The current Federal delineation manual, dated January 1987, used in the Clean Water Act Section 404 regulatory program for the identification and delineation of wetlands. Except where noted in the manual, the approach requires positive evidence of hydrophytic vegetation, hydric soils, and wetland hydrology for a determination that an area is a wetland.
If you click on the link above and the target URL does not connect to a U.S. Federal website (i.e. does not send you to a .gov or .mil address), the following disclaimer applies:
Links to any non-Federal organizations are provided solely as a service to our users. These links do not constitute an endorsement of these organizations or their programs by FedCenter.gov or the Federal Government, and none should be inferred. Any reference to a commercial product, process, service, or company is not an endorsement or recommendation by the U.S. government, FedCenter, or any of its partners. FedCenter.gov is not responsible for the content of the individual organization Web pages found at these links.