covered by the Act broadly. Although the Act prohibits discharges into “navigable waters,” see CWA §§ 301(a), 404(a), 502(12), 33 U.S.C. §§ 1311(a), 1344(a), 1362(12), the Act’s definition of “navigable waters” as “the waters of the United States” makes it clear that the term “navigable” as used in the Act is of limited import. In adopting this definition of “navigable waters,” Congress evidently intended to repudiate limits that had been placed on federal regulation by earlier water pollution control statutes and to exercise its powers under the Commerce Clause to regulate at least some waters that would not be deemed “navigable” under the classical understanding of that term. United States v. Riverside Bayview Homes, Inc., 474 U.S. 121, 133, 106 S.Ct. 455, 88 L.Ed.2d 419 (1985) (<HOLDING>). Recognizing that Congress intended that the
holding that the united states corps of engineers publication of maps of navigable waters did not constitute affirmative misconduct for equitable estoppel purposes holding that certain wetlands were included within the intendment of waters of the united states because of the evident breadth of congressional concern for protection of water quality and aquatic ecosystems holding that it was unreasonable for a party to rely on maps drafted by the united states corps of engineers that bore the heading waters covered by section 10 of the 1899 rivers and harbors act under the jurisdiction of the st paul district corps of engineers  and the caption that all other waters and wetlands not shown on this map should be considered to be covered by section 404 of the 1972 act to determine whether bodies of water outside the scope of the map were considered navigable holding that wetlands adjacent to navigable waters are included in the term territorial waters holding that the evident breadth of congressional coneern for protection of water quality and aquatic ecosystems supported the army corps of engineers interpretation of waters of the united states to encompass wetlands adjacent to waters as more conventionally defined