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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.
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.
The Upper Mississippi River is today 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 Mississippi River at St. Louis crested at 49.6 feet (15.1 m) on August 1, nearly 20 feet (6.1 m) above flood stage. It had a peak flow rate of 1,080,000 ft 3 /s (30,600 m 3 /s). At this rate, a bowl the size of Busch Memorial Stadium in St. Louis would be filled to the brim in 70 seconds. Costs and damage
The Upper Mississippi River National Wildlife and Fish Refuge protects more than 240,000 acres of floodplain along the river from Wabasha, Minnesota, to Rock Island, Illinois, including much of ...
The first bridge (and only log bridge) over the Mississippi, about 25 feet south of its source at Lake Itasca. This is a list of all current and notable former bridges or other crossings of the Upper Mississippi River which begins at the Mississippi River's source and extends to its confluence with the Ohio River at Cairo, Illinois.
The Upper Mississippi River National Wildlife and Fish Refuge is the longest contiguous river refuge in the continental U.S., spanning 261 river miles from Wabasha, Minnesota to Rock Island, Illinois.
A diagram that depicts river flows flow through the Morganza Spillway to the Red and Atchafalaya Rivers associated with a project design flood, which is the hypothetical "maximum probable" flood of the Mississippi River, as estimated by the Corps of Engineers. The water channel flow rates are listed in cubic feet per second.