Official websites use .mil
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Corps of Engineers Sites
Mississippi Valley Division Regulatory program
Wetland Delineation publications
Regional Supplement to Corps Wetland Delineation Manual: Midwest Region
Fillable Form for Midwest Supplement
Regional Supplement to Corps Wetland Delineation Manual: Northcentral and Northeast Region
Fillable Form for Northcentral and Northeast Supplement
Regional Supplement to Corps Wetland Delineation Manual - all areas
National Wetland Plant List
Iowa Excluded Species List
Conservation Easements and Covenants
Covenants
Regulatory Guidance Letters
Flood Damage Cleanup, Repair, Permits (Updated 2023)
Endangered Species
Iowa Species
Missouri Species
Technical and Biological Resources
Corps Laws and Regulations
Legal Issues
Rapanos-Carabell Guidance
Historic Properties
State Agency Web sites
Illinois Environmental Protection Agency
Illinois Department of Natural Resources
Missouri Department of Natural Resources