 The design of the third bridge was largely copied from the Rocky River Bridge in Cleveland, Ohio, but was built one foot (0.3 m) longer to make it the largest concrete arch in the U.S. at the time.In turn, the Rocky River Bridge was modeled after the Walnut Lane Bridge in Philadelphia, which was modeled after the Adolphe Bridge in Luxembourg.The Monroe Street bridge was designed with ornamental features such as bison skulls, covered pavilions, and a chain-link railing motif.