Prison Laborers

Cahaba River Bridge (Jefferson County, Alabama)
Abandoned closed-spandrel arch bridge over Cahaba River on Abandoned road
Abandoned

Puentelevadizo Caño Martín Peña (San Juan, Puerto Rico)
Erection, 1913
Deck plate girder drawbridge over Caño Martín Peña on Route 1
Replaced by a new bridge