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2-9B <br />• Tree r~?ad cuts at .t ati~?ns 42+1'2 and 47+61} will be ire a colluvial <br />material, and soil parameters !.f ~1 = 15 degrees, I~ = l,:~po F'8F and <br />a density of 1_:1] lt~/cu,ft, we-rc used. These parameters are from <br />previous testing along the Munger haul road. Calculated factors <br />of sarety during tha ~~peratiorlal period are 1.72 and 1./-•1, <br />respectively. The une Cut that e:iceeds the slope limitations ...f <br />1.~H:iV 15 lOC3ted 3t =~t3t1!~rl 22+1111 of the MU_lane I_3nyprl 3CCess <br />r~?ad. Thais cut was designed with a sl~?pe of 1H: 1V. This was <br />necessary to pr!%vide the required access road and convey?r <br />corridor in the limited space between East Salt Crock and the <br />hillside to the cast. <br />Alth!~ugh surrourn~in~7 outcrops indicate that most ~?f this cut will <br />• tic in rack, a more cc~r~servative apprc~acY~ was ta4:en whereby it was <br />355Urried that tree cut will tie in soil with a stiff boundary, <br />r.?ugF,ly paralleling the upper slope. This is c~?r~firmed try trio <br />immediate outcr~~ps which show that at least the- upper portion of <br />the cut will be in rock. Soil prr.~perties used were those given <br />for c!~lluvial material. Calculated safety factor is 1./-•7 during <br />tY~e opcratic~r~al period. <br />As n~~ted earlier, all of these analyses were made using <br />ass+Jmpti~~ns based c. r. field inspect i•-sns. Their purpose was not tc. <br />calculate "absolute" sarety factors for the cuts, but to provide <br />reasonat~le estimates which would reveal any serious stability <br />prot~len~s. AI-~alyses revealed reclart~ati~~r~ safety factr.~rs fc~r <br />~~riginal ground were- generally above 1.76 for the- colluvial soil. <br />All cuts will be returned to appr~?:~:irt~ate original contour and will <br />5/8/85 <br />