Search results
Results from the WOW.Com Content Network
Unlike the Lower Mississippi, much of the upper river is a series of pools created by a system of 29 locks and dams. The structures were authorized by Congress in the 1930s, and most were completed by 1940. [8] A primary reason for damming the river is to facilitate barge transportation. The dams regulate water levels for the Upper River and ...
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
Lock and Dam No. 13 is a lock and dam located on the Upper Mississippi River above Fulton, Illinois and Clinton, Iowa, United States.This facility offers visitors a view of the barges and boats locking through on the widest pool in the Upper Mississippi River.
Today, the upper river is divided into sections called pools, where a fixed amount of river is held back by a dam. ... The Army Corps operates 29 locks and dams on the upper Mississippi River ...
The prevalence of wild rice on pools 4, 8 and 13 of the upper Mississippi River from 1999 to 2023. ... A wild rice plant is pictured on the upper Mississippi River near Goose Island County Park in ...
Lock and Dam No. 24 is a lock and dam located near Clarksville, Missouri around river mile 273.4 on the Upper Mississippi River. The main lock is 110 feet (33.5 m) wide and 600 feet (182.9 m) long with its bottom at an elevation of 430 feet. The auxiliary lock is not operational. Normal pool elevation behind the dam is 449 feet.
Lock and Dam No. 17 is a lock and dam located near New Boston, Illinois on the Upper Mississippi River near river mile 437. Its main lock is 110 feet (33.5 m) wide and 600 feet (182.9 m) long with its bottom at an elevation of 518 feet (157.9 m). Normal pool elevation behind the dam is 536 feet (163.4 m).
Lock and Dam No. 9 is an American lock and dam located near Lynxville, Wisconsin and Harpers Ferry, Iowa on the Upper Mississippi River around river mile 647.9. The lower portion of Pool 9 was formally named Lake Winneshiek. The normal pool elevation behind the dam is 620 feet (189.0 m). It was constructed and placed in operation in July 1937.