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Lock and Dam No. 7 is a 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 on the Upper Mississippi River
The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, at the confluence of its main tributary, the Missouri River.
History
In terms of geologic and hydrographic history, the Upper ...
at 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 ...
702.5 near the cities of La Crescent, Minnesota and Onalaska, Wisconsin
Onalaska is a city in La Crosse County, Wisconsin, United States. The population was 18,803 at the 2020 census. It borders the larger La Crosse, Wisconsin, and is a part of the La Crosse-Onalaska, WI-MN Metropolitan Area.
Onalaska is built on a ...
. It forms pool 7 and Lake Onalaska
Lake Onalaska is a reservoir located on the Black River and Mississippi River between Wisconsin, and Minnesota. It is approximately across, and is the widest point on the Mississippi River. Located in La Crosse County in the state of Wisconsin, ...
. The facility was constructed in the mid-1930s and placed in operation on April, 1937. It underwent major rehabilitation from 1989 through 2002. The lock and dam are owned and operated by the St. Paul 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 lock and dam system consists of a 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 11 tainter gates, a segment of earth embankment long from the dam to French Island French Island can refer to:
*French Island (Victoria), in Australia
*French Island, Wisconsin, in the United States
* French Island No. 1 and French Island No. 2 in the Ohio River in Kentucky
*French Island, an island in Ellis Pond, Oxford County, ...
separated by a concrete spillway long, and another embankment long from French Island to Onalaska which has a concrete spillway long. The lock is wide by long.
The lock and dam is one of the most visited because of its proximity to Interstate 90
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and ...
, and is clearly visible to travelers crossing the I-90 Mississippi River Bridge
The I-90 Mississippi River Bridge, or the Dresbach Bridge, consists of a pair of parallel bridges that traverse the Mississippi River, connecting the La Crosse, Wisconsin, La Crosse, Wisconsin area to Dresbach, Minnesota, Dresbach in rural Winona ...
.
See also
*I-90 Mississippi River Bridge
The I-90 Mississippi River Bridge, or the Dresbach Bridge, consists of a pair of parallel bridges that traverse the Mississippi River, connecting the La Crosse, Wisconsin, La Crosse, Wisconsin area to Dresbach, Minnesota, Dresbach in rural Winona ...
, just downstream.
* Upper Mississippi River National Wildlife and Fish Refuge
The Upper Mississippi River National Wildlife and Fish Refuge is a ,Public Works Administration Dams List
USGS Reach 1 pool 7U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 7 brochure
* {{DEFAULTSORT:Lock and Dam No. 07 Mississippi River locks Driftless Area Buildings and structures in La Crosse County, Wisconsin Buildings and structures in Winona County, Minnesota Transportation in Winona County, Minnesota Dams in Minnesota Dams in Wisconsin Historic American Engineering Record in Minnesota Historic American Engineering Record 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 1937 establishments in Minnesota 1937 establishments in Wisconsin Locks of Minnesota Locks of Wisconsin
Notes
External links
USGS Reach 1 pool 7
* {{DEFAULTSORT:Lock and Dam No. 07 Mississippi River locks Driftless Area Buildings and structures in La Crosse County, Wisconsin Buildings and structures in Winona County, Minnesota Transportation in Winona County, Minnesota Dams in Minnesota Dams in Wisconsin Historic American Engineering Record in Minnesota Historic American Engineering Record 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 1937 establishments in Minnesota 1937 establishments in Wisconsin Locks of Minnesota Locks of Wisconsin