Development of the UMRS Hydraulic Model Phase I was completed in January 2018 and was a collaborative effort by federal and state agencies, facilitated by USACE Rock Island and St. Louis Districts. It covers 320 river miles of the Mississippi River from Lock and Dam 19 at Keokuk, Iowa, (River Mile 364) to Thebes, Illinois, (River Mile 44) and used the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) software. It includes detailed features, cross sections, and represents the entire floodplain from bluff to bluff.
In fiscal year 2020, funding in the amount of $575,000 has been approved through Floodplain Management Services (FPMS) for the development of the remainder of the hydraulic models for the Upper Mississippi River. This includes UMRS Hydraulic Model Phases II and IV which cover a total of 500 river miles. Phase II stretches from Lock and Dam 10 at Guttenberg, Iowa, (River Mile 615) to Lock and Dam 19 at Keokuk, Iowa, (River Mile 364) and Phase IV covers the area from Anoka, Minnesota, (River Mile 860) to Lock and Dam 10 at Guttenberg, Iowa, (River Mile 615).
Funding for Phase III of the project, which includes 290 miles of the Illinois Waterway, is anticipated in future budget cycles.