Luten Bridge Company, actually a company licensed to build Luten Arch bridges in Knoxville TN, existed in the first half of the 20th century (so long gone, now). The earliest Luten Arch I’ve seen is up north of Pennington Gap…here. It’s a 1918 bridge.
This one, in the Wallins Creek Community in Kentucky, spans Laurel Creek. It’s 1929 vintage. 36.82482, -83.41535
Blogging the Railroad Tunnels 