The Monongahela River —often referred to locally as the Mon —is a 130-mile-long (210 km) river on the Allegheny Plateau in north-central West Virginia and southwestern Pennsylvania. The river flows from the confluence of its west and east forks in north-central West Virginia northeasterly into southwestern Pennsylvania, then northerly to Pittsburgh and its confluence with the Allegheny River to form the Ohio River. The river's entire length is navigable via a series of locks and dams.
The Tennessee–Tombigbee Waterway is a 234-mile (377 km) man-made U.S. waterway built in the 20th century from the Tennessee River to the junction of the Black Warrior-Tombigbee River system near Demopolis, Alabama. The Tennessee–Tombigbee Waterway links commercial navigation from the nation's midsection to the Gulf of Mexico. The major features of the waterway are 234 miles (377 km) of navigation channels, a 175-foot-deep (53 m) cut between the watersheds of the Tombigbee and Tennessee rivers, and ten locks and dams. The locks are 9 by 110 by 600 feet, the same dimension as those on the Mississippi above Lock and Dam 26 at Alton, Illinois. Under construction for 12 years by the U.S. Army Corps of Engineers, the Tennessee–Tombigbee Waterway was completed in December 1984 at a total cost of nearly $2 billion.
Wheeler Dam is a hydroelectric dam on the Tennessee River between Lauderdale County and Lawrence County in Alabama. It is one of nine dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the mid-1930s as part of a New Deal-era initiative to improve navigation on the river and bring flood control and economic development to the region. The dam impounds the Wheeler Lake of 67,070 acres (27,140 ha) and its tailwaters feed into Wilson Lake.
Lock and Dam No. 2 is located along the Upper Mississippi River near Hastings, Minnesota and construction commenced in 1927. The eastern dam portion is 722 feet (220 m) wide and has 19 tainter gates. A hydroelectric station that produces about 4.4 megawatts is owned by the city of Hastings, while the 110 by 600 feet lock is operated by the St. Paul district of the U.S. Army Corps of Engineers' Mississippi Valley Division. There's also a wide earthen dam on the western side of the facility.
Melvin Price Locks and Dam is a dam and two locks at river mile 200.78 on the Upper Mississippi River, about 17 miles (27 km) north of Saint Louis, Missouri. The collocated National Great Rivers Museum, at 1 Lock and Dam Way, East Alton, Illinois, explains the structure and its engineering.
Lock and Dam No. 7 is a lock and dam located on the Upper Mississippi River at river mile 702.5 near the cities of La Crescent, Minnesota and Onalaska, Wisconsin. It forms pool 7 and Lake Onalaska. The facility was constructed in the mid-1930s and placed in operation on April, 1937. It underwent major rehabilitation from 1989 through 2002. The lock and dam are owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division.
Lock and Dam No. 10 is a lock and dam located in Guttenberg, Iowa on the Upper Mississippi River around river mile 615.0. It was constructed and placed in operation November 1937. The site underwent major rehabilitation 1989—2006. The dam consists of a concrete dam 763 feet (232.6 m) long with four roller gates and eight tainter gates. The earth embankment is 4,223 feet (1,287.2 m) long with a concrete spillway 1,200 feet (365.8 m) long. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. The lock and dam are owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division.
General Zebulon Pike Lock and Dam No. 11 is a lock and dam located between Dubuque, Iowa and rural Grant County, Wisconsin, on the Upper Mississippi River.
Lock and Dam No. 12 is a lock and dam located on the Upper Mississippi River at Bellevue, Iowa, United States. The movable portion of the dam starts at the locks adjacent to the Iowa shore and is 849 feet (258.8 m) long, consisting of seven tainter gates and three roller gates. It connects to a 200-foot (61.0 m) storage yard and continues toward the Illinois shore with a 2,750-foot (838.2 m) non-submersible dike, a 1,200-foot (365.8 m) submersible dike and a 3,130-foot (954.0 m) non-submersible dike. The non-submersible sections are separated from the submersible section with two 120-foot (36.6 m) transitional dikes. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. There is also an incomplete auxiliary lock. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 12 Historic District, #04000172 covering 1,017 acres (4.1 km2), 1 building, 3 structures, and 4 objects.
Lock and Dam No. 13 is a lock and dam located on the Upper Mississippi River above Fulton, Illinois and Clinton, Iowa, United States. This facility offers visitors a view of the barges and boats locking through on the widest pool in the Upper Mississippi River.
Lock and Dam No. 14 is a lock and dam located near LeClaire, Iowa on the Upper Mississippi River above Davenport, Iowa and Moline, Illinois. The movable portion of the dam is 1,343 feet (409.3 m) long and consists of 13 tainter gates and 4 roller gates. Connected to it is a 1,127 feet (343.5 m) long non-submersible rock fill dike which extends to the Illinois side. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. The site on the National Register of Historic Places as the Lock and Dam No. 14 Historic District (#04000174) listed in 2004 consisting of 3,043 acres (12.3 km2), 1 building, 6 structures, and 2 objects. It was completed in two phases, the first as part of the six foot channel project from 1921 to 1924, which included a lock and canal bypassing a hazardous rapids. The second phase was part of the nine foot channel project from 1935 to 1939 and included the main dam and the current main lock.
Lock and Dam No. 15 is a lock and dam located on the Upper Mississippi River. It spans the river between Rock Island, Illinois and Davenport, Iowa. Lock and Dam 15 is the largest roller dam in the world, its dam is 1,203 feet (366.7 m) long and consists of nine 109 feet (33.2 m) non-submersible, non-overflow roller gates and two 109 feet (33.2 m) non-submersible overflow roller gates. It is unusual among the upper Mississippi River dams in that it has only roller gates, has different sizes and types of roller gates, it is not perpendicular to the flow of the river and is one of the few facilities that has a completed auxiliary lock. The main lock is 110 feet (33.5 m) wide by 600 feet (180 m) long and its auxiliary lock is 110 feet (34 m) wide by 360 feet (110 m) long. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 15 Historic District, #04000175 covering 3,590 acres (1,450 ha), 2 buildings, 9 structures, and 1 object.
Lock and Dam No. 20 is a lock and dam located on the Upper Mississippi River, about one mile upstream from Canton, Missouri.
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 110 feet (33.5 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 1,340 feet (408.4 m) long and consists of 15 submersible, elliptical, tainter gates. A 2,720 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 1,027 acres (4.2 km2), 3 buildings, 15 structures, 4 objects.
The Cannelton Locks and Dam is a tainter-gated dam with two locks on the Ohio River, on the border between the U.S. states of Indiana and Kentucky. The dam is 2 miles (3.2 km) southeast of Cannelton, Indiana. Construction of the locks began in July 1963. The locks began operation in December 1966 and were completed April 1967. Construction on the dam started in August 1965 and the dam was completed in 1974. The structure was designed, built, and is operated by the United States Army Corps of Engineers Louisville District.
The Olmsted Locks and Dam is a locks and concrete dam on the Ohio River at river mile 964.4. The project is intended to reduce tow and barge delays by replacing the existing older, and frequently congested, locks and dams Number 52 and Number 53. The locks are located about 17 miles upstream from the confluence of the Ohio and Mississippi rivers at Olmsted, Illinois.
LaGrange Lock and Dam is a lock and dam complex on the Illinois River at Versailles, Illinois. The structure includes a 1,066 feet (325 m) dam and a 110 by 600 feet lock. The U.S. Army Corps of Engineers built the complex from 1936 to 1939; A.F. Griffin designed the lock and dam, while Paul Le Gromwell designed the control station. The lock and dam, as well as a similar lock and dam near Peoria, were needed when the authorized channel depth was raised to nine foot. The Peoria and LaGrange locks replaced older locks on the lower Illinois River. The lock uses Chanoine wicket gates, which allow for navigation on the river, rather than the Tainter gates seen elsewhere on the river.
The Yamhill River lock and dam was completed in 1900. It was built near Lafayette, Oregon, to allow better river transport on the Yamhill River from Dayton, to McMinnville, Oregon. While the Corps of Engineers had recommended against construction of the lock, it was built anyway, largely as a result of political effort by the backers of the project. For almost forty years prior to the lock construction there had been efforts made to construct a lock and dam on the Yamhill River.
The W. D. Mayo Lock and Dam on the Arkansas River is an integral part of the McClellan-Kerr Arkansas River Navigation System (MKARNS). The dam is located at navigation mile 319.6, about 9 miles (14 km) southwest of Fort Smith, Arkansas. It is the first lock and dam west of the Arkansas-Oklahoma state line. It was named for a deceased Sallisaw, Oklahoma businessman who was also a civic leader and champion of fully developing the river. The number 14 designates this facility as the fourteenth in sequence from the start of MKARNS. It lies in LeFlore and Sequoyah Counties, Oklahoma.
