Rock Island District Header Image



Posted 5/4/2017

Bookmark and Share Email Print

Regional Program Manager
(309) 794-5428

Pool 18, Upper Mississippi River Miles 425.4 - 421.2, Des Moines County, Iowa

The Huron Island Complex is a 2,000 acre project that includes both Huron Island and Huron Chute located 9 river miles downstream from where the Iowa River enters the Mississippi River. Huron Island is heavily forested and dissected by a series of backwaters, secondary channels, and wetlands. Huron Chute separates Huron Island from the main land. The project includes 164 acres of backwater area, 500 acres of secondary channels, and 1336 acres of bottomland forest.

The bottomland forest are dominated by even aged soft mast tree species of silver maple, ash, and cottonwood. The sloughs and wetlands within Complex have lost much of their fish and wildlife habitat value due to silt deposition. Huron Chute is experiencing bankline sloughing in the upper portion, which has degraded the near-shore habitat.

Lands within the Complex are Federally owned by the Corps of Engineers and are part of the National Wildlife Refuge Complex. The U.S. Fish and Wildlife Service has been granted management responsibility for the Complex through an agreement with the Corps. The Fish and Wildlife Service has subsequently granted management of the complex to the Iowa Department of Natural Resources through a cooperative agreement.

Project Features:

  • Dredge connecting sloughs using mechanical dredging.
  • Utilize dredged material to construct several embankments and other high areas on which mast-producing bottomland hardwood species will be planted.
  • Provide bankline protection in Huron Chute.
  • Plant aquatic Vegetation.


Project Outputs: Dredging the sloughs would provide critically important off-channel deep water habitat for fish. Shallow depression wetlands would provide feeding areas for resident and migratory waterfowl, shorebirds, and wadiing birds. The mast tree plantings will increase species diversity and improve the existing timber stand. The project will enhance and maintain the quality and diversity of habitat in a major backwater complex in Pool 18.

The final Definite Project Report was approved in October 2013. Construction of Stage I was awarded in July 2014. Construction of Stage I was completed in September 2016. Construction of Stage II was awarded in August 2016 and underway.

CG - Construction General

Summarized Project Costs

Estimated Federal Cost  $15,773,000 
Estimated Non-Federal Cost  N/A 
Estimated Total Project Cost  $15,773,000 
Allocations Prior to Current FY 2017 Cost  $6,270,000 
Current FY 2017 Allocation (received to date)  $188,000 
Current FY 2017 Total Capability  $350,000 

Major Work Item Current Year
FY 2017:
Funds are being used to further construction on Stage II.