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M93040GE • • <br />a minimum factor of safety for stable slopes. If a factor of <br />safety of less than 1.5 is used to choose the slope inclination the <br />slope may require future maintenance. <br />A surface water diversion ditch should be constructed at the <br />ton of the slope to intercept surface water above the slope and <br />divert it away from the slope. The slide debris in the existing <br />bench drain ditch should be removed and the bench drain ditch <br />recontoured to promote rapid runoff of collected water. The drain <br />ditches should be lined with an impervious aeotextile lining to <br />reduce the potential for surface water infiltrated into the slope <br />soils. The finished surface of the slopes should be groomed to <br />remove all loose or disturbed soils and provide a relatively <br />uniform surface to promote rapid runoff of surface water. Anv <br />loose or disturbed soils on the face of the slopes should be either <br />removed or recompacted to help improve the integrity and <br />performance of the slope face. We suacest that the slope face be <br />protected farm erosion by either vegetation or aeotextile erosion <br />protective fabric. <br />5.0 POST DESIGN CONSIDERATIONS <br />We suggest that you consider a representative from our office <br />be present full time durino the earthwork operations for <br />geotechnical engineering observation and testing and to correctly <br />interpret the intent of the recommendations presented in this <br />5 <br />~Lambcrr aiiD ~ssoriares <br />CONSUL?`vG GEO'E:.n NBC LL EN GIN EENS •ND <br />MRiE~!`~L ES iING <br />