The U.S. Army Corps of Engineers has permitting authority over activities affecting waters of the United States. Waters of the United States include surface waters such as navigable waters and their tributaries, all interstate waters and their tributaries, natural lakes, all wetlands adjacent to other waters, and all impoundments of these waters. To find the navigable waterways in the Sacramento District,click here.
Two federal statutes mandate Corps jurisdiction over navigable waterways and adjacent wetlands. These are Section10 of the Rivers and Harbors Act of 1899 and Section 404 of the Clean Water Act. Section 10 of the Rivers and Harbors Act applies to all navigable waters of the United States and Section 404 of the Clean Water Act applies to all waters including wetlands that have sufficient nexus to interstate commerce. The diagram below illustrates the lateral limit where Section 10 and Section 404 apply. (Click Image below for full size graphic).