Construction should begin soon to rebuild the interchange at Olive and Lindbergh boulevards into a “folded diamond” interchange that can accommodate traffic in all directions. The project is a key priority of the 39 North Master Plan and construction is expected to take about one year.

The St. Louis Economic Development Partnership has been administering the road project after snagging a $4 million federal grant over two years ago. On Wednesday, its board approved hiring R.V. Wagner Inc. for $4.2 million to rebuild the interchange. The south St. Louis County company was one of five bidders. St. Louis County has committed to a $1 million match in road funds for the project.