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<br />consist of Mirafi SOOX or an equivalent material. The new gravel section should consist of 8 inches of <br />pit run gravels and 6 inches of Class VI base course. <br />Waste Coal Access Road: Based on the two test holes advanced along the Waste Coal Access Road, it <br />appears that this roadway had 3 to 10 inches of existing road base gravels. The road base gravels were <br />in fair [o poor condition; therefore, a strength coefficient of 0.06 was used for the existing road base <br />materials is the design of the new gravel section. Based on our calculations, we recommend that this <br />roadway be surfaced with as additional 13 inches of pit run gravels and 5 inches of Class VI base <br />course. If the client chooses, an alternative section consisting of a layer of Muafi SOOX fabric or <br />equivalent, 8 inches of pit run and 4 inches of base course may be used. <br />Pond A Access Road: Based on the four test holes advanced along the Pond A Access Road it <br />appears that [his roadway had 9 to 16 inches of existing road base gravels. The road base gravels were <br />in very poor to fair condition; therefore, a strength coefficient of 0.03 was used for the existing road <br />base materials in the design of the new gravel section. Based on ottr calculations, we recommend that <br />this roadway be surfaced with an additional 6 inches of pit run gravels and 4 inches of Class V[ base <br />course. <br />Magazine Access Road: Based on [he two test holes advanced along the Magazine Access Road, it <br />appears that this roadway had 5 to 6 inches of existing road base gravels. The road base gravels were in <br />good condition; therefore, a strength coefficient of 0.10 was toed for the existing road base materials in <br />the design of the new gravel section. Based on our calculations, we recommend that this roadway be <br />surfaced with an additional 4 inches of Class V[ base course. <br />SW Bleeder Shah Access Road: Based on the two test holes advanced along the SW Bleeder Shaft <br />Access Road, i[ appears that [his roadway had 3 to 6 inches of existing road base gravels. The road <br />base gravels were in fair to good condition; therefore, a strength coefficient of 0.09 was used for the <br />existing road base materials is the design of the new gravel section. Based on our calculations, we <br />recommend that this roadway be surfaced with an additional 6 inches of pit run gravels and 4 inches of <br />Class VI base course. <br />Fish Creek Borehole Access Road: Based on the four test holes advanced along the Fish Creek <br />Borehole Access Road, it appears that this roadway had ~ to 9 inches of existing road base gravels. <br />The road base gravels were in fair to poor condition; therefore, a strength coefficient of 0.06 was used <br />for the existing road base materials in the design of the new gravel section. Based on our calculations, <br />we recommend that this roadway be surfaced with an additional 5 inches of pit run gravels and 4 inches <br />of Class Vf base course. <br />West Escape Shaft Access Road: Based on the three test holes advanced along the proposed West <br />Escape Shaft Access Road alignment, it appears that 1 to 2 feet of topsoil exists a[ the ground surface. <br />The topsoil materials are underlain by clays and silts. Therefore, we recommend that the gravel <br />section to be constructed for this roadway consist of 8 inches of pit run gravels and 4 inches of Class Vl <br />base course. The new gravel section should be placed on the clays or silts [ound below the topsoil <br />Job No. 75-2431 Nonhxst Colorado Consul~an~s, lnc. Pagc 6 <br />