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| Keywords: Lock 40 on C and O from NPS.jpg en Lock 40 NPS site says Lock 40 is a gray-blue limestone lock with a 6' lift it conforms to standard dimensions A portion of the upper berm lock gate and balance beam remain on the floor of the lock The gate has two wicket gates at its base The gate was creosoted which has aided its lasting power Early movement of the lock walls is indicated by extensive cutting back of the face stones of the lock side walls particularly on the berm side Evidence points to a wood timber foundation National Park Service http //www hscl cr nps gov/insidenps/report asp STATE PARK CHOH STRUCTURE SORT RECORDNO 514 National Park Service Dept of Interior US Government Chesapeake Ohio Canal National Historical Park Locks water transport PD-USGov | ||||
