Keywords: Dumbarton Bridge1.jpg Photo of Dumbarton Railroad Bridge taken Sunday September 2 2007 from kayak This bridge is the southernmost bridge across the San Francisco Bay No longer used for rail traffic the bridge has been left in the open position A diesel engine would rotate the bridge on a large gear when a boater signaled the bridge operator Transferred from http //en wikipedia org en wikipedia 2007-09-03 Original uploader was Howardpaul2 at http //en wikipedia org en wikipedia Released into the public domain by the author en wikipedia Howardpaul2 Original upload log page en wikipedia Dumbarton_Bridge1 jpg 2007-09-03 03 44 Howardpaul2 1589×785× 128170 bytes <nowiki>Photo of Dumbarton Railroad Bridge taken Sunday September 2 2007 from kayak </nowiki> Dumbarton Rail Bridge |