County annual report · FIPS 46079
2017 Lake County, SD Power Outage Report
In 2017, customers in Lake County, SD went without power for an average of 4.8 hours, a total of 39K customer-hours (South Dakota average 0.8 hours). That ranks 1st worst of 26 South Dakota counties and 984th of 2,786 nationally.
Compared with SD, the US and 2016
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Lake County, 2017
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 2, 2017 09:45 | October 2, 2017 20:45 | 11h | 4,106 | 20K |
| 2 | November 8, 2017 15:45 | November 8, 2017 22:00 | 6h 15m | 2,421 | 11K |
| 3 | October 2, 2017 08:15 | October 2, 2017 09:00 | 45m | 2,409 | 615 |
| 4 | October 3, 2017 06:15 | October 4, 2017 02:00 | 19h 45m | 783 | 2,839 |
| 5 | October 21, 2017 16:00 | October 21, 2017 16:30 | 30m | 783 | 196 |
| 6 | July 4, 2017 19:45 | July 5, 2017 00:15 | 4h 30m | 534 | 2,214 |
| 7 | July 11, 2017 22:45 | July 12, 2017 04:45 | 6h | 512 | 776 |
| 8 | May 13, 2017 12:30 | May 13, 2017 15:30 | 3h | 134 | 369 |
| 9 | July 31, 2017 19:15 | August 1, 2017 01:15 | 6h | 117 | 239 |
| 10 | June 22, 2017 00:45 | June 22, 2017 01:45 | 1h | 80 | 21 |
Outage episodes by size in 2017: 9 reached 100+ customers, 3 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 2017, 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 | 2017 | 2.4 hrs | 2.12 | 2.0 hrs | 2.00 |
| Northern States Power Co - Minnesota | 2017 | 1.6 hrs | 0.73 | 58 min | 0.61 |
| Sioux Valley SW Elec Coop | 2017 | 2.3 hrs | 1.61 | 88 min | 1.43 |
| 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 2017; 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, 2017, 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/2017/south-dakota/lake-county