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III IIIIIIIIIIIII III <br />999 <br />MEMORANDUM <br />TO: Eric Mende <br />Mountain Coal Company - ~ <br />FROM: LeeAnn Bush ~d' c <br />Golder Associates <br />DATE: November 21, 1996 <br />RE: Sylvester Gulch Stability Analysis for Reclamation <br />r <br />Attached are the results of the stability analysis performed in conjunction with the reclamation <br />drawing for the Sylvester Gulch Facilities. The sections analyzed were the same as the ones <br />analyzed for the permitting documents. The pazameters used aze: <br />Moist Unit Weight (pct) 125 <br />Saturated Unit Weight (pcf) 125 <br />Cohesion (psf) 200 <br />Friction Angle 35° <br />A summary of the results are shown below. <br />"= ' <br />~ <br />Y.ocationvf~ om? <br />~ ~ES <br />oil <br />arameters};~~ <br />Haul/Access Road 1.7 <br />Section A-A' <br />Haul/Access Road 2.0 <br />Section B-B' <br />Water Tank Area 1.6 <br />Section C-C' <br />HauUAccess Road 1.8 <br />Section D-D' <br />Water Tank Road 1.5 <br />Section E-E' <br />Substation 1.3 <br />Section F-F' <br />Haul Road 1.6 <br />Section G-G' <br />Sediment Pond 2.0 <br />Section H-H' <br />Shaft Site 1.0 <br />Section I-I' <br />GOIDER ASSOCIATES INC. • DENVER OFFICE <br />200 Union Boulevard. Suite 500 Lakewood. Colorado USA 80'_'_3 <br />