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HAER No. MO-34, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex No. 20, Canton, Lewis County, MO", 33 photos, 18 data pages, 2 photo caption pages HAER No. MO-35, " Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex No. 22, Saverton, Ralls County, MO ", 21 photos, 15 data pages, 2 photo caption pages
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 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 .
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 ...
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. [4]
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.
Lock and Dam No. 25 is a lock and dam located near Winfield, Missouri, on the Upper Mississippi River around river mile 241.4. The movable portion of the dam is 1,296 feet (395.0 m) long and consists of three roller gates and 14 tainter gates. A 2,566 feet (782.1 m) submersible dike extends to the Illinois shore.
Madeline Heim is a Report for America corps reporter who writes about environmental issues in the Mississippi River watershed and across Wisconsin. Contact her at (920) 996-7266 or mheim@gannett.com .