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Laws of the United States and the State of Iowa have assigned the US Army Corps of Engineers (Corps) and the Iowa Department of Natural Resources (IDNR) with specific and different regulatory roles designed to protect the waters within and on the State's boundaries.
A Section 401 Water Quality Certificate is Iowa Department of Natural Resource's certification that a project will not violate state water quality standards and is required before the Corps of Engineers can issue a Section 404 permit.
Construction, excavation or filling in streams, lakes, wetlands, or on the flood plains may require permits from both the Corps and Iowa DNR. A Joint Application Form (Protecting Iowa Waters) shall be submitted to both agencies to begin the permit process for any of the following activities:
The Iowa Department of Natural Resources also requires permits for the construction and operation of water and wastewater treatment facilities, water withdrawal, water storage, and solid waste disposal and should be contacted for information about these permits.
US Army Corps of Engineers: Joint Application Form; Joint Application Form
Chapter 61: Water Quality Standards
US Army Corps of Engineers: Answers to Frequently Asked Questions
Rock Island District - Public Notices
US Department of the Army, Omaha
Omaha District Corps of Engineers
8901 South 154th Street
Omaha, NE 68138-3611