Subpart B - Wetland Criteria 



512.13(a) 



(iii) are named for wet miscellaneous areas that 

 meet hydric water table, ponding, or flooding criteria. Examples 

 include riverwash, beaches, playas, or water (these are only 

 exEunples and may not meet hydric water table, flooding, or ponding 

 criteria for a particular county.) 



(4) To compile the list of hydric soil map units in 

 counties that do not have a soil survey, use the soil 

 identification legend. 



(5) In some survey areas soils have been renamed to 

 match current data and interpretations. If the updated map unit 

 names do not match pxiblished names, include justification 

 statements for those name changes that have moved the map unit from 

 hydric to nonhydric or vice versa. These statements must address 

 the reason and data that support the name change. Include the 

 supporting data in Section II of the Field Office Technical Guide 

 or the official copy of the soil survey report. The procedures for 

 updating maps and names are described in Part 602 of the National 

 Soils Handbook. 



(6) Include a list of spot symbols that indicate small 

 areas of wetness in map unit delineations. These lists of spot 

 symbols further identify map units that may contain hydric soil 

 inclusions. These symbols are shown on the Conventional and 

 Special Symbols Legend (SCS-SOI-37A) for a county. 



{512.12 Criteria for wetland hydrology. 



An area exhibits wetland hydrology if during a significant part of 

 the growing season in years of normal precipitation, the area is 

 permanently or periodically inundated, or soil is saturated to the 

 surface. 



{512.13 Prevalence of hydrophytic vegetation. 



(a) Determining prevalence . 



(1) A prevalence of hydrophytic vegetation is determined 

 by visually estimating the percent cover of obligate or facultative 

 wet plant species (as provided in the National List of Plant 

 Species That Occur in Wetland) as compared to those that are 

 classified as facultative upland or upland species. If obligate 

 and facultative wet plant species cover a greater percent of the 

 area than facultative upland and upland plants, the area has a 

 prevalence of hydrophytic vegetation. Document the basis for this 

 a determination. 



512-13 

 (180-V-NFSAM, Second Ed., Amend. 6, May 1991) 



