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HAER No. MO-36, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 24, Clarksville, Pike County, MO", 44 photos, 9 data pages, 3 photo caption pages; HAER No. MO-37, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO", 93 photos, 9 data pages, 7 photo caption pages
The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, [1] a city 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 fairway depth of a river varies with the season, so some standardized depth value is used, usually the one corresponding to the low navigable water level (LNWL) defined as the water level that the river stays above during almost the entire navigation season: statistically, the level shall stay below the LNWL for 20 ice-free days per year ...
The Army Corps operates 29 locks and dams on the upper Mississippi River, from Minneapolis to Granite City, Illinois, north of St. Louis. The lower Mississippi does not need locks and dams because ...
A tow may consist of four or six barges on smaller waterways and up to over 40 barges on the Mississippi River below its confluence with the Ohio River. A 15-barge tow is common on the larger rivers with locks, such as the Ohio, Upper Mississippi, Illinois and Tennessee rivers. Such tows are an extremely efficient mode of transportation, moving ...
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The Upper Mississippi River covers approximately half of the Mississippi River's length. About 850 miles (1,370 km) of the river is navigable from Minneapolis-St. Paul (specifically, the Coon Rapids Dam in the City of Coon Rapids, MN) to the Ohio River. The river sustains a large variety of aquatic life, including 127 species of fish and 30 ...
List of crossings of the Upper Mississippi River – crossings north of the Ohio River List of crossings of the Lower Mississippi River – crossings south of the Ohio River This article includes a geography-related list of lists .