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- 11 - <br />accordance with the requirements of 30 CFR 817.93. The factors of <br />• safety against a slope failure for static and pseudo-static case are <br />1.58 and 1.38 with earthquake acceleration equaling 0.059 respectively. <br />These factors of safety exceed the minimum required safety factors of <br />1.5 and 1.2. <br />The soil properties used in the analysis are shown on the figure <br />and were determined bi laboratory testing as discussed above. <br />Construction Considerations: <br />A. Finbankment. <br />The existing ertbanlanent will be rennved and reconstructed. It is <br />recommended that all topsoil, organics and other deleterious <br />materials beneath the existing e~obankment be removed from the <br />construction area. The slope beneath the new ent+anlrnient should be <br />bend~ed prior YA fill placement to allow the fill to be placed and <br />• ooapacted in horizontal layers. This will also improve the <br />stability of the en~banlanent in the sidehill fill section. <br />The existing eTibaniQnent soils are reusable in the reconstructed <br />dam providing topsoil and organics are removed prior to fill <br />placement. 7nported fill should consist of clays having a maximum <br />liquid limit of 45 and a maximum plasticity index of 20. Soils <br />are available locally rich meet this criteria. A soil engineer <br />should approve proposed borrow materials prior to fill place- <br />ment. <br />Fill should be placed in maximum 8-ind~ loose horizontal layers <br />and o7mpacted to at least 958 of standazd Proctor dry density <br />(ASTM D-698) within 29 of optimum uuisture content. A minimum of <br />