Folsom's historic truss bridge served as a sturdy means of
transporting pedestrians, cattle, and small vehicles, the
expanded use of he automobile rendered the truss bridge inefficient
and outdated. It was determined that a more sturdy
and wider bridge needed to be built in Folsom across the American
River. The Rainbow Bridge was built in 1919, which sealed the
fate of the truss bridge (at least temporarily).
Bridge provided a two-lane crossing that could carry heavy vehicles.
This is a very attractive bridge with its underside arches. It
served the area before the Folsom Dam was built, in 1955, to control
the raging winter torrents of the American River. It survived
floodwaters and still serves the area, though now in a secondary
capacity, and is as beautiful as ever. Even with the much needed
Lake Natoma Crossing now fully functional, the Rainbow Bridge
continues to serve as an everlasting symbol of Folsom.