The Colorado Street Bridge was designed and built in 1912 at a total cost of $191,000 (equivalent to $4,566,867 in 2016). The bridge was designed by the firm of Waddell & Harrington , based in Kansas City , Missouri . The structure carries Colorado Boulevard (then called "Colorado Street"), the major east-west thoroughfare connecting Pasadena with Eagle Rock and Glendale to the west, and with Monrovia to the east. It spans 1,486 feet (453 m) and is notable for its distinctive Beaux Arts arches, light standards, and railings. The bridge is on the National Register of Historic Places and has been designated a National Historic Civil Engineering Landmark by the American Society of Civil Engineers . Read More...