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The system was renamed the McAlpine Locks and Dam in 1960 in honor of William McAlpine, who was the only civilian to have ever served as district engineer for the Corps of Louisville. At present, the normal pool elevation is 420 feet (130 m) above sea level and the drainage area above the dam is 91,170 square miles (236,000 km 2 ).
They determined that building a system of locks and dams to form pools was the best solution to the problem. Following the opening of the lock and dam at Davis Island in 1885, the venture proved to be worthy. In 1910, the Rivers and Harbors Act was authorized by Congress. The Act allowed the production of a system of locks and dams along the Ohio.
The Louisville and Portland Canal was a 1.9-mile (3.1 km) [1] canal bypassing the Falls of the Ohio River at Louisville, Kentucky.The Falls form the only barrier to navigation between the origin of the Ohio at Pittsburgh and the port of New Orleans near the Gulf of Mexico; circumventing them was long a goal for Pennsylvanian and Cincinnatian merchants. [2]
C.W. Bill Young Lock and Dam (formerly known as Allegheny River Lock and Dam No. 3 [2]) in Harmar Township, Allegheny County, Pennsylvania, and Plum, Pennsylvania, is a lock that was built in 1932. [3] The lock and fixed-crest dam [3] were built by the U.S. Army Corps of Engineers as a part of an extensive system of locks and dams to improve ...
The main lock is 1,200 feet (370 m) long and 110 feet (34 m) wide; the auxiliary is 600 feet (180 m) long and 110 feet (34 m) wide. The main lock has a vertical lift gate and a miter gate while the aux. lock has two miter gates. The dam is 1,160 feet (350 m) long with 9 tainter gates, each 110 feet (34 m) wide by 42 feet (13 m) high.
Situated thirty-two miles downstream from the city of Pittsburgh, Pennsylvania, this lock and dam system has two locks, one for commercial barge traffic that is 600 feet long by 110 feet wide, and the other, which is a recreational auxiliary lock that is 360 feet long by 56 feet wide.
In terms of geologic and hydrographic history, the Upper Mississippi east and south of Fort Snelling is a portion of the now-extinct Glacial River Warren which carved the valley of the Minnesota River, permitting the immense Glacial Lake Agassiz to join the world's oceans at the Gulf of Mexico.
HAER documentation of individual locks and dams: HAER No. MN-21, "Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red Wing, Goodhue County, MN", 98 photos, 11 data pages, 7 photo caption pages; HAER No. MN-22, "Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN", 92 photos, 11 data ...