County annual report · FIPS 46079
2023 Lake County, SD Power Outage Report
In 2023, customers in Lake County, SD went without power for an average of 1.2 hours, a total of 9,457 customer-hours (South Dakota average 2.3 hours). That ranks 43rd worst of 61 South Dakota counties and 2606th of 2,977 nationally.
Compared with SD, the US and 2022
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Lake County, 2023
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 11, 2023 05:30 | June 1, 2023 12:15 | 21d 6h | 631 | 1,420 |
| 2 | April 28, 2023 15:30 | May 5, 2023 20:45 | 7d 5h | 431 | 755 |
| 3 | December 25, 2023 14:45 | December 25, 2023 16:00 | 1h 15m | 343 | 181 |
| 4 | April 20, 2023 05:15 | April 20, 2023 07:30 | 2h 15m | 271 | 447 |
| 5 | January 9, 2023 23:45 | January 25, 2023 20:45 | 15d 21h | 244 | 1,584 |
| 6 | November 14, 2023 20:45 | November 14, 2023 21:45 | 1h | 211 | 58 |
| 7 | July 4, 2023 11:00 | July 4, 2023 14:15 | 3h 15m | 202 | 491 |
| 8 | March 30, 2023 01:15 | March 30, 2023 02:15 | 1h | 146 | 146 |
| 9 | December 17, 2023 10:30 | December 17, 2023 11:45 | 1h 15m | 145 | 147 |
| 10 | October 12, 2023 18:30 | October 12, 2023 20:45 | 2h 15m | 122 | 253 |
Outage episodes by size in 2023: 11 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 Lake County reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2023 | 2.4 hrs | 1.78 | 1.9 hrs | 1.68 |
| Northern States Power Co - Minnesota | 2023 | 1.7 hrs | 0.86 | 74 min | 0.77 |
| Sioux Valley SW Elec Coop | 2023 | 60 min | 1.46 | 60 min | 1.46 |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
| City of Madison - (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 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,064 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. Lake County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Lake County, SD annual power outage report, 2023, 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/2023/south-dakota/lake-county