sentences:  16 is a lock and dam located near Muscatine, Iowa on the Upper Mississippi River around river mile 457.2.The movable portion of the dam is long and consists of 4 roller gates and 15 Tainter gates.The lock is wide by long with a maximum lift of 9 feet (2.7m) In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No.