Capoli Slough


The Capoli Slough Habitat Rehabilitation Project is located in the 2,000-acre Capoli Slough backwater across from Ferryville, WI, and approximately five miles below Lansing, IA. The site lies within the Upper Mississippi River National Wildlife and Fish Refuge in Crawford County, Wisconsin.

  • Need

     Since the creation of Lock and Dam No. 9 in 1937, several of the natural islands in this area eroded and disappeared. Island loss allows more wind and wave action in the backwaters, keeping sediment suspended (turbidity). The suspended sediment in turn makes it difficult for sunlight to penetrate the water and reach aquatic plants. This has resulted in the loss of valuable aquatic plant beds that migrating waterfowl and fish use for food and cover.

  • Project Description

    The completed  Capoli Slough Islands project includes eleven new islands, a riffle (rock lined) channel, and emergent wetlands. The islands were built using material dredged from the main channel and from within the Capoli Slough area backwaters. To prevent the new islands from eroding, rock was placed along sections of shoreline and vegetation was planted. The islands help protect and enhance existing islands and aquatic vegetation. The backwater dredging created deeper holes for fish. The riffle channel created habitat for fish and mussels. Migratory waterfowl, shorebirds, turtles, frogs, fish, mussels, beaver, mink, and otter are using the area for homes, food and resting areas.

  • Points of Contact

    US Army Corps of Engineers
    St. Paul District
    Tom Novak, Project Manager
    180 Fifth St. E Ste 700
    St. Paul, MN 55101-1678
    (651) 290-5524

    US Fish and Wildlife Service
    Upper Mississippi River National Wildlife & Fish Refuge 
    Wendy Woyczik, McGregor District Manager
    470 Cliff Haven Road
    Prairie du Chien, Wisconsin 53821
    (608) 326-0515 Ext. 101

    Wisconsin Department of Natural Resources
    Jeff Janvrin
    Mississippi River Habitat Specialist
    3550 Mormon Coulee Road
    La Crosse, WI 54601
    (608) 785-9005

    Iowa Department of Natural Resources
    Mike Griffin
    206 Rose Street
    Bellevue, IA 52031
    (563) 872-5700

  • Map

  • Upper Mississippi River Restoration