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Keywords: Lock 43 on C and O from NPS.jpg en Lock 43 NPS site says Lock 43 has a 9' lift and a 15' wide clearance The upper two courses were removed and replaced with concrete in 1921 National Park Service http //www hscl cr nps gov/insidenps/report asp STATE PARK CHOH STRUCTURE SORT RECORDNO 568 National Park Service Dept of Interior US Government Chesapeake Ohio Canal National Historical Park Locks water transport PD-USGov |