US Army Corps of Engineers
St. Paul District Website

Upper Mississippi River Restoration Program: McGregor Lake, Prairie Du Chien, Wisconsin Habitat Restoration

Published April 12, 2017
Updated: Nov. 24, 2020

The project’s purpose is to support diverse and abundant native fish, wildlife and plants while sustaining a high level of environmental health and promoting recreation opportunities.


McGregor Lake is a 200-acre backwater lake in Pool 10 of the Mississippi River. The McGregor Lake Habitat Rehabilitation and Enhancement Project (HREP) is located on the Wisconsin side of the Upper Mississippi River in the middle of Pool 10, near Prairie Du Chien, Wisconsin. The site lies within the Upper Mississippi River National Wildlife and Fish Refuge.

McGregor Lake and the surrounding area have encountered degradation in the recent past. Emergent and submergent vegetation are lacking, and shorelines are eroding, which impacts floodplain forest as well as the federally protected Higgins eye pearlymussel.
To mitigate these impacts, the project aims to: improve lake habitat for backwater fish species, increase emergent vegetation growth, increase submergent vegetation growth, increase age and species diversity of self-sustaining floodplain forest, and protect aquatic and terrestrial habitat by reducing erosion.
The U.S. Army Corps of Engineers partnered with an architecture and engineering (A-E) firm to complete the design phase. The contract was advertised in July 2020 and awarded in September 2020. Construction will begin in fall 2020; the project is anticipated to take five years to construct.
Congress originally authorized the Upper Mississippi River Restoration (UMRR) Program in Section 1103 of the 1986 Water Resources Development Act (WRDA) (Public Law 99‒662), codified at 33 U.S.C. § 652. Congress reauthorized the UMRR Program in WRDA 1999 (Public Law 106‒53).
The project is being planned and designed as part of a cooperative effort of the Corps, the U.S. Fish and Wildlife Service (USFWS), the Iowa and Wisconsin Departments of Natural Resources and local interests.
Project design and construction costs will be 100 percent federal because the project is located on lands managed as a national wildlife refuge. Operation and maintenance costs will be 100 percent federal, a responsibility of the USFWS.
Funding to Date                                                  $6,943,000
Estimated Project Construction Costs          $17,500,000