The Upper Midwest Environmental Sciences Center has collected bathymetric data through funding from the Long Term Resource Monitoring Program since 1989.

An overview of the bathymetry mapping conducted by UMESC can be found in the Project Status Report "Bathymetry Data for the Upper Mississippi River" (.pdf format) .
Bathymetric data are collected with an automatic survey system and processed in a Geographical Information System (GIS). Through interpolation the individual points of water depth are converted into a water depth map.

GIS data are downloadable through UMESC's Navigation Pool Data web pages.