Lock and Dam No. 9 is a

lock Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...

and

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, a ...

located near

Lynxville, Wisconsin Lynxville is a village in Crawford County, Wisconsin, United States. The population was 132 at the 2010 census. History The village was named for the ship ''Lynx'' which brought the first surveyors to the area. Mitchel Caya was the first resident ...

and

Harpers Ferry, Iowa Harpers Ferry is a city in Taylor Township, Allamakee County, Iowa, United States. The population was 262 at the time of the 2020 census. History Harpers Ferry was platted in 1852; it was then called Winfield. In 1860, the name was changed to ...

on the Upper

Mississippi River The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it f ...

around

river mile A river mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the river kilometer. They are analogous to vehicle road ...

647.9. The lower portion of Pool 9 was formally named

Lake Winneshiek Lake Winneshiek is the name given to that portion of Navigation Pool 9 impounded by Lock and Dam No. 9 between the dam to 4 miles south of the city of Lansing, Iowa on the Upper Mississippi River, near Ferryville, Wisconsin. It encompasses about ...

. The normal pool elevation behind the dam is . It was constructed and placed in operation in July 1937. The site underwent a major rehabilitation from 1989 and 2006. The dam consists of concrete structure long with five

roller gates Roller may refer to: Birds *Roller, a bird of the family Coraciidae * Roller (pigeon), a domesticated breed or variety of pigeon Devices * Roller (agricultural tool), a non-powered tool for flattening ground * Road roller, a vehicle for compa ...

and eight

tainter gate The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow. It is named for Wisconsin structural engineer Jeremiah Burnham Tainter. A side view of a Tainter gate resembles a slice of pie with the c ...

s. Earth embankment long with a grouted overflow

spillway A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure tha ...

long. The lock is wide by long. Lock and Dam No. 9 is located 12 miles upstream from

Prairie du Chien, Wisconsin Prairie du Chien () is a city in and the county seat of Crawford County, Wisconsin, United States. The population was 5,506 at the 2020 census. Its ZIP Code is 53821. Often referred to as Wisconsin's second oldest city, Prairie du Chien was esta ...

. The lock and dam are owned and operated by the

St. Paul Paul; grc, Παῦλος, translit=Paulos; cop, ⲡⲁⲩⲗⲟⲥ; hbo, פאולוס השליח (previously called Saul of Tarsus;; ar, بولس الطرسوسي; grc, Σαῦλος Ταρσεύς, Saũlos Tarseús; tr, Tarsuslu Pavlus; ...

District of the

United States Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...

Mississippi Valley Division The United States Army Corps of Engineers Mississippi Valley Division (MVD) is responsible for the Corps water resources programs within 370,000-square-miles of the Mississippi River Valley, as well as the watershed portions of the Red River o ...

Images

Upper Mississippi River National Wildlife and Fish Refuge The Upper Mississippi River National Wildlife and Fish Refuge is a ,U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 9U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 9 brochureBlackhawk Park - U.S. Army Corps of Engineers ParkLock and Dam No. 9 Fishing Forum
*
Friends of Pool 9
- Nonprofit organization dedicated to keeping the pool clean, managing annual volunteer cleanups, particularly of backwaters {{DEFAULTSORT:Lock and Dam No. 09 Mississippi River locks Buildings and structures in Allamakee County, Iowa Buildings and structures in Crawford County, Wisconsin Driftless Area Transportation buildings and structures in Allamakee County, Iowa Dams in Iowa Dams in Wisconsin United States Army Corps of Engineers dams Transport infrastructure completed in 1937 Roller dams Gravity dams Dams on the Mississippi River Mississippi Valley Division Historic American Engineering Record in Iowa Historic American Engineering Record in Wisconsin Locks of Iowa Locks of Wisconsin 1937 establishments in Iowa 1937 establishments in Wisconsin

Images

See also