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| Keywords: Lock74onCandOCanal From NPS.jpg en Lock 74 NPS site says Lock 74 is a standard cut stone lift lock It was built to the 1836 specifications and is typical to that standard A stone wall on the towpath side extends 100' downstream The stone for the lock is gray limestone except for the coping stones which have a pebble finish of sand stone Concrete has been used as a replacement for the berm side coping The upper extension walls continue for 4' splay out at about 60 degrees then continue for about 13' The towpath slopes down 6 to the towpath side of the upper canal for 12' as a result of the thinning of the coping stones The upper berm the wall returns on itself at the end of the splayed wing It run backs 6 ' at the start of the river side of the by-pass flume The lower extension walls run for about 13' splays out at about 60 degrees for about 15' where the towpath side meets the canal side The berm makes another turn to run for 3 � perpendicular to the lock then drops 30 and continues 13' until the exit of the flume; it rises again to the lock height for 4 � and is met by a canal berm bank retaining wall The lock had a drop gate at the brest wall section of the upper end of the gate pockets that have been removed River Road crosses the lock on a steel bridge National Park Service http //www hscl cr nps gov/insidenps/report asp STATE PARK CHOH STRUCTURE SORT RECORDNO 1092 National Park Service Dept of Interior US Government Chesapeake Ohio Canal National Historical Park Lock 74 Locks water transport PD-USGov | ||||
