Iowa projects, studies and information papers

Dam Safety Program: Iowa

The overlying purpose of dam safety is to ensure the integrity and viability of dams such that they do not present unacceptable risks to the public, property, and the environment.
Published: 4/9/2024

Levee Safety Program: Iowa

The basic objectives of the Levee Safety Program are to develop balanced and informed assessments of levees within the program; evaluate, prioritize and justify levee safety decisions; and recommend improvements to public safety associated with levee systems. The Corps created the National Levee Database, inventoried all levees in the program and improved inspection procedures. The Corps is developing a method to manage its levee systems and is reviewing and revising current levee-related policies and procedures.
Published: 2/26/2015

Mississippi River Locks and Dams 2–10 Embankment Rehabilitation Adjacent to Structures

Embankment rehabilitation will address restoring embankments to meet current design standards. Overtopping protection adjacent to concrete structures is the first priority for design and construction. No increase in the height of the embankments is planned. Upper Mississippi Locks and Dams 2 through 10.
Published: 2/26/2015

Mississippi River Locks and Dams 2–10 Non-Structural Embankment Repair

The non-structural embankment repair projects at Locks and Dams (LD) 2 through 10 will address restoring embankments to meet current design standards. Most dam embankments are currently protected from the erosive forces of water by a layer of riprap placed along the embankment’s length. When the riprap eventually erodes, the embankment itself will erode if more protection is not added. Upper Mississippi Locks and Dams 2 through 10.
Published: 3/22/2019

Mississippi River Locks and Dams 2–10 Tow Rail System

The tow rail system is integral to the operation of each of the Mississippi River Locks and Dams 2 through 10. It is attached to the top of the lock guidewall and helps guide tows through the lock chamber. Each system is comprised of an operating unit, rail and traveling kevel or “mule.” The Locks and Dams 2 through 10 tow rail systems have been deteriorating over the past several years, requiring rehabilitation of these systems.
Published: 3/14/2016

Mississippi River Locks and Dams 3–10 Sheet Pile Installation at Auxiliary Locks

Locks and Dams 3 through 10 have auxiliary chambers. Each auxiliary chamber has only a single set of miter gates that could pass shallow draft navigation traffic if the lock chamber was out of operation and the upstream and downstream pools were equalized. At each site, the U.S. Army Corps of Engineers only installed one set of miter gates. An auxiliary lock chamber was never authorized by Congress, which would have included a second set of miter gates. Since installation, the auxiliary emergency gates have never been used, and the gate operating machinery was never installed.
Published: 9/12/2016

Navigation: Mississippi River End Cells

The purpose of this project is to extend the longevity of the guidewalls at each of our locks and dams and to reduce operability issues and required maintenance. An end cell would provide adequate protection of the end monolith along the guidewalls, while the past crib grouting component will add stability. Lock and Dams 2 through 10, which are located from Hastings, Minnesota, to Guttenberg, Iowa.
Published: 3/16/2017

Navigation: Routine Dam Gate Maintenance

Maintenance of the dam spillway gates are required to avoid degradation and eventual replacement. Benefit – cost analyses show it is economically favorable to maintain the gates rather than the replacement option. There are also reliability and safety concerns with allowing the gates to degrade to the point that they must be replaced. formed on site.
Published: 2/26/2015

Pool 10 Dredged Material Management Plan – Allamakee & Clayton County, Iowa, and Crawford & Grant County, Wisconsin

The Pool 10 Dredged Material Management Plan (DMMP) study area is located between Lock and Dam 9 near Lynxville, Wisconsin, and Lock and Dam 10 at Guttenberg, Iowa, spanning nearly 33 river miles from 615.1 to 648.0. The study area includes several communities near the main navigation channel including Prairie du Chien, Wisconsin, and Guttenberg, Iowa.
Published: 3/17/2021

Pool 9 Dredged Material Management Plan – Houston County, Minnesota, Allamakee County, Iowa, and Vernon County, Wisconsin

The purpose of the DMMP is to prepare a coordinated long-term plan for managing dredged material in Pool 9. This plan was initiated due to needs for dredged material management upland placement sites, especially in the upstream reach of the pool. The Pool 9 Dredged Material Management Plan (DMMP) study area is located between Lock and Dam 8 at Genoa, Wisconsin, and Lock and Dam 9 near Lynxville, Wisconsin, spanning more than 31 river miles from 679.2 to 648.0. The study area includes several communities near the main navigation channel including Lansing, Iowa, and De Soto, Wisconsin.
Published: 3/15/2018

Upper Mississippi River - Illinois Waterway System Navigation and Ecosystem Sustainability Program (NESP)

Navigation and Ecosystem Sustainability Program (NESP) is a long-term program of ecosystem restoration and navigation improvements for the Upper Mississippi River System (UMRS). NESP will improve system capacity and reduce commercial traffic delays through construction of seven new 1,200-foot locks, mooring cells, and switchboat implementation.
Published: 12/2/2020

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

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 from Minneapolis, Minnesota, to Guttenberg, Iowa. The Upper Mississippi River 9-Foot Channel Navigation Project is located in or contiguous to Minnesota, Wisconsin, and Iowa. The navigation project within the St. Paul District includes 13 locks and dams 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.
Published: 2/27/2015

Upper Mississippi River 9-Foot Channel Navigation Project Maintenance Minnesota/Wisconsin/Iowa

The U.S. Army Corps of Engineers is responsible for maintaining a 9-foot navigation channel as an important component to the inland navigation system. The St. Paul District (MVP) is responsible for maintaining 244 miles of the Upper Mississippi River 9-Foot Channel Navigation Project from the head of navigation at Minneapolis, Minnesota, to Guttenberg, Iowa. The navigation project also includes the lower navigable portions of the Minnesota, St. Croix, and Black Rivers.
Published: 2/26/2015

Upper Mississippi River Restoration Program: Minnesota/Wisconsin/Iowa Habitat Restoration

This program, authorized by Congress in 1986, emphasizes habitat rehabilitation and enhancement projects (HREPs) and long-term resource monitoring. The HREP component includes dredging backwater areas and channels, constructing dikes, creating and stabilizing islands, controlling side channel flows and water levels, and creating floodplain forest habitat.
Published: 3/20/2017

Upper Mississippi River Restoration Program: Reno Bottoms, Pool 9, Upper Mississippi River

The primary objective of this project is to protect, restore, or create resilient and diverse bottomland forests. The quality and extent of the unique forest and aquatic habitat in the Reno Bottoms project area has been declining over the past several decades. Human caused changes in hydrology, land use, and climate have increased water levels within the project area. Without action, the project area will continue to degrade. The quality of forest and aquatic habitat will decrease. Invasive grasses would expand into forests, limiting opportunities for smaller trees to grow and reducing habitat value. Additional loss of wetland habitat would adversely affect migrating waterbirds and songbirds who require the floodplain forest to stop and rest.
Published: 3/22/2019