Field Guides & Tools

The following is a partial list of relevant tools for delineating and classifying wetlands. CDOT does not endorse any private companies.

Regional Wetland Delineation Supplements & Automated Data Sheets

National Wetland Plant List

The U.S. Army Corps of Engineers, as part of an interagency effort with the U.S. Environmental Protection Agency, the U.S. Fish and Wildlife Service and the U.S. Department of Agriculture Natural Resources Conservation Service, developed the National Wetland Plant List (NWPL) that is updated often. The NWPL is used to determine whether the hydrophytic vegetation parameter is met when conducting wetland determinations under the Clean Water Act and the Wetland Conservation Provisions of the Food Security Act. The list must be used in all wetland delineations performed.

Ordinary High Water Mark

The U.S. Army Corps of Engineers and the U.S. Environmental Protection Agency jointly announced the availability of the Final National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams (Final National OHWM Manual). The Final National OHWM Manual serves as a non-mandatory technical resource which can be used in appropriate situations to assist with identifying and delineating the ordinary high water mark (OHWM) of rivers and streams located throughout the Nation. The full manual can be found here. 

Other Helpful Tools:

Florence

Wetland Plant Guides

Wetland Soil Guides

Miscellaneous