County annual report · FIPS 46079
2015 Lake County, SD Power Outage Report
In 2015, customers in Lake County, SD went without power for an average of 0.1 hours, a total of 565 customer-hours (South Dakota average 0.7 hours). That ranks 9th worst of 10 South Dakota counties and 2358th of 2,484 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Lake County, 2015
The 9 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 19, 2015 03:30 | May 19, 2015 05:45 | 2h 15m | 193 | 390 |
| 2 | June 20, 2015 08:00 | June 20, 2015 09:45 | 1h 45m | 193 | 159 |
| 3 | September 3, 2015 19:30 | September 3, 2015 20:15 | 45m | 7 | 5 |
| 4 | November 2, 2015 20:00 | November 2, 2015 21:00 | 1h | 2 | 2 |
| 5 | May 30, 2015 15:15 | May 30, 2015 19:00 | 3h 45m | 1 | 4 |
| 6 | May 30, 2015 22:30 | May 30, 2015 23:00 | 30m | 1 | 1 |
| 7 | June 22, 2015 12:30 | June 22, 2015 13:00 | 30m | 1 | 1 |
| 8 | September 1, 2015 21:00 | September 1, 2015 21:30 | 30m | 1 | 1 |
| 9 | September 1, 2015 22:30 | September 2, 2015 02:15 | 3h 45m | 1 | 4 |
Outage episodes by size in 2015: 2 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 2015, 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 | 2015 | 1.8 hrs | 3.23 | 1.8 hrs | 3.23 |
| Northern States Power Co - Minnesota | 2015 | 2.1 hrs | 0.88 | 82 min | 0.81 |
| Sioux Valley SW Elec Coop | 2015 | 2.0 hrs | 1.29 | 2.0 hrs | 1.29 |
| 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 2015; 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, 2015, 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/2015/south-dakota/lake-county