County annual report · FIPS 46079
2018 Lake County, SD Power Outage Report
In 2018, customers in Lake County, SD went without power for an average of 0.0 hours, a total of 299 customer-hours (South Dakota average 1.1 hours). That ranks 28th worst of 30 South Dakota counties and 2711th 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 Lake County, 2018
The 8 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 3, 2018 22:45 | October 4, 2018 00:15 | 1h 30m | 180 | 270 |
| 2 | April 14, 2018 13:45 | April 14, 2018 19:00 | 5h 15m | 2 | 11 |
| 3 | April 27, 2018 15:45 | April 27, 2018 16:45 | 1h | 1 | 1 |
| 4 | May 29, 2018 13:15 | May 29, 2018 18:15 | 5h | 1 | 5 |
| 5 | May 29, 2018 23:15 | May 30, 2018 01:15 | 2h | 1 | 2 |
| 6 | May 30, 2018 14:15 | May 30, 2018 18:15 | 4h | 1 | 4 |
| 7 | August 12, 2018 04:45 | August 12, 2018 09:00 | 4h 15m | 1 | 4 |
| 8 | December 7, 2018 15:00 | December 7, 2018 16:45 | 1h 45m | 1 | 2 |
Outage episodes by size in 2018: 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 Lake 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 |
|---|---|---|---|---|---|
| Otter Tail Power Co | 2018 | 1.8 hrs | 1.30 | 1.7 hrs | 1.23 |
| Northern States Power Co - Minnesota | 2018 | 90 min | 0.73 | 69 min | 0.62 |
| Sioux Valley SW Elec Coop | 2018 | 4.0 hrs | 3.62 | 2.0 hrs | 2.88 |
| 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 46% of South Dakota's customers in 2018; 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, 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/lake-county