US Army Corps of Engineers
Rock Island District Website


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Federal funds and state in-kind services.
This is a project done in partnership with and at the request of the Illinois Department of Natural Resources, Office of Water Resources.

Over the course of the project surveyors will be sent to your community and onto and around your property to survey and document your property’s potential flood risk. Surveyors will be clearly marked and will carry ID, they will bring surveying equipment with them. They will also be using photography equipment around your property to assist with the creation of a structural flood risk inventory. There will be no impacts to your utility services.

Surveyors will be acquiring first floor (front door sill), lowest entry (window vent or crawl space) and typical ground elevations on your property. This specific information will help estimate the potential flood threat and damages to your home or business.

A Flood Risk Assessment aims to create information in order to better understand and estimate the real impacts of different flooding events. This project will map and analyze flood damage risk on a structure by structure basis. Structure specific survey information will help estimate the amount of risk an area could face in the event of a flood. This Risk Assessment will send surveyors in and around your community to map and document properties in the floodplain, and their potential risk for flood damages.

Check the “Schedule” portion of this page for regular updates on when to expect surveyors in your community.

If you have any questions about the Flood Risk Assessment project, including timeline, logistics, or impacts on you and your community please call (309) 794-5729.

The analyses of potential flood losses is a function of the type of structure. The photo helps insure proper interpretation of the assessor’s data and the surveyed elevations.

The impacts of flooding vary greatly from extreme events that cause severe damage across communities to smaller flooding events that cause nuisance flooding more frequently. Estimating the depth of inundation for different scenarios can help community planners and homeowners determine the best solution for flooding issues.

At this time the information will only be shared with state and local officials, primarily for mitigation planning purposes. After the study is complete you can request the information from your community floodplain manager.

The data collected is not to the standards required for use on an Elevation Certificate, however the information can be used as a screening process for properties where it would be appropriate to obtain an EC.

No, the information developed will provide local and state officials with information on risk associated with flooding.


All assessments are now complete.

Contact Us

For more information contact the Rock Island District Corporate Communications Office at 309-794-5729.

Upper Mississippi River - Illinois Flood Risk Assessment

This inter-agency pilot project produced map products to provide risk communication for Illinois Mississippi riverfront communities. Structural flood damage assessments for all structures were developed using multi-frequency flood depth grids. Survey data was collected for the lowest entry point and first floor elevation for all residential, commercial and industrial structures within the 1% annual chance exceedance floodplain. Parcel data, GIS data, and elevation certificate data that have been prepared for structures in the floodplain was obtained from county assessors.

Project Benefits

Raised Flood Risk Awareness and Flood Risk Action:

Data collected during this project is being used to inform residents of the specific flood risk to their home or business and provides valuable planning data for flood risk mitigation and emergency management planners. Maps were prepared for mitigation action illustrating high risk areas based on potential losses and populations at risk.

Reduced/Managed Flood Risk:

As a result of this project, state, county and local community officials now have access to enhanced flood risk information and tools to assist with community communication and decision making processes regarding land-use and future development in high risk flood areas. Information shared with these river communities has been used to inform and educate citizens about about flood risk and has yielded immediate life safety and resiliency benefits as well as improved planning for the future.

Assessment Locations

Areas marked in red have been surveyed as part of this project.