Lock and Dam No. 14 is a lock and dam located near LeClaire, Iowa on the Upper Mississippi River above Davenport, Iowa and Moline, Illinois. The movable portion of the dam is 1,343 feet long and consists of 13 tainter gates and 4 roller gates. Connected to it is a 1,127 feet long non-submersible rock fill dike which extends to the Illinois side. The main lock is 110 feet wide by 600 feet long. The site on the National Register of Historic Places as the Lock and Dam No.