US Army Corps of Engineers
St. Paul District Website

Upper Mississippi River 9-Foot Channel Navigation Project Locks and Dams, Minnesota/Wisconsin/Iowa

Published Feb. 27, 2015
Updated: April 16, 2020
Lock and Dam 6, near Tremplealeau, Wis.

Lock and Dam 6, near Tremplealeau, Wis.

Lock and Dam 3, Welsh, Minn. Upper Mississippi River mile 796.9.

Lock and Dam 3, Welsh, Minn. Upper Mississippi River mile 796.9.

Lock and Dam 6, Trempealeau, Wis. Upper Mississippi River mile 714.1

Lock and Dam 6, Trempealeau, Wis. Upper Mississippi River mile 714.1

Lock and Dam 5, Minnesota City, Minn. Upper Mississippi River mile 738.1

Lock and Dam 5, Minnesota City, Minn. Upper Mississippi River mile 738.1

Lock and Dam 5A, between Fountain City, Wis., and Winona, Minn. Upper Mississippi River mile 728.5

Lock and Dam 5A, between Fountain City, Wis., and Winona, Minn. Upper Mississippi River mile 728.5

Lock and Dam 10, Guttenburg, Iowa. Upper Mississippi River mile 615.0

Lock and Dam 10, Guttenburg, Iowa. Upper Mississippi River mile 615.0

Lock and Dam 1, Minneapolis, Minn. Upper Mississippi River mile 847.9

Lock and Dam 1, Minneapolis, Minn. Upper Mississippi River mile 847.9

Purpose

The U.S. Army Corps of Engineers, St. Paul District is responsible for maintaining 244 miles of the Upper Mississippi River 9-foot channel navigation system.

Location

Minneapolis, Minnesota to Guttenberg, Iowa.

Description

The navigation project within the St. Paul District includes 13 locks and dams (LD) that are operated and maintained by the Corps. In addition to the locks and dams the project includes channel maintenance, recreation and natural resource activities.

Approximately 18 million tons of cargo travels through the St. Paul District each year. The system’s infrastructure is comprised of 10 lock chambers 600 feet long, 3 lock chambers 400 feet long, 170 dam gates, 8 fixed crest spillways and 16 miles of embankments acting as dams. Each lock chamber includes two sets of operable steel gates controlling entry to and exit from the lock.

Status

Operation and maintenance of the project are funded annually under the Corps’ Civil Works Operation and Maintenance appropriation. Mississippi River funding allocated to the St. Paul District in recent fiscal years has ranged from $50 to $60 million.

Authority

The project was authorized as part of the River and Harbor Act approved July 3, 1930. The act authorized the construction, repair and preservation of public works on rivers and harbors and for other purposes.

Funding

FY 2019:
Pavement Repairs at LD 10                                              $73,000
Miter Gate Anchorages at LD 2                                  $3.2 million
Tow Rail Replacement at LD 4, 5, 5A, 6, 7 8 & 9    $20.3 million
LED Lighting Upgrade at LD 2 – LD 10                          $540,000
Lockmaster House Rehab at LD 10                               $250,000

FY 2020:
Tainter Gate Chain at LD 2                                            $430,000
Pier House Roofs at LD 3 & 7                                        $500,000
Embankment Resurfacing at LD 5                                $625,000
Pavement Rehab at LD 9 & 10                                      $400,000
Design Miter Gates for LD 6, 7 & 9                               $730,000
Design Miter Gate Anchorages at LD 5A, 8 & 10   $1.2 million
Dewater Prep at LD 4                                                 $1.2 million