Did man-made modifications to Conewago Canal and Tennessee–Tombigbee Waterway assist in navigating these passages?
Conewago Canal:  Two lift locks overcame 19 ft of elevation between the ends of the canal, and a guard lock blocked unwanted water, particularly during floods. Conewago Canal:  Cargo could go upstream as well as down. Conewago Canal:  A boat going upriver could navigate the canal in 37 minutes compared to the whole day it would take 30 or 40 men to pull it upriver along the bank. Tennessee–Tombigbee Waterway:  The Tennessee–Tombigbee Waterway links commercial navigation from the nation’s midsection to the Gulf of Mexico. Tennessee–Tombigbee Waterway:  The major features of the waterway are 10 locks and dams, a 175 ft deep cut between the Tombigbee River watershed and the Tennessee River watershed, and 234 mi of navigation channels.
yes