Corps of Engineers Sites

• USACE Headquarters Regulatory Program 

• Mississippi Valley Division Regulatory program

• Navigable waters in Rock Island District

 Wetland Delineation publications

• Wetland Delineation Manual (Y-87-1)

• 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

• Conservation Easements

• Covenants

Regulatory Guidance Letters

Flood Damage Cleanup, Repair, Permits (Updated 2023)

• Illinois Flood Damage  
• Iowa Flood Damage   
• Missouri Flood Damage 

Endangered Species

• Illinois Species

• Iowa Species

• Missouri Species

Technical and Biological Resources

Corps Laws and Regulations

Legal Issues

• SWANNC

• Rapanos-Carabell Guidance 

Historic Properties

State Agency Web sites

• Iowa Department of Natural Resources

• Illinois Environmental Protection Agency

• Illinois Department of Natural Resources

• Missouri Department of Natural Resources