US Army Corps of Engineers
Rock Island District Website

Project Information Papers

Upper Mississippi River - Illinois Flood Risk Assessments

This inter-agency pilot project developed map products to provide risk communication to communities in 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.
Published: 6/11/2020