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12th street bridge in Altoona, Pa.
Baltimore and Ohio (B&O) Railroad bridge at the Augustine Cut off, Wilmington, Delaware
Old swinging bridge on the Brandywine, Wilmington, Delaware
Purification and filter plant
Steel walk for Nitrating House
Dam and footbridge at Eleutherian Mills
Illustration showing pre-bridge crossing of Brandywine at Eleutherian Mills
Suspension bridge at Eleutherian Mills
Wood footbridge at Bushkill, Pennsylvania property
Bridge at Bushkill falls