for the original two observation points often will provide a 

 clue as to the parameter(s) that change between the two povnts. 

 c When the wetland boundary is found, mark the boundary location 

 -* on the base map and indicate on the DATA FORM 1 that this 

 represents a wetland boundary. Record the distance of the 

 boundary from one of the two regular observation points. Since 

 the regular observation points represent known distances from 

 the baseline, it will be possible to accurately pinpoint the 

 boundary location on the base map. PROCEED TO STEP 19. 

 , STEP 19 - Make Wetland Determinations at All Oth er Required Observa- 

 tion Points Along All Transects. Continue to locate and sample all 

 required observation points along all transects. NOTE: The procedure 

 described in STEP 18 must be applied at every position where a wetland 

 boundary occurs between successive observation points. Complete a DATA 

 FORM 1 for each observation point and PROCEED TO STEP 20. 

 , STEP 20 - Synthesize Data to Determine the Po rtion of the Area Con- 

 taining Wetlands. Examine all completed copies of DATA FORM 1 

 (STEP 19), and mark on a copy of the base map the locations of all ob- 

 servation points that are wetlands with a W and all observation points 

 that are nonwetlands with an N. Also, mark all wetland boundaries 

 occurring along transects with an X. If all the observation points are 

 wetlands, the entire area is wetlands. If all observation points are 

 nonwetlands. none of the area is wetlands. If some wetlands and some 

 nonwetlands are present, connect the wetland boundaries (X) by follow- 

 ing contour lines between transects. CAUTION: If the determination is 

 considered to be highly controversial, it may be necessary to be more 

 precise in determining the wetland boundary between transects. This is 

 also true for very large areas where the distance between transects is 

 greater. If this is necessary, PROCEED TO STEP 21. 



, STEP 21 - Determine Wetland Boundary Between Transects. Two proce- 

 dures may be used to determine the wetland boundary between transects, 

 both of which involve surveying: 



a Survey cont our from wetland boundary al ong transects. The 

 -* first method involves surveying the elevation of the wetland 

 boundaries along transects and then extending ^1;^ .^"^^^^ J" ^ 

 determine the same contour between transects. This procedure 

 will be adequate in areas where there is no significant eleva- 

 tional change between transects. However, if a significant^ 

 elevational change occurs between transects, either the sur 

 veyor must adjust elevational readings to accommodate such 

 chLges or the second method must be used. NOTE: The surveyed 



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