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Mississippi River Lock & Dam No. 7

General Information

Beginning of works: 1933
Completion: April 1937
Status: in use

Project Type

Location

Location: , ,
, ,
Impounds:
  • Mississippi River
Coordinates: 43° 52' 0.99" N    91° 18' 25.99" W
Show coordinates on a map

Technical Information

Dimensions

height 12 m
length of movable section 286.5 m
embankment 1 length 2 468.9 m
embankment 2 length 731.5 m

Excerpt from Wikipedia

Lock and Dam No. 7 is a lock and dam located on the Upper Mississippi River at river mile 702.5 near the cities of La Crescent, Minnesota and Onalaska, Wisconsin. It forms pool 7 and Lake Onalaska. 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-Mississippi Valley Division.

The lock and dam system consists of a concrete structure 940 feet (286.5 m) long with five roller gates and 11 tainter gates, a segment of earth embankment 8,100 feet (2,468.9 m) long from the dam to French Island separated by a concrete spillway 1,000 feet (304.8 m) long, and another embankment 2,400 feet (731.5 m) long from French Island to Onalaska which has a concrete spillway 670 feet (204.2 m) long. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. The lock and dam is one of the most visited because of its proximity to Interstate 90, and is clearly visible to travelers crossing the I-90 Mississippi River Bridge.

Text imported from Wikipedia article "Lock and Dam No. 7" and modified on 23 July 2019 under the CC-BY-SA 3.0 license.

Participants

Currently there is no information available about persons or companies having participated in this project.

Relevant Web Sites

  • About this
    data sheet
  • Structure-ID
    20030603
  • Published on:
    24/08/2007
  • Last updated on:
    21/10/2017
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