | 30m | 53 | 27 |
| 9 | July 1, 2015 09:00 | July 1, 2015 11:30 | 2h 30m | 31 | 34 |
| 10 | August 24, 2015 00:45 | August 24, 2015 04:15 | 3h 30m | 28 | 98 |
Outage episodes by size in 2015: 6 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 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 |
| NorthWestern Energy - (SD) | 2015 | 1.7 hrs | 1.07 | 1.6 hrs | 0.95 |
| 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) | - | - | - | - | - |
| 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 n/a of South Dakota's customers in 2015; 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, 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/turner-county