County annual report · FIPS 46011
2017 Brookings County, SD Power Outage Report
In 2017, customers in Brookings County, SD went without power for an average of 0.1 hours, a total of 1,566 customer-hours (South Dakota average 0.8 hours). That ranks 22nd worst of 26 South Dakota counties and 2584th of 2,786 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in Brookings 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 | December 1, 2017 17:00 | December 6, 2017 13:45 | 4d 20h | 174 | 1,015 |
| 2 | November 28, 2017 22:30 | December 1, 2017 16:15 | 2d 17h | 61 | 257 |
| 3 | December 12, 2017 14:30 | December 12, 2017 19:15 | 4h 45m | 4 | 17 |
| 4 | December 18, 2017 16:00 | December 19, 2017 21:00 | 1d 5h | 4 | 35 |
| 5 | November 21, 2017 00:00 | November 22, 2017 08:15 | 1d 8h | 3 | 65 |
| 6 | November 22, 2017 10:45 | November 28, 2017 20:30 | 6d 9h | 2 | 160 |
| 7 | December 11, 2017 18:00 | December 11, 2017 21:15 | 3h 15m | 2 | 7 |
| 8 | December 7, 2017 12:45 | December 7, 2017 15:45 | 3h | 1 | 3 |
| 9 | December 7, 2017 23:15 | December 7, 2017 23:45 | 30m | 1 | 1 |
| 10 | December 20, 2017 20:15 | December 20, 2017 21:45 | 1h 30m | 1 | 2 |
Outage episodes by size in 2017: 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 Brookings 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 |
| Sioux Valley SW Elec Coop | 2017 | 2.3 hrs | 1.61 | 88 min | 1.43 |
| H-D Electric Coop Inc | 2017 | 3.4 hrs | 2.61 | 65 min | 0.88 |
| 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 n/a of South Dakota's customers in 2017; 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, 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/brookings-county