This is a photo of a single arch on Boyd and Jenkins. the pair are identical, but this shows more detail.
Carl Albert Center, Elmer Thomas Collection, Series 13, Box 8, Folder 8
Carl Albert Center
Is part of the Carl Albert Center
Is part of the Elmer Thomas Collection
Still Image Item Type Metadata
Thomas, Elmer, 1876-1965, “Single Arch,” Making Modern America, accessed August 21, 2017, http://newdeal.oucreate.com/items/show/336.