Harbison-Walker Refractories Company Railroad

Mt. Union Dinky Bridge (1st) (Huntingdon County, Pennsylvania)
Built by Harbison-Walker Refractories to bring materials across Juniata River from quarry; destroyed in March 1936 flooding and replaced
Lost Deck truss bridge over Juniata River on former industrial railroad
Destroyed by flooding

Mt. Union Dinky Bridge (2nd) (Huntingdon County, Pennsylvania)
Built 1936 to replace earlier bridge washed out by flood, abandoned 1950s and dismantled in stages
Lost Deck truss bridge over Juniata River, U.S. 22, and Pennsylvania Railroad
Removed but not replaced