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TABLE 1 <br />C FACTORS <br />Area % Canopy Type % C <br /> and Height Ground Factor <br /> Cover <br />Tipple Reference Area 25%/0.5m W 45.4 0.117 <br />Tipple Reclamation 0% G 58.3 0.047 <br />Notes: % ground cover includes litter and standing dead. <br />G - majority of ground cover is grass <br />W - majority of ground cover is broadleaf <br />2.5 SUPPORT PRACTICE FACTOR (P) <br />The P factor represents practices designed to control erosion. For existing conditions, a P factor of 0.8 <br />was used to account for the rough soil conditions from disking along contour and seed drilling. For pre- <br />mine conditions a P factor of 1.0 was used. <br />3.0 RESULTS <br />Calculation spreadsheets showing all inputs and results are attached. A summary of the results are <br />shown in Table 2. <br />TABLE 2 <br />RESULTS <br />Area Annual Sediment Yield <br />tons/acre/ ear <br />Ti ple Reference Area .08 <br />Tipple Reclamation .03 <br />As shown in Table 2 sediment yield for the post-mine conditions are less than pre-mine conditions. <br />4.0 REFERENCES <br />Barfield, B.J., Warner, R.C., Haan, C.T., 1981. Applied Hydrology and Sedimentology for <br />Disturbed Areas. <br />Kent Crofts, 2009. Revegetation Monitoring Report For Reclaimed Areas Sampled In 2009 On The <br />Kerr Coal Company's Marr Mine, 2009 <br />Attachments: (Calculation Spreadsheets)