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• Table 4.3.3-1 Hydrograph Response Shape (HRS) and Maximum (Max) Lengths of Overland <br />Flow <br />Ground Cover Slopes less than or equal to <br />25 Slopes over 25 <br /> HRS Max Length HRS Max Length <br />Oak Brush, etc. S 225 M 175 <br />Soil Guard S 175 M 150 <br />Bare Soil (loose) M 125 F 100 <br />$are Soil (compacted <br />hardstands and roads) and <br />vegetated areas subject to <br />disturbance by traffic F 125 none encountered <br />Graveled Areas F 175 none encountered <br />4.4 Control Practice Factor <br />The SEDCAD+ Model considers the sediment loss from an area with a given cover and <br />conservation practice to that of a field in continuous fallow by introduction of a Control Practice <br />• (CP) Factor. The CP is a function of Canopy Cover and Percent Ground Cover. Control <br />Practice Factors for watershed areas in this analysis are presented in the following table <br />(reference the SEDCAD+ guide). <br />Table 4.4-1 Contro] Practice Factors <br />Watershed Areas Assessment Control Practice <br /> Factor <br />Undisturbed natu- A conservation practice of "Permanent Pasture, 0.038 <br />ral sites Rangeland, Idle Land, and Grazed Woodland" <br /> was selected as representative of the natural site. <br /> Vegetative cover was assessed as Appreciable <br /> Brush, 2 meters tall, 50% Canopy Cover, 60% <br /> Grass Ground Cover. <br />Cut slopes Assessed as protected with Soil Guard, considered 0.03 <br /> conservative as field performance might approach <br /> 0.001 or better. <br />Fill slopes and Assessed as unprotected bare soil (loose). 0.80 <br />Topsoil Storage <br />Pile slopes <br />• (Lone Pine Gulch SAES Demonstration, l2 October 95, Page 8 of 13) <br />