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Corps Island dredged material unloading

Posted: 4/6/2018

Expiration date: 5/7/2018

Summary of the Proposed Project

Corps Island is a designated transfer site used in support of the Corps' 9-Foot Navigation Channel, where dredged material is stored and later transferred for permanent placement. Currently there is roughly 420,000 cubic yards of dredged on the island. Over the next year there is anticipated to be an additional 80,000 cubic yards of dredged material added to Corps Island, making the total amount to be offloaded roughly 500,000 cubic yards. This action would allow for continued placement of dredged material at Corps Island, thus allowing for continued maintenance of the Mississippi River 9-Foot Navigation Channel. The process by which dredged material would be removed from Corps Island, and where it would be placed or used, would be decided by the awarded contractor.

Project Authority

Authority for continued operation and maintenance of the Mississippi River Nine-Foot Channel project is provided in the River and Harbor Act of 1930.


Project Location

The proposed project would take place at Corps Island within Goodhue County near the right descending bank in Pool 3 of the Upper Mississippi River near river mile 799. A site map of project area can be viewed within the Environmental Assessment (see attachments at the top of this web page).



General - A draft Environmental Assessment, or EA, and finding of no significant impact was prepared and coordinated in accordance with the National Environmental Policy Act. The draft EA will be sent to federal and state agencies for review and comment.

State - The awarded contractor would be responsible for compliance with all applicable laws and regulations when transporting, utilizing, disposing or selling the dredged material from Corps Island.


Summary of Environmental Impacts

The proposed alternative would have a temporary minor adverse effect on noise levels, aesthetic values, recreational opportunities, transportation, air quality, terrestrial habitat and surface water quality within the project area. The proposed alternative may result in minor controversy. The proposed alternative would result in temporary minor aquatic habitat benefits and minor benefits to commercial navigation and recreational opportunities. The majority of Corps Island's land is covered in old dredged material, making it an island of mostly barren and unproductive sand. There is some vegetation and trees on the outside of the island, which would be protected to maintain the structure of the island once unloading is complete. The St. Paul District has determined that the proposed alternative would have no effect on threatened or endangered species within the project area.



A draft EA that describes the project and the environmental impacts in detail is available to the public (see attachments at the top of this web page). The report includes a Draft Finding ofNo Significant Impact.


Review and Comment

If you have any comments on the Environmental Assessment they should be provided before the expiration date of this notice (May 7, 2018). Persons submitting comments are advised that all comments received will be available for public review, to include the possibility of posting on a public website.

Questions on the project or comments on the EA can be directed to Trevor Cyphers at 651-290-5031 or at trevor.w.cyphers@usace.army.mil


Please address all formal written correspondence on this project to: 

District Commander

St. Paul District, Corps of Engineers

ATTN: Regional Planning and Environment Division North,

80 Fifth Street East

St. Paul, MN 55101-1678

corps island Dredged Material Environmental Assessment public notice St. Paul District