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Pine Valley Creek (30602) downstream of the bridge at Old Highway 80.

Table C-1.   Calculation of runoff curve number for Pine Valley Creek 2 lateral subbasin (topological number 30602).1

SymbolGround cover/
land use 		Hydrologic
condition 		Soil group CN No. of
grid points 		Partial CN
IP Irrigated Pasture good A 33    
      B 58    
      C 72 1 0.396
      D 79    
AG Annual Grass good A 38 1 0.209
      B 61 2 0.670
      C 74 2 0.813
      D 80    
BC Broadleaf Chaparral good A 31    
      B 57    
      C 71 1 0.390
      D 78    
NC Narrowleaf Chaparral fair A 55 10 3.022
      B 72 2 0.791
      C 81 53 23.588
      D 86 66 31.187
OB Open Brush good A 41 1 0.225
      B 63    
      C 75    
      D 81    
WO Woodland good A 28 25 3.846
      B 55 4 1.209
      C 70 7 2.692
      D 77    
WG Woodland Grass good A 33 1 0.181
      B 58 2 0.637
      C 72 1 0.396
      D 79    
ME Meadow good A 30    
      B 58 2 0.637
      C 84    
      D 78    
PG Perennial Grass good A 38    
      B 61    
      C 74 1 0.407
      D 80    
  Total       182 71

1  The method is explained in the Hydrology Manual of San Diego County (1985).