Lock and Dam No. 7 on:
[Wikipedia]
[Google]
[Amazon]
Lock and Dam No. 7 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 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 ro ...
702.5 near the cities of La Crescent, Minnesota
La Crescent is a city in Houston and Winona counties in the U.S. state of Minnesota. The population was 5,276 at the 2020 census.
La Crescent is located in the northeast portion of Houston County; the northern edge of the city falls into Winona ...
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 ...
. 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 Wisco ...
. 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
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 ...
.
The lock and dam system consists of a concrete structure long with five roller gates and 11 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 ...
s, a segment of earth embankment long from the dam to French Island separated by a concrete 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 th ...
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.
See also
* I-90 Mississippi River Bridge, 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