Coralville Lake now operating under updated Water Control Plan

Rock Island District
Published March 31, 2022
Coralville Lake Overview

Coralville Lake Overview

The U.S. Army Corps of Engineers, Rock Island District, is now managing Coralville Lake under operational parameters outlined in a recently approved updated Water Control Plan. This plan was the result of a feasibility study initiated to update the Iowa River Basin Master Reservoir Regulation Manual. The Water Control Plan consists of operational parameters defining how, and when, water is stored and released. It includes a schedule of releases, conservation pool levels to be maintained during non-flood or drought conditions, and downstream water level constraints.

The new plan is identical to the information presented during the virtual public meetings held in February and March 2021. To view the final report and the updated regulation schedules for Coralville Lake, please visit:

For more information, contact the Coralville Lake Project Office at 319-338-3543 or visit:

Corporate Communications

Release no. 22-005