Lock number 27.

Chain of Rocks Lock, also known as Locks No. 27, is a lock situated on the southern end of Chouteau Island near St. Louis, Missouri on the Upper Mississippi River. Its associated dam is just downstream of the Chain of Rocks Bridge and the lock is located over three miles south east, on the Chain of Rocks canal bypassing an unnavigable portion of the river. Canal locks in England. ... This article or section does not cite its references or sources. ... See also: Mississippi River The Upper Mississippi River is the portion of the Mississippi River upstream of Cairo, Illinois. ... The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest river in the United States; the longest is the Missouri River, which flows into the Mississippi. ... The Chain of Rocks Bridge is a 5,350 feet long bridge spanning the Mississippi River on the north edge of St. ...

Lock No. 27 and the Chain of Rocks canal take traffic around this "chain of rocks", an exposure of bedrock in the river north of St. Louis. The low water dam runs on the right of the image starting at the round sheet pile cells at bottom left.

The Chain of Rocks Lock is operated by the St. Louis District of the U.S. Army Corps of Engineers. Locks #27 are the southernmost locks on the Mississippi River and they are the only Locks south of the confluence of the Mississippi River and Missouri River. As such, the Locks move more cargo than any other navigation structure on the Mississippi River. Image File history File linksMetadata Download high resolution version (683x1024, 648 KB) Summary Geological River Break, Mississippi River, Chain of Rocks, Missouri. ... Image File history File linksMetadata Download high resolution version (683x1024, 648 KB) Summary Geological River Break, Mississippi River, Chain of Rocks, Missouri. ... United States Army Corps of Engineers logo The United States Army Corps of Engineers, or USACE, is made up of some 34,600 civilian and 650 military men and women. ... The Missouri River is a tributary of the Mississippi River in the United States. ...

See also

• Chain of Rocks Bridge
• New Chain of Rocks Bridge

The Chain of Rocks Bridge is a 5,350 feet long bridge spanning the Mississippi River on the north edge of St. ... The New Chain of Rocks Bridge is a pair of bridges across the Mississippi River on the north edge of St. ...

External links

• U.S. Army Corps of Engineers
• HAER - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite City, Madison County, IL

Coordinates: 38°42′11″N, 90°10′51″W See also: Mississippi River The Upper Mississippi River is the portion of the Mississippi River upstream of Cairo, Illinois. ... Aerial view of Saint Anthony Falls with the upper dam; there is also a lower dam. ... Aerial view of Saint Anthony Falls with the upper dam; there is also a lower dam. ... Lock and Dam No. ... Lock and Dam No. ... Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 1. ...