Stillwater Bridge St. Croix River is between Stillwater, Minnesota and Houlton Wisconsin. It formerly connected Minnesota State Highway 36 and Wisconsin Highway 64. Around 18.000 vehicles crossed the bridge daily. A mile-long with a spectacular views St. Croix Crossing bridge was open 5 August 2017, with a total cost of $624.3 million to $646.8 million. The new bridge is a world-class design that does this beautiful river valley proud.