Lock and Dam No. 24
Encyclopedia
Lock and Dam No. 24 is a lock
and dam
located near Clarksville, Missouri
around river mile
273.4 on the Upper
Mississippi River
. The main lock is 100 feet (30.5 m) wide and 600 feet (182.9 m) long with its bottom at an elevation of 430 feet. The auxiliary lock is not operational. Normal pool elevation behind the dam is 449 feet. The movable portion of the dam is 1340 feet (408.4 m) long and consists of 15 submersible, elliptical, tainter gate
s. A 2720 feet (829.1 m) submersible earthen dike extends from the movable dam to the Illinois shore. In 2004, the facility was listed in the National Register of Historic Places
as Lock and Dam No. 24 Historic District, #04000183 covering 1027 acres (4.2 km²), 3 buildings, 15 structures, 4 objects.
Lock (water transport)
A lock is a device for raising and lowering boats between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is...
and dam
Dam
A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...
located near Clarksville, Missouri
Clarksville, Missouri
Clarksville is a city in Pike County, Missouri, United States. The population was 490 at the 2000 census.-Geography:...
around river mile
River mile
In the United States, a River mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the River kilometer...
273.4 on the Upper
Upper Mississippi River
The Upper Mississippi River is the portion of the Mississippi River upstream of Cairo, Illinois, United States. From the headwaters at Lake Itasca, Minnesota, the river flows approximately 2000 kilometers to Cairo, where it is joined by the Ohio River to form the Lower Mississippi...
Mississippi River
Mississippi River
The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...
. The main lock is 100 feet (30.5 m) wide and 600 feet (182.9 m) long with its bottom at an elevation of 430 feet. The auxiliary lock is not operational. Normal pool elevation behind the dam is 449 feet. The movable portion of the dam is 1340 feet (408.4 m) long and consists of 15 submersible, elliptical, tainter gate
Tainter gate
The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow. It is named for Wisconsin structural engineer Jeremiah Burnham Tainter....
s. A 2720 feet (829.1 m) submersible earthen dike extends from the movable dam to the Illinois shore. In 2004, the facility was listed in the National Register of Historic Places
National Register of Historic Places
The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...
as Lock and Dam No. 24 Historic District, #04000183 covering 1027 acres (4.2 km²), 3 buildings, 15 structures, 4 objects.