Sections of Lower Michigan Street and Michigan Street in Duluth will be closed to traffic between 21st and 23rd avenues west beginning Monday.

Contractors will be installing pieces for a new sanitary lift station that's being relocated to accommodate the Twin Ports Interchange project, according to a news release from the city.

During the project, only local traffic will be allowed to pass through. Signs will be put up to reroute traffic. Pedestrians using the Cross City Trail parallel to Michigan Street will be directed to a route on Superior Street and 20th Avenue West.