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Table 1 (continued) <br />z=tment C -Factor P -Factor <br />TERRACING <br />Must contain 10 -year runoff volumes without overflowing, <br />otherwise P -Factor = 1.00 <br />SIM?. (1) <br />1 to 2 . . . . . . . . . . . . . . . . . 1.00 0.12 <br />3 to 8 . . . . . . . . . . . . . . . . . 1.00 0.10 <br />9 to 12 . . . . . . . . . . . . . . . . 1.00 0.12 <br />13 to 16 . . . . . . . . . . . . . . . . 1.00 0.14 <br />17 to 20 . . . . . . . . . . . . . . . . 1.00 0.16 <br />> 20 . . . . . . . . . . . . . . . . 1.00 0.18 <br />GRASS BUFFER STRIPS TO FILTER SEDIMENT LADEN SHEET FLOWS <br />Strips must be at least 125 feet wide and have a ground <br />cover value of 50% or greater, otherwise P -Factor = 1.00. <br />Basin Slone <br />0% to 10% . . . . . . . . . . . . . . . 1.00 0.60 <br />10% to 24% . . . . . . . . . . . . . . . 1.00 0.80 <br />NOTE: Use of other C -Factor of P -Factor values reported in this <br />table should be substantiated by documentati= <br />C -FACTOR VALUES FOR ESTABLiSHED <br />GRASS AND GROUND COVF-R <br />C -FACTOR <br />0.40 <br />0.35 <br />0.30 <br />0.26 <br />N. <br />0.20 <br />0.15 <br />0.10 <br />0.06 <br />0.00 <br />0 10 20 30 40 60 60 70 80 90 100 <br />ESTABLISHED GRASS GROUND COVER W <br />GROUND COYER REPRESENTS THE PORTION OF <br />TOTAL SOIL SURFACE AREA OCCUPIED BY <br />GRASS WHEN VIEWED FROM ABOVE <br />Figure 9: C -Factors for Established Grass (from HDI, Jan, 1991). <br />