County annual report · FIPS 46061
2018 Hanson County, SD Power Outage Report
In 2018, customers in Hanson County, SD went without power for an average of 1.0 hours, a total of 2,006 customer-hours (South Dakota average 1.1 hours). That ranks 9th worst of 30 South Dakota counties and 2301st of 2,798 nationally.
Compared with SD, the US and 2017
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Hanson County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 25, 2018 02:15 | June 25, 2018 04:00 | 1h 45m | 722 | 1,264 |
| 2 | May 22, 2018 09:15 | May 22, 2018 10:45 | 1h 30m | 264 | 396 |
| 3 | May 28, 2018 23:30 | May 29, 2018 02:30 | 3h | 129 | 233 |
| 4 | July 9, 2018 22:15 | July 9, 2018 23:30 | 1h 15m | 73 | 73 |
| 5 | June 18, 2018 12:45 | June 18, 2018 14:15 | 1h 30m | 3 | 5 |
| 6 | April 26, 2018 14:15 | April 26, 2018 16:15 | 2h | 2 | 4 |
| 7 | March 14, 2018 13:15 | March 14, 2018 16:30 | 3h 15m | 1 | 3 |
| 8 | March 15, 2018 13:15 | March 15, 2018 15:45 | 2h 30m | 1 | 3 |
| 9 | April 9, 2018 15:00 | April 9, 2018 19:00 | 4h | 1 | 4 |
| 10 | May 29, 2018 13:45 | May 29, 2018 15:15 | 1h 30m | 1 | 2 |
Outage episodes by size in 2018: 3 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 2018, 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 | 2018 | 90 min | 0.73 | 69 min | 0.62 |
| NorthWestern Energy - (SD) | 2018 | 1.9 hrs | 1.24 | 1.6 hrs | 1.13 |
| 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 46% of South Dakota's customers in 2018; 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, 2018, 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/2018/south-dakota/hanson-county