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<br />ATTACHMENT 2 <br />C VALUE FOR CALCULATIONS OF RE(~UIRED <br />SEDIMENT STORAGE VOLUME FOR THE NORTHERN COAL CO. <br />MEEKER DISPOSAL FACILITY <br /> <br />Categories <br />C Factor A (Tons/ <br />acre-yr <br />Roads 0.5 25 <br />Top Soil Stockpile 0.2 10 <br />Stripped Area 1.0 50 <br />Undisturbed 0.3 15 <br />Compacated Fill 1.0 50 <br />Reclaimed Slopes 0.2 10 <br />The above table demonstrates that the erosion rate from reclaimed fill is <br />expected to be less than that from the natural hillside. This is a result of the <br />cultivation of grasses as well as the introduction of terraces. The greatest erosion <br />wil occur at that point where Phase I is stripped but not yet reclaimed aad the rest <br />of the fill area is natural. <br />