Most of the locks were 184 feet long and 36 feet wide, able to handle boats up to 160 feet long. The sandstone locks (along with wood miter gates, rock-filled timber-crib dams and bypass canals with guard gates) created a slackwater navigation system stretching over 90 miles.
Navigation System

YearAdded:
Image Credit: Courtesy Flickr/gb_packards (CC BY-ND 2.0)Image Caption: Muskingum River LockEra_date_from: 1837
2000