About
MnDOT has partnered with the City of Henderson, Sibley County and Le Sueur County to conduct a flood feasibility study. This feasibility study will evaluate the bridges and approach roads over the Minnesota River for Hwy 19, Hwy 93, and Sibley County Road 6 to determine what capital improvements would be necessary to minimize road closures and/or add capacity due to flooding events for the existing river crossings and their approach roads.
Study results
Goal
Provide a safe and accessible, 10-ton route into and out of Henderson to limit the length of detours and impacts to businesses during high water events.
Need
During 100-year flood events, access to the city of Henderson is severely restricted, necessitating lengthy detours and impacting local businesses and regional traffic.
Objectives
- Study alternatives that would raise the three routes that serve Henderson that are susceptible to seasonal flooding of the Minnesota River (Hwy 19, Hwy 93 and CR 6)
- Include an additional alternative that would stabilize the Hwy 19 roadbed to act as a low-head dam
- Look for better detour route
- Look at traffic, environmental impacts, costs, benefit-cost, feasibility, geotechnical and schedule