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Scope of Work <br />Page 4 <br />3.3.3 Beam Placement - Immediately upon completion of <br />each drill hole, a beam will be placed and cemented. <br />The possible exception to this is holes that are PVC <br />cased. Beams placed and cemented will be plumbed and <br />braced to prevent movement while the concrete cures. <br />Concrete will be poured to a point approximately 2 <br />feet above the bedrock colluvium interface. A <br />vibrator will be used during cementing. <br />3.3.4. Excavation - Upon completion of placement of <br />several beams and at the discretion of West Elk <br />Engineering, excavation to bedrock between the beams <br />will begin. The number of beams to be excavated at <br />any one time will be decided by West Elk Engineering. <br />Cross sections are provided showing approximate <br />configuration of excavations and amounts of material <br />to be excavated (Drawing Nos. 2201.6 - 2201.9). <br />Excavation to bedrock is expected to move in sections <br />as drilling progresses and as forming and pouring of <br />wall panels advances behind the excavations. <br />3.3.5. Concrete Wall Panels - The 8 foot section between <br />soldier beams from bedrock to the top of the beams <br />will be reinforced with rebar, formed and filled with <br />concrete. The forms are owned by West Elk Coal <br />Company and are on site from a previous project. <br />Rebar sizes and placement are shown in Drawing # <br />2201.1. Concrete will be 3000 PSI, 5 1/2 sack mix <br />(Exhibit D). Rebar will be welded to beams as shown <br />in Drawing # 2201.1. More than one wall panel maybe <br />poured at one time at the discretion of West Elk <br />Engineering. <br />