County annual report · FIPS 46111
2020 Sanborn County, SD Power Outage Report
In 2020, customers in Sanborn County, SD went without power for an average of 2.6 hours, a total of 3,846 customer-hours (South Dakota average 4.6 hours). That ranks 34th worst of 62 South Dakota counties and 1998th 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 Sanborn 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 29, 2020 12:45 | October 29, 2020 13:45 | 1h | 556 | 556 |
| 2 | June 6, 2020 23:30 | June 7, 2020 02:30 | 3h | 196 | 441 |
| 3 | January 25, 2020 10:15 | January 25, 2020 14:15 | 4h | 195 | 780 |
| 4 | June 25, 2020 23:30 | June 26, 2020 02:30 | 3h | 195 | 108 |
| 5 | August 10, 2020 10:15 | August 10, 2020 12:00 | 1h 45m | 195 | 341 |
| 6 | July 31, 2020 04:00 | July 31, 2020 05:30 | 1h 30m | 125 | 129 |
| 7 | April 30, 2020 23:30 | May 1, 2020 01:00 | 1h 30m | 82 | 103 |
| 8 | June 2, 2020 18:00 | June 2, 2020 20:30 | 2h 30m | 80 | 53 |
| 9 | June 9, 2020 11:45 | June 9, 2020 23:00 | 11h 15m | 68 | 390 |
| 10 | March 15, 2020 06:00 | March 15, 2020 15:15 | 9h 15m | 54 | 31 |
Outage episodes by size in 2020: 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 Sanborn 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 | - | - | - | - | - |
| Dakota Energy Coop Inc | - | - | - | - | - |
| 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 ÷ 1,463 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. Sanborn County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sanborn 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/sanborn-county