The distinctive characteristics of this bridge include its long span lengths, slim profile of the box girder, horizontally curved alignment, cantilevered bridge deck, and the single-column round bents. The Big River bridge's main span is 191 feet, with the end spans each measuring 156 feet. While this main span was not the longest box girder built by the California Division of Highways in the postwar period, it is a significant departure from the most common span lengths of between 150 and 160 feet. Box girders with slim profiles and a depth ratio below 5.5 percent are considered to have significance in the area of aesthetics, based on previous evaluations of California box girder bridges. The slim profile of the superstructure, with a ratio of 4.7 percent, combined with the curved alignment, cantilevered bridge deck, and the single-column bents combine to show a high value toward the mid-20th century aesthetics of the bridge. The bridge reflects these aesthetics with form following function in the designs of sleek horizontal curve, simplicity, and clean lines.