County annual report · FIPS 46061
2015 Hanson County, SD Power Outage Report
In 2015, customers in Hanson County, SD went without power for an average of 1.8 hours, a total of 3,514 customer-hours (South Dakota average 0.7 hours). That ranks 1st worst of 10 South Dakota counties and 1332nd 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 Hanson County, 2015
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 16, 2015 20:00 | December 16, 2015 21:45 | 1h 45m | 715 | 1,073 |
| 2 | August 18, 2015 12:00 | August 18, 2015 15:15 | 3h 15m | 714 | 2,142 |
| 3 | June 22, 2015 11:30 | June 22, 2015 19:15 | 7h 45m | 39 | 248 |
| 4 | June 23, 2015 01:30 | June 23, 2015 02:30 | 1h | 39 | 39 |
| 5 | October 8, 2015 23:00 | October 8, 2015 23:45 | 45m | 5 | 4 |
| 6 | August 18, 2015 16:30 | August 18, 2015 16:45 | 15m | 1 | 0 |
| 7 | November 2, 2015 16:45 | November 2, 2015 17:30 | 45m | 1 | 1 |
| 8 | November 23, 2015 23:45 | November 24, 2015 05:45 | 6h | 1 | 6 |
| 9 | December 8, 2015 20:30 | December 8, 2015 22:45 | 2h 15m | 1 | 2 |
Outage episodes by size in 2015: 2 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 Hanson 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| Central Electric Coop, Inc - (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 ÷ 1,960 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. Hanson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hanson 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/hanson-county