Two years after McCook Lake disaster, Corps of Engineers agrees to help with new flood-control plan

By: Joshua Haiar

Outlets: South Dakota Searchlight

Published: September 15, 2026

Words: 380

Last Updated: 2 days, 18 hours ago


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The U.S. Army Corps of Engineers and several local governments are partnering to study ways of better protecting the lower Big Sioux River area from high water, including the McCook Lake community that was devastated by flooding in 2024.

The Big Sioux River empties into the Missouri River at Sioux City, where the borders of South Dakota, Nebraska and Iowa meet. The feasibility study will examine whether improvements to the existing flood-control plan could better …

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