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M92026GE <br />LJ <br />Gulch. An existing culvert is located at the bottom of the road <br />fill. The fill is about thirty three (33) feet high at its maximum <br />section and about thirty six (36) feet wide at the road surface. <br />The fill slopes have an inclination of about 2 to 1 (horizontal to <br />vertical). <br />2.3 Subsurface Conditions <br />The original July 1990 subsurface exploration consisted of <br />observing, describing and sampling the soils encountered in five <br />(5) test holes. The approximate locations of the test holes are <br />shown on Figure 2. The logs describing the soils encountered in <br />the test holes are presented in Appendix A. <br />The test holes encountered aggregate base course varying in <br />• <br />thickness from about ten (10) inches to about sixteen (16) inches. <br />The subgrade material encountered consisted generally of sandy and <br />gravelly clay. The sand and gravel content varied between test <br />holes. <br />3.0 PAVEMENT SECTION THICKNESS DESIGN RECOMMENDATIONS <br />It is our understanding that the plans are to upgrade the haul <br />road by addition of aggregate base course. Based on information <br />provided by Mr. Karl Koehler we understand that the traffic load <br />will be thirty five (35) coal trucks per day at about twenty eight <br />(28) tons each for a maximum of three (3) days per week. Our <br />analysis is based on the anticipated traffic and an R-value of the <br />3 <br /> <br />~Lam6ert anD ~,oootiateo <br />GO NSULTmG GEOTEGR NiCAL ENGINEERS AND <br />MATERIAL TESTING <br />