Lock and Dam No. 22

Lock and Dam No. 22 ( lock and dam No. 22) is one of 29 dams that enable navigation on the upper Mississippi. Built in 1934-1938 by the United States Army Corps of Engineers combined building is located in Saverton in Ralls County, Missouri. On the opposite left bank of the Pike County is located in Illinois. In 2004, the Lock and Dam No. was. 22 Historic District was added to the NRHP.

Barrage

To barrage include a 487.7 m long stone dam on the Illinois side, and a 373.1 m long variable part, which consists of a ten-part segment weir and three jam rolls.

The dam height is 9 feet (2.70 m). The purpose of the weir is not the flood, but the damming of the Mississippi for navigation.

Lock

The lock is 182.9 m long and 33.5 m wide. Next to it is a second, but not finished smaller lock chamber.