The Creamery Bridge, which spans the Marais des Cygnes River at Eighth St., is one of two Marsh Arch triple span bridges located at Osawatomie. The other spans the Pottawatomie Creek at Sixth St., and both are on the National Register of Historic Places.
James B. Marsh’s patented design used rainbow arches that would expand and contract along with the bridge floor under varying conditions of moisture and temperature. The Creamery Bridge, built in 1930, has a rainbow span reaching 140 feet into the air at its highest point. The Pottowatomie Creek Bridge was built in 1932, reaches 120 feet into the air, and contains 1,500 cubic yards of concrete and 313,000 pounds of steel. These are two of only eight Marsh Arch triple span bridges remaining in Kansas.