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<br /> <br />Construction of a road cut through this material can result in <br />some detrimental effects, especially if they are not anticipated <br />The Standard Penetration Tests indicate that the clay is hard <br />This also means that the clay is more dense (high !bs/cf.) which <br />adds more weight to the slope. Under ideal conditions this <br />characteristic doesn't present a problem Adding water to the <br />material and increasing the slope (or undercutting the slope) will <br />add to instability problems. The other problem with this material <br />is that its swelling potential is quite high. The addition of water <br />to the slope could cause revealing of the slope. <br />The north side slope of the pond averages slopes of 1.5:1. It is likely that at least the lower <br />portion of the slope will become saturated, greatly increasing chances of failure. Should failure <br />occur, loss of topsoil would occur on the undisturbed slope above the cut. ALso, repair of a <br />failed slope would likely create more disturbance than would reducing the slope now. Based <br />on the factors discussed above, the Division is not confident of the integrity of the constructed <br />pond. The stability of the slope could be enhanced and or verified by either (1) reducing the <br />slope to at least 2:1, or (2) providing the Division with a recertification of the constructed <br />design of the pond, committing to monthly monitoring of stability monument MS-7 with results <br />submitted to the Division quarterly. <br />If you or any other members of your staff have questions or would like to discuss these issues, <br />please contact me. <br />Sincerely, <br />~a,a,u L ?Zl~~t~1.~-l,_ <br />Susan L Morrison <br />Reclamation Specialist <br />SLM\092892. WP <br />ary en t 2 eptem er , 1 <br />