County annual report · FIPS 46011
2018 Brookings County, SD Power Outage Report
In 2018, customers in Brookings County, SD went without power for an average of 0.6 hours, a total of 12K customer-hours (South Dakota average 1.1 hours). That ranks 13th worst of 30 South Dakota counties and 2451st 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 Brookings County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 14, 2018 14:00 | July 14, 2018 16:15 | 2h 15m | 550 | 1,087 |
| 2 | June 6, 2018 13:45 | June 7, 2018 20:45 | 1d 7h | 186 | 263 |
| 3 | May 30, 2018 20:00 | May 30, 2018 22:45 | 2h 45m | 183 | 321 |
| 4 | January 10, 2018 18:15 | January 24, 2018 00:45 | 13d 6h | 182 | 730 |
| 5 | August 7, 2018 18:00 | August 8, 2018 19:00 | 1d 1h | 176 | 244 |
| 6 | July 12, 2018 13:30 | July 12, 2018 21:30 | 8h | 171 | 253 |
| 7 | November 15, 2018 16:45 | November 15, 2018 18:30 | 1h 45m | 171 | 298 |
| 8 | June 2, 2018 07:00 | June 2, 2018 08:00 | 1h | 168 | 147 |
| 9 | September 25, 2018 16:00 | October 2, 2018 23:30 | 7d 7h | 140 | 299 |
| 10 | April 27, 2018 17:00 | May 24, 2018 11:00 | 26d 18h | 137 | 1,565 |
Outage episodes by size in 2018: 13 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 Brookings 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 |
| Sioux Valley SW Elec Coop | 2018 | 4.0 hrs | 3.62 | 2.0 hrs | 2.88 |
| H-D Electric Coop Inc | 2018 | 2.6 hrs | 1.52 | 1.6 hrs | 1.14 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Kingsbury Electric Coop, Inc | - | - | - | - | - |
| City of Arlington - (SD) | - | - | - | - | - |
| City of Aurora - (SD) | - | - | - | - | - |
| City of Brookings - (SD) | - | - | - | - | - |
| City of Volga - (SD) | - | - | - | - | - |
| City of White - (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 ÷ 19,030 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. Brookings County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Brookings 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/brookings-county