Lock and Dam No. 24
| Lock and Dam No. 24 | |
|---|---|
|
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| Basic data | |
| Places: |
Clarksville , Missouri Calhoun County , Illinois |
| Geographical coordinates: | 39 ° 22 '36 " N , 90 ° 54' 30" W |
| Construction time: | 1936-40 |
| Weir | |
| Type: | Segment weir |
| Maximum storage height: | 2.7 m |
| Dam length (moving part): | 408.4 m |
| lock | |
| usable length: | 182.9 m |
| usable width: | 33.5 m |
Lock and Dam No. 24 ( Lock and Barrier No. 24 ) is one of 29 barrages that allow navigation on the Upper Mississippi . Erected between 1936 and 1940 by the United States Army Corps of Engineers , the combined structure is located in Clarksville , Pike County , Missouri . On the opposite left bank of the river is Calhoun County , Illinois . In 2004 the Lock and Dam No. 24 Historic District included in the NRHP .
Barrage
The barrage includes a 829.1 m long stone dam on the Illinois side and a 408.4 m long adjustable part, which consists of a 15-part segment weir .
The water level is 9 feet (2.70 m). The purpose of the weir is not flood protection, but damming the Mississippi for shipping.
lock
The lock is 182.9 m long and 33.5 m wide. Next to it is a second, but not completed, smaller lock chamber.