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Control Practice Factor, CP. The control practice factor is defined as the ratio <br />of sediment loss from an area with a given cover and conservation practice to that <br />of a field in continuous fallow. <br />Using Table 5.5c CP in the SEDCAD+ Users Manual, page 125: <br />Undisturbed (Premine) Condition <br />Type and Height of Raised Canopy: Canopy of Tall Weeds and <br />Short Brush (.5m fall height) <br />Canopy Cover: 75 °k <br />Percent Ground Cover: 56 <br />CP:.037 <br />Reclaimed (Postmine) Condition <br />Type and Height of Raised Canopy: Canopy of Tall Weeds and <br />Short Brush (.Sm fall height) <br />Canopy Cover: 50 <br />Percent Ground Cover: 80 <br />CP:.012 <br />Reclaimed Pit 4 <br />Type and Height of Raised Canopy: Canopy of Tall Weeds and <br />Short Brush (.5m fall height) <br />Canopy Cover: 50 <br />Percent Ground Cover: 50 <br />CP:.07 <br />Disturbed <br />Condition: Seeded and fertilized, fresh, unprepared seedbed <br />CP:.64 (fable 5.Sa) <br />Rainfall Factor, R. An average annual R value and an average storm R value is <br />• needed to compute long-term erosion, in order to calculate the annual sediment <br />9 <br />