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The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, [1] at the confluence of its main tributary, the Missouri River. [citation needed] Historically, it may refer to the area above the Arkansas Post, above the confluence of Ohio River, or above Cape Girardeau.
The uppermost lock and dam on the Upper Mississippi River is the Upper St. Anthony Falls Lock and Dam in Minneapolis. Above the dam, the river's elevation is 799 feet (244 m). Below the dam, the river's elevation is 750 feet (230 m). This 49-foot (15 m) drop is the largest of all the Mississippi River locks and dams.
Lock and Dam No. 3: Red Wing, Minnesota: 796.9 675 feet Owned/operated by U.S. Army Corps of Engineers, Mississippi Valley Division, St. Paul District : Lock and Dam No. 4: Alma, Wisconsin
Construction began in 1979, the main lock opened in 1990, and the full structure was completed in 1994. It replaced the earlier Lock and Dam No. 26, demolished in 1990, and is the first replacement structure on the Upper Mississippi River nine-foot navigation project. The main lock is 1,200 feet (370 m) long and 110 feet (34 m) wide; the ...
The Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the United States. [3] In the United States, the Mississippi drains about 41% of the country's rivers.
List of crossings of the Upper Mississippi River. The inland and intercoastal waterways, with the Upper Mississippi highlighted in red. The first bridge (and only log bridge) over the Mississippi, about 25 feet west of its source at Lake Itasca. This is a list of all current and notable former bridges or other crossings of the Upper Mississippi ...
Chain of Rocks Lock and Dam, also known as Locks No. 27, is a lock situated at the southern end of Chouteau Island near St. Louis, Missouri on the Upper Mississippi River.Its associated dam is just downstream of the Chain of Rocks Bridge, and the lock is located over 3 miles (4.8 km) southeast on the Chain of Rocks canal.
lock and dam. MPS. Upper Mississippi River 9-Foot Navigation Project MPS. NRHP reference No. 04000171 [1] Added to NRHP. March 10, 2004. 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. It was opened to navigation September 14, 1937.
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