The Arizona Highway Department (AHD) began a major improvement in what was then known as the Holbrook-Lupton Highway, running between the state line with New Mexico to Adamana.

Based upon engineering drawings by AHD, the Monarch Engineering Company, based in Denver, Colorado, was awarded the contract for the Sanders Bridge.

However, in 1931, after another realignment of the highway system, the Sanders Bridge, along with the one at Allentown, were no longer included on Route 66.

Currently, it carries local traffic on the Navajo NationNavajo Indian Reservation.

The superstructure consists of a riveted steel, 6-panel Pratt pony truss.