Such atypical situations occur throughout the United States, and all of these 

 cannot be identified in this manual. 



13. Certain wetland types, under the extremes of normal circumstances, 

 may not always meet all the wetland criteria defined in the manual. Examples 

 include prairie potholes during drought years and seasonal wetlands that may 

 lack hydrophytic vegetation during the dry season. Such areas are discussed 

 in PART IV, Section G, and guidance is provided for making wetland determina- 

 tions in these areas. However, such wetland areas may warrant additional 

 research to refine methods for their delineation. 



14. Appendix A is a glossary of technical terms used in the manual. 

 Definitions of some terms were taken from other technical sources, but most 

 terms are defined according to the manner in which they are used in the 

 manual. 



15. Data forms for methods presented in PART IV are included in 

 Appendix B. Examples of completed data forms are also provided. 



16. Supporting information is presented in Appendices C and D. 

 Appendix C contains lists of plant species that occur in wetlands. Section 1 

 consists of regional lists developed by a Federal interagency panel. Sec- 

 tion 2 consists of shorter lists of plant species that commonly occur in wet- 

 lands of each region. Section 3 describes morphological, physiological, and 

 reproductive adaptations associated with hydrophytic species, as well as a 

 list of some species exhibiting such adaptations. Appendix D discusses proce- 

 dures for examining soils for hydric soil indicators, and also contains a list 

 of hydric soils of the United States. 



Use 



17. Although this manual was prepared primarily for use by Corps of 

 Engineers (CE) field inspectors, it should be useful to anyone who makes wet- 

 land determinations for purposes of Section 404 of the Clean Water Act. The 

 user is directed through a series of steps that involve gathering of informa- 

 tion and decisionmaking, ultimately leading to a wetland determination. A 

 general flow diagram of activities leading to a determination is presented in 

 Figure 1. However, not all activities identified in Figure 1 will be required 

 for each wetland determination. For example, if a decision is made to use a 



