County annual report · FIPS 46061
2020 Hanson County, SD Power Outage Report
In 2020, customers in Hanson County, SD went without power for an average of 0.8 hours, a total of 1,661 customer-hours (South Dakota average 4.6 hours). That ranks 48th worst of 62 South Dakota counties and 2719th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Hanson County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 22, 2020 13:45 | October 22, 2020 21:15 | 7h 30m | 418 | 602 |
| 2 | June 16, 2020 20:00 | June 16, 2020 21:00 | 1h | 85 | 85 |
| 3 | February 12, 2020 18:15 | February 12, 2020 20:30 | 2h 15m | 34 | 19 |
| 4 | June 25, 2020 23:15 | June 26, 2020 03:15 | 4h | 28 | 68 |
| 5 | July 6, 2020 20:15 | July 6, 2020 22:45 | 2h 30m | 26 | 51 |
| 6 | August 17, 2020 01:45 | August 17, 2020 03:15 | 1h 30m | 26 | 35 |
| 7 | August 20, 2020 01:15 | August 20, 2020 03:15 | 2h | 26 | 48 |
| 8 | August 16, 2020 05:45 | August 16, 2020 08:00 | 2h 15m | 25 | 48 |
| 9 | August 17, 2020 23:00 | August 18, 2020 02:00 | 3h | 23 | 64 |
| 10 | March 20, 2020 21:30 | March 21, 2020 00:00 | 2h 30m | 22 | 55 |
Outage episodes by size in 2020: 1 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 2020, 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 | 2020 | 1.7 hrs | 0.84 | 68 min | 0.71 |
| NorthWestern Energy - (SD) | 2020 | 2.6 hrs | 1.54 | 1.9 hrs | 1.28 |
| 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 79% of South Dakota's customers in 2020; 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, 2020, 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/2020/south-dakota/hanson-county