According to the Library of Congress, the records in the Historic American Engineering Record (HAER) "were created for the U.S. Government and are considered to be in the public domain."
2006-03-03 23:48 Gws57 640×515× (57892 bytes) VIEW OF THE B & O RAILRAOD'S LIFT BRIDGE (NEAR) AND THE ADJACENT ST. CHARLES AIRLINE RAILROAD'S BASCULE BRIDGE (BEYOND); LOOKING SOUTHEAST HAER ILL, 16-CHIG, 112-2
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