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New National Wetland Plant List
Effective May 1, 2016, a new wetland plant list (NWPL) will be made available by the U.S. Army Corps of Engineers, in cooperation with the U.S. Environmental Protection Agency, U.S. Fish and Wildlife Service and the U.S. Department of Agriculture Natural Resources Conservation Service. The NWPL is used to determine whether the hydrophytic vegetation parameter is met when conducting wetland determinations under Oregon’s Removal-Fill Law, the Clean Water Act, and the Wetland Conservation Provisions of the Food Security Act.
Any wetland delineation performed (field work) on or after May 1, 2016, will need to use the new list. DSL will accept determinations and delineations based on the former indicator status list (2014) if the field work was completed before May 1. It is important that any delineation work performed before May 1 reference which list was used. 
The wetland plant list was first published by the U.S. Fish and Wildlife Service in 1988 and contained 6,728 species. The latest process began in 2015 and included the review by Regional Panels (RP's) the National Panel (NP), and the public, whom provided input on changes to the wetland indicator status of 1,689 species. The updated 2016 list contains 8,092 species. The 2016 list contains changes in plant indicator status (OBL, FACW, FAC, FACU, and UPL designations)  from the 2014 list for 186 species found in the CONUS. A summary of rating changes by region and the response to the technical comments is available at: http://wetland_plants.usace.army.mil/