Engineers Corps May 14, 2008 – Federal Register Recent Federal Regulation Documents

Intent To Prepare a Draft Environmental Impact Statement for the Expansion of an Existing Sand and Aggregate Mining Operation Proposed by Aggregate Industries in a Backwater Area of the Mississippi River in Cottage Grove, MN
Document Number: E8-10782
Type: Notice
Date: 2008-05-14
Agency: Department of Defense, Department of the Army, Corps of Engineers, Engineers Corps, Army Department
Aggregate Industries is proposing a project that will require a St. Paul District, Corps of Engineers (Corps) permit for excavation within a navigable water and to discharge dredged material into waters and wetlands during an aggregate mining operation. Specifically, Aggregate Industries is proposing to dredge and excavate sand and gravel in approximately 230 acres of backwater area adjacent to the main channel of the Mississippi River. A berm would be constructed in the river upstream of the mine area to minimize current velocity in the mining area and to reduce turbidity. Sand and gravel would be excavated using a clamshell-type dredge to a maximum depth of approximately 200 feet. Dredged material would be transported via a conveyor system from the dredge to an existing sand and gravel processing plant located on Grey Cloud Island. Excess sand not used for berm construction would be returned to the mined area. A specific compensatory mitigation plan has not yet been developed for the project. Aggregate Industries intends to work with interested federal and state agencies to develop an acceptable plan that would meet federal and state compensatory mitigation requirements. The project requires Corps of Engineers approval under Section 10 of the Rivers and Harbors Act of 1899 and under Section 404 of the Clean Water Act. The final environmental impact statement will be used as a basis for the permit decision and to ensure compliance with the National Environmental Policy Act (NEPA).