us army corps of engineers logo - white castle on red background

Illinois River Flood Study   

Study Documents

Final Report

red square with a white castle

* PDF Format (15 megabytes)


Study Presentation

* PowerPoint format

* PDF format




The Scope of the Study

The scope of the Illinois River Flood study was to identify the major contributing factors to the increased water levels in the Illinois River in northwest Arkansas and northeast Oklahoma and to provide suggestions as to what can be done to decrease the frequency and magnitude of flooding.

kayakers enjoying the Illinois River

To accomplish this, USACE partitioned the study into three components:

  1. Illinois River stream gage analysis
  2. Climatic variability and hydrology (as it relates to streamflow, precipitation, and runoff)
  3. Comprehensive hydraulic analysis

USACE is working with the Arkansas Natural Resource Division of the Arkansas Department of Agriculture to identify possible means to reduce the impacts of localized flooding in northwest Arkansas to the Illinois River. USACE hydrologists and engineers are examining urbanization in northwest Arkansas and how development can occur in ways that minimize impacts to the water flowing in the mainstem of the Illinois River.