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2.4 CONTROL FACTOR, C <br />The control factor is used to account for vegetative or mulch cover. The following values were utilized in <br />the pond design evaluations (Renard et al, 1996) (Schwab and Warner, 1987): <br />TABLE 3 <br />CONTROL FACTOR <br />COVER COVER TYPE VEGETATION CONTROL FACTOR <br />Undisturbed Mountain Shrub 75% canopy (0.5 m fall height), 40% 0.080 <br /> ground cover <br /> Oak-Aspen 50% canopy (2.0 m fall height), 40% 0.085 <br /> ground cover <br /> Sagebrush (good) 75% canopy (0.5 m fall height), 60% 0.031 <br /> ground cover <br /> Sagebrush (fair) 50% canopy (0.5 m fall height), 40% 0.070 <br /> ground cover <br />Disturbed Topsoil Stripped No appreciable canopy or cover 1.000 <br />Reclaimed Topsoiled and No appreciable canopy or cover 0.800 <br /> Seeded <br /> 1 to 2 Year Growth Rangeland/Continuous Grass, no 0.070 <br /> appreciable canopy, 70% cover <br /> 3+ Year Growth Rangeland/Continuous Grass, no 0.010 <br /> appreciable canopy, 80% cover <br />Exhibit 7 Page 5 Revision Date: 6/19/09 <br />Revision No.: TR-73