Work begins Monday on the first phase of construction in preparation for the Highway 169 levee project, which will start in late August.
The Highway 169 at Highway 14 crossover will see an overhaul of the roadway with new resurfacing of the pavement and lane modifications to accommodate traffic during the levee project.
MnDOT District 7 Construction Project Engineer Dan Swanson says due to phasing, the crossover project had to be done separate from construction of the levee.
“It’ll be just one phase for this. It will be inside lane closures on 169, just north of the Highway 14 interchange. Then it will be a three-week process, they’ll be doing a removal of grading in the median there to allow for head-to-head traffic come the time of the levee. Then they’ll build the levee half-and-half, so they’ll build northbound and then they’ll build southbound.”
In late August, MnDOT will raise the grade of Highway 169 by three feet to bring the levee up to current FEMA standards.
“It’s roughly a 15-hundred foot section of road they’re removing, both northbound and southbound. There will be periodic ramp closures and minor detours as well. That should roughly a two-month project that starts after the crossover, which is about a one-month project.”
Mankato and North Mankato were informed in 2016 that FEMA was in the process of updating Flood Maps and discovered a small portion of the levee on Highway 169 did not protect portions of Mankato and lower North Mankato from the 100-year base flood.