Rock Island District Header Image


Home > About > Offices > Programs and Project Management > Des Moines River Water Control Plan Update

Des Moines River Water Control Plan Update

The U.S. Army Corps of Engineers (USACE), Rock Island District is proposing to update the Des Moines River Regulation Manual which would include the Water Control Manual for both Saylorville Lake and Lake Red Rock. The District proposed a reservoir study incorporating Saylorville, Red Rock and Coralville Reservoirs in July 2010. The results of the 2010 Des Moines River Regulated Flow Frequency Study demonstrated a need to expand the study scope to include Southeast Des Moines and Des Moines levee systems for Flood Risk Management in Des Moines, Iowa. The updated scope of the project consists of facilitating all steps required to reevaluate and update the regulation manuals for Lake Red Rock and Saylorville Lake on the Des Moines River.  

Water control manuals provide guidance for direction, operation and management of water storage for each individual project or system of projects. USACE prepares water control manuals in the early stages of each project and periodically updates the manuals in order to keep abreast of changing conditions, legislation and other relevant factors. Water control plans are contained within water control manuals for all projects under the supervision of the United States Corps of Engineers. The plans’ primary goal is to define normal operation of a water control structure. Water control plans ensure the operations of reservoirs and locks and dams conform to legislation, laws and applicable USACE rules. Water control plans are reviewed and revised every 10 years, at a minimum.


Current Plans

Water Control Plans, including regulation tables, for both Red Rock and Saylorville lakes can be viewed in the PDFs provided below.

Red Rock Water Control Plans.pdf

Saylorville Water Control Plans.pdf

Fact Sheets

Existing Water Control Plan - Dam Schematic

Saylorville Lake Water Management

Lake Red Rock Water Management

Update Timeline

The Des Moines River Regulation Manual revision process will begin in earnest after public scoping. A Draft is anticipated to be available in late 2017 or early 2018. Its content will then be available for public review and comment through public notice, web posting, and/or by letter/e-mail to those who attended and signed up to receive direct updates. The final Plan is anticipated to be completed in 2018.

Public Input

During the update process, the Corps invites the public to provide input. All comments need to be submitted by March 31, 2017, for consideration in the plan.

Several public scoping events were held to inform the public about the proposed updates. A video of the presentation used at these events can be found here: printable version can be found here: Des Moines River Water Control Plan Public Meeting Slides


Comment Form
(Click link above to open form)

*NOTE* If you submitted a comment using the "submit button" at the bottom of the comment form prior to March 3 please resubmit your comments by email to A glitch in our system was preventing some of the comments from coming through.

Comments or questions may be made via email to:, by phone to: (309) 794-5704 or by mail to:

Rock Island District
Attn: PM-M
P.O. Box 2004
Rock Island, IL 61204-2004