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permeability of a disturbed soil. Site collected soil samples were used to determine the inputs for <br />calculating the post -mining K Factor. <br />K Factor for Section 16 Phase II Bond Release <br />Pre -Mining Percent <br />Sol Symbol K Fiactor Acres Weight <br />Weighted <br />K Fiactor <br />Phase H Bond Release Block <br />Sand <br />35.5 <br />sift <br />34.1 <br />Clay <br />Cam ss Fine Sandy Loam <br />25 <br />0.24J27.1 <br />Structure Code <br />0.2% <br />0.001 <br />Cam ss Fine San Loam <br />26 <br />0.241.1% <br />10.5 <br />14.5 <br />0.003 <br />Codreho Loam <br />37 <br />0.28 <br />324 <br />2.508 1 <br />30.4% <br />0.085 <br />Jer Cocheto Complex <br />108 <br />0.287.8% <br />0.022 <br />Mora Loam <br />135 <br />0.32 <br />60.5% <br />0.194 <br />Average <br />O.W- <br />Post-Mining K Factor Inputs <br />Parameter Value <br />Texture % <br />45.30 <br />Sand <br />35.5 <br />sift <br />34.1 <br />Clay <br />30.4 <br />Organic Matter % <br />1 <br />Structure Code <br />4 <br />Perrneability, Class <br />K -Factor <br />3 <br />0.228 <br />Length Slope Factor LS <br />Representative slope lines were draped onto the pre -mining and post -mining topography in AutoCAD <br />to provide slope lengths and gradients (Map 2). The table below presents the LS Factors calculated for <br />each slope using RUSLE 1.06c. <br />LS Factor for Section 16 Phase II Bond Release <br />CanopV Cover % <br />45.30 <br />44.50 <br />Rock Cover % <br />Pre -Mining <br />0.60 <br />Utter Cover % <br />Post -Mining <br />38.05 <br />Slope 1 Slope 2 Slope 3 Slope 4 Slope 1 Slope 2 Slope 3 <br />Slope 4 <br />Gradient % <br />11.7 <br />10.9 10.3 <br />13.6 <br />14.2 <br />10.5 <br />14.5 <br />17.5 <br />Le ft <br />LS -Factor <br />524 <br />2.245 <br />760 611 <br />2.179 1.900 <br />324 <br />2.508 1 <br />524 <br />4.617 <br />760 <br />3.338 <br />611 <br />5.118 <br />324 <br />4.953 <br />Vegetative Cover Factor C <br />Data collected for baseline efforts (pre -mining) and Phase II evaluations (post -mining) were used to <br />determine C Factors. The table below presents the C Factors calculated using RUSLE 1.06c for each <br />vegetation community and timeframe along with the inputs used to derive those results. <br />C Factor for Section 16 Phase II <br />INEENEEN <br />Area Section 16 <br />Pre -Mining Post -Mining <br />Parameter (Baseline) (Revegetation) <br />CanopV Cover % <br />45.30 <br />44.50 <br />Rock Cover % <br />1.20 <br />0.60 <br />Utter Cover % <br />45.14 <br />38.05 <br />Fall Weight ft <br />4.0 <br />2.0 <br />Effective Root Mass (lbs/ac) <br />1359 <br />1335 <br />Roughness Index <br />0.9 <br />1.1 <br />Land Use Index <br />C -Factor <br />4 <br />0.0117 <br />4 <br />0.0259 <br />17 <br />