Alton Lock and Dam

E379465

Alton Lock and Dam is a major navigation and flood-control structure on the Mississippi River that helps regulate river traffic and water levels as part of the Illinois Waterway system.

All labels observed (1)

Label Occurrences
Alton Lock and Dam canonical 1

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf flood-control structure
lock and dam
navigation structure
alsoKnownAs Lock and Dam No. 26 (replacement)
auxiliaryLockLength 600 ft
auxiliaryLockWidth 110 ft
constructionStartDate 1935
coordinates 38.890°N 90.184°W
country United States of America
surface form: United States
damType roller-gate dam
function regulates river traffic
regulates water levels
hasHeritageDesignation National Register of Historic Places
hasPart Alton Dam
Alton Lock
auxiliary lock
main lock
roller gates
spillway
inception 1938
locatedAtRiverMile 203
locatedDownstreamFrom Lock and Dam No. 25
locatedInOrNextToBodyOfWater Mississippi River
locatedInTheAdministrativeTerritorialEntity Madison County, Illinois NERFINISHED
St. Charles County, Missouri
locatedNear Alton, Illinois
locatedUpstreamFrom Chain of Rocks Lock and Dam
mainLockLength 1200 ft
mainLockWidth 110 ft
maintainedBy U.S. Army Corps of Engineers
surface form: United States Army Corps of Engineers
nearbyCity Alton, Illinois
West Alton, Missouri
NRHPListingDate 2004
numberOfLocks 2
openingDate 1938
operatedBy U.S. Army Corps of Engineers
surface form: United States Army Corps of Engineers St. Louis District
partOf Illinois Waterway system
surface form: Illinois Waterway

Upper Mississippi Valley
surface form: Upper Mississippi River system
purpose flood control
navigation
water level regulation
replaced original Lock and Dam No. 26 at Alton
river Mississippi River
state Illinois
Missouri
usedFor commercial barge traffic
recreational boating
waterwaySystem Illinois Waterway system
surface form: Illinois Waterway

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Illinois Waterway system hasPart Alton Lock and Dam