Hwy 169 Mankato - St. Peter flood mitigation in 2016
The project includes raising the grade in four flood-prone areas (Hiniker Mill, 7-mile Creek, Old River Road, and State Hospital) to raise the road above the 100 year flood, six miles of resurfacing for a smoother road and a median barrier to prevent head-on crashes. The $25 million project received a $9.8 million grant from the EDA.
Constructing the project requires MnDOT to close Hwy 169 from Mankato to St. Peter. The narrow terrain between the bluff and the Minnesota River makes it difficult to rebuild the road under traffic in one season and carrying two-way traffic comes with other safety issues.
Nicollet County Road 13/Hwy 99 will be the detour route (PDF) with Hwy 22 as an alternate route. MnDOT has completed safety improvements to each of these routes in anticipation of the added traffic in 2016.
2016 Traffic Impacts
- February to May - single lane closures
- May to September - Nicollet CR 13/Highway 99 will be the detour route with Highway 22 as an alternate route.
- September to October - single lane closures