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- Chain_of_Rocks_Lock abstract "Chain of Rocks Lock, also known as Locks No. 27, is a lock situated at 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 3 miles (4.8 km) southeast on the Chain of Rocks canal. The canal and locks allow river traffic to bypass a portion of the river that is unnavigable in low water due to an anticlinal exposure of bedrock in the river—a "chain of rocks".The 1,200-foot (370 m) main lock and 600-foot (180 m) auxiliary lock were built in the late 1940s and early 1950s to allow a by-pass of the Chain of Rocks lying in the main channel of the Mississippi River. This stretch of river in low water seasons was treacherous for commercial tow boats and barges, often requiring them to wait several days for the river to rise. The dam for lock 27 is atypical for the Mississippi, being a weir made of tons of rock laid in the Mississippi to create a small pool elevation upstream from the Chain of Rocks. The drop at Locks 27 can vary from a few feet to over a ten foot drop depending on the river stage.The Chain of Rocks Lock is operated by the St. Louis District of the U.S. Army Corps of Engineers. Locks No. 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.".
- Chain_of_Rocks_Lock location Granite_City,_Illinois.
- Chain_of_Rocks_Lock location Illinois.
- Chain_of_Rocks_Lock location Madison,_Illinois.
- Chain_of_Rocks_Lock location United_States.
- Chain_of_Rocks_Lock openingYear "1953".
- Chain_of_Rocks_Lock operator United_States_Army_Corps_of_Engineers.
- Chain_of_Rocks_Lock river Upper_Mississippi_River.
- Chain_of_Rocks_Lock thumbnail Mississippi_River_Lock_number_27.jpg?width=300.
- Chain_of_Rocks_Lock wikiPageExternalLink 05Dam%2027.pdf.
- Chain_of_Rocks_Lock wikiPageID "7444928".
- Chain_of_Rocks_Lock wikiPageRevisionID "624372497".
- Chain_of_Rocks_Lock after "no further locks and dams".
- Chain_of_Rocks_Lock before Melvin_Price_Locks_and_Dam.
- Chain_of_Rocks_Lock damCrosses Upper_Mississippi_River.
- Chain_of_Rocks_Lock damOperator United_States_Army_Corps_of_Engineers.
- Chain_of_Rocks_Lock hasPhotoCollection Chain_of_Rocks_Lock.
- Chain_of_Rocks_Lock id "il0557".
- Chain_of_Rocks_Lock imageCaption "Lock number 27.".
- Chain_of_Rocks_Lock location Granite_City,_Illinois.
- Chain_of_Rocks_Lock location Illinois.
- Chain_of_Rocks_Lock location Madison,_Illinois.
- Chain_of_Rocks_Lock location United_States.
- Chain_of_Rocks_Lock nameOfficial "Locks No. 27".
- Chain_of_Rocks_Lock opening "1953".
- Chain_of_Rocks_Lock survey "IL-33".
- Chain_of_Rocks_Lock title "Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite City, Madison County, IL".
- Chain_of_Rocks_Lock subject Category:Buildings_and_structures_in_Madison_County,_Illinois.
- Chain_of_Rocks_Lock subject Category:Dams_on_the_Mississippi_River.
- Chain_of_Rocks_Lock subject Category:Historic_American_Engineering_Record_in_Illinois.
- Chain_of_Rocks_Lock subject Category:Mississippi_River_locks.
- Chain_of_Rocks_Lock subject Category:Mississippi_Valley_Division.
- Chain_of_Rocks_Lock subject Category:Rock-filled_dams.
- Chain_of_Rocks_Lock subject Category:Transport_infrastructure_completed_in_1953.
- Chain_of_Rocks_Lock type Artifact100021939.
- Chain_of_Rocks_Lock type Barrier102796623.
- Chain_of_Rocks_Lock type Dam103160309.
- Chain_of_Rocks_Lock type Object100002684.
- Chain_of_Rocks_Lock type Obstruction103839993.
- Chain_of_Rocks_Lock type PhysicalEntity100001930.
- Chain_of_Rocks_Lock type Structure104341686.
- Chain_of_Rocks_Lock type Whole100003553.
- Chain_of_Rocks_Lock type YagoGeoEntity.
- Chain_of_Rocks_Lock type YagoPermanentlyLocatedEntity.
- Chain_of_Rocks_Lock type ArchitecturalStructure.
- Chain_of_Rocks_Lock type Dam.
- Chain_of_Rocks_Lock type Infrastructure.
- Chain_of_Rocks_Lock type Place.
- Chain_of_Rocks_Lock type Location.
- Chain_of_Rocks_Lock type Place.
- Chain_of_Rocks_Lock type Thing.
- Chain_of_Rocks_Lock type Q12323.
- Chain_of_Rocks_Lock comment "Chain of Rocks Lock, also known as Locks No. 27, is a lock situated at 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 3 miles (4.8 km) southeast on the Chain of Rocks canal.".
- Chain_of_Rocks_Lock label "Chain of Rocks Lock".
- Chain_of_Rocks_Lock label "Chain of Rocks Lock".
- Chain_of_Rocks_Lock sameAs Chain_of_Rocks_Lock.
- Chain_of_Rocks_Lock sameAs m.0261ylf.
- Chain_of_Rocks_Lock sameAs Q1059078.
- Chain_of_Rocks_Lock sameAs Q1059078.
- Chain_of_Rocks_Lock sameAs Chain_of_Rocks_Lock.
- Chain_of_Rocks_Lock wasDerivedFrom Chain_of_Rocks_Lock?oldid=624372497.
- Chain_of_Rocks_Lock depiction Mississippi_River_Lock_number_27.jpg.
- Chain_of_Rocks_Lock isPrimaryTopicOf Chain_of_Rocks_Lock.
- Chain_of_Rocks_Lock name "Locks No. 27".