40480 Federal Register / Vol. 56, No. 157 / Wednesday. August 14. 1991 / Proposed Rules 



hydrology criterion) document wetland 

 hydrology; or 



• One or more primary hydrologic 

 indicators (item 3 of wetlands hydrology 

 criterion] is docvunented to have been 

 found at the site; or 



• One or more secondary hydrologic 

 indicators are materially present and 

 supported by corroborative information 

 as described in item 4 of wetlands 

 hydrology criterion (e.g., regional 

 indicators of saturation, hydrologic 

 gauge data. NWI maps). 



If no. the area is non-wetland. 



If yes, the area is a wetland; docxunent 

 the reasons for this conclusion. The 

 upper boimdary of these wetlands is 

 established by the limits of the 



combination of the weUand hydrology 

 indicators present and hydric soil. 



2b. Is the plant community growing on 

 a soil that meets the hydric soil 

 criterion? 



If no, the area is non-weUand. 



If yes, doomient the reasons for this 

 conclusion and go to 3b. 



3b. Does the area demonstrate a 

 regional indicator of saturation? 



If no, go to 5b. 



If yes. go to 4b. 



4b. Does the area support a plant 

 community that meets the hydrophytic 

 vegetation criterion? 



If no, the area is non-wetltmd. 



If yes, the area is a wetland. 

 Document the reasons for this 



conclusion. The upper boundary of this 

 wetland is established by the limits of 

 the combination of hydrophytic 

 vegetation, hydric soils, and the regional 

 indicators of saturation present. 



5b. Does the plant community have a 

 mean prevalence index of less than 3.0? 



If no, the area is non-wetiand. 



If yes. the area is wetland; dociunent 

 the reasons for this conclusion. The 

 upper boundary of this weUand is 

 established by the limits of the 

 combination of the weUand vegetation 

 as described in this step and hydric 

 soils. 

 [FR Doa 91-19418 Filed 8-13-91; 8:45 am] 



BILUNO COOC SSSO-SO-M 



