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Fa rticle Site Oistrrbutions The particle size distribution for this sedimentation pond • <br />was based on sieve and hydrometer analysis of various soil types in the Yuast permit <br />area. This distribution is representative of the watershed for Pond 011 and based on a <br />weighted average. The specific gravity and the submerged bulk specific gravity of the <br />s osl ate estimated co be 2.50 and 1.17, respectively. <br />Sedimentology Size Analysis <br />ea rticle Size Di stribu[ionls) <br /> <br />Sipe <br />(mml NAT1 <br />8 Finer SPL2 <br />8 Finer <br />12. 7000 100.00 100 <br />11. 2000 96.00 99.9 <br />2. 0000 06.00 99 <br />1. 0000 83.00 91 <br />0. 5000 91.OJ 87 <br />0. 25JU 80.00 B4 <br />0. 1060 75.00 00 <br />G. J45J 41.00 59 <br />0. 0200 20.00 46 <br />0. 0100 12.00 30 <br />0. 005) 8.00 20 <br />o. oJ2o 7.00 le <br />J. JO1J a.oo 14 <br />o. ooJ1 0.0o J <br />Length-Slope Factor ILSI The lengihslope is described as the typical length-slope for <br />the subwatershed and the distance from the poir~t of origin of overland flow io a point <br />where Lhe slope decreases such that signrficant deposition occurs or until the flow <br />enters a defined channel. The length-slope far Fond 011 was determined to be tetween 100 <br />and 200 feet, and the av=cage slope was determined to be 15.0 percent. Following is <br />I4cRoo1 et al's. (1907) i5 equation: <br />LS = 1 L Im 117,2 sin - 0.55) fur S ? 08 <br />72.5 <br />LS = 1 200 )0'6 (17.? sin 15.0° - 0,55) <br />72.6 <br />LS = 1.04 (4.45 - 0.551 <br />LS = 7.2 <br />u <br />13-4A-6 Revised 12/12/97 <br />