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EXHIBIT 27, ITEM 1 <br />'4 •;d^.: tEi'�df§f�J7�"Ri'xxa�TH"�"t+"BtA#txf�:R^�'Airr2'„e':^:s: �Y6 w,�iewm,�^,+r ;aw;, g�.:a^���'l;v-tr*,v.n .Yr;*w, t �t�, . �<: ^t'r... rsk�-..e�+��*F'.�T.. �..�:, �.,�.r �H 4�'t. , y.;.�..; .s .. , . ,, .c , ;;, :, 3..:� <br />I. INTRODUCTION <br />The Collom Haul Road Geotechnical Drilling Program will consist of drilling 15 drill holes (See <br />Exhibit 27) in order obtain data for the Collom haul road design and construction. The area to be <br />drilled occurs in the corridor to be disturbed by construction of the access/haul road from the <br />Gossard Load Out facility to the Collom facility area. Where possible existing ranch roads will <br />be utilized to access as close as possible to the drill hole locations. Once equipment is close to <br />the drill hole locations a small dozer will be used to brush an access (approximately 15” wide) to <br />allow the small track mounted drill rig to access each location. Topsoil stripping will not be <br />necessary for this activity. Areas that will be brushed that are outside of the disturbance <br />footprint (access areas to drill hole locations) will be reseeded in accordance with Volume 15, <br />Table 2.05.9. <br />Four drill holes (CHR -1 through CHR -4) will be drilled adjacent to the Wilson Creek crossing <br />(See Exhibit 27). Borings will be advanced to obtain subsurface geological and geotechnical <br />information at these locations at hole depths of at least 70 feet or 20 feet penetration into <br />bedrock. When possible, bedrock samples will be collected and evaluated for rock quality, rock <br />type, weathering and hardness. <br />Two drill holes (CHR -5 and CHR -6) will be drilled using solid stem auger and air -coring <br />methods as appropriate to approximate depths of 30 to 50 feet for the culvert crossing at Jubb <br />Creek for culvert design input (See Exhibit 27). <br />Nine drill holes (CHR -7 through CHR -15), located along the Collom Access Road corridor (See <br />Exhibit 27), will be drilled using solid stem auger and air -coring methods as appropriate. <br />Borings will be advanced to obtain subsurface geological and geotechnical information at these <br />locations. Subsurface data in cut slope areas are necessary for use in evaluating excavation <br />conditions, cut slopes and the potential use as fill. <br />All borings will be logged by a geologist or geotechnical engineer and recorded on a field -boring <br />log. <br />II. BACLFILLING OF DRILLED HOLES <br />Since all borings will be shallow and not intended to penetrate subsurface coal seams the drill <br />holes will be backfilled with drill cuttings and marked with a wooden stake. Drill-hole locations <br />Exhibit 27, Item 1 Revision Date: 08/10/15 <br />Revision No.: MR -143 <br />