Laserfiche WebLink
deadhead in the drainage itself. Exhibit 13-15 provides the anticipated cut and fill work <br />• to be done in the drainage and also shows the clearances needed under each of the four <br /> powerlines. Table 1 contains the volumes associated with the work underneath the <br /> powerllnea. The road will travel 600 feet to [he south when leaving the drainage. The <br /> final 1700-foot section will head to the southeast, tying back into Haul Road "A" a[ <br /> Station 61+00. This entire section of road will be approximately 60 foot wide. The <br /> dragline will then follow the rest of Haul Roads "A^ and "B' to the boxcut stripping area. <br />Dragline Movement . <br />The 650-B Ss considered a ualklnq dragline. Th15 means there are two walking shoes <br />located on each side of the machine. The shoes are connected to a large shaft by means of <br />cams that are attached to the frame of the machine. When the dragline Ss Sn.a digging <br />motion and sitting on its base Itub/, these shoes are Sn an elevated position and rotate <br />with the upper house as the machine swings on circular rails and rollers. <br />When the machine 15 ready to be moved, the operator swings the revolving frame until the <br />rear of the machine Ss pointetl Sn the direction of travel. The propel mechanism will be <br />• engaged and the motors begin to rotate the walking shaft. The first quarter turn of the <br />shaft will move the shoes toward the back end cf the machlr.e and as the eccentric shaft <br />continues to move, the shoes will contact the ground well behind the center of gravity. <br />As the shaft continues to totals, the rear of the machine Ss raised. Whert the machine <br />house is raised, Sifting hooks will then raise the rear portion of the tub almost <br />vertically. The third quarter of cotatlon on the shaft will move the shoes horizontally <br />toward Che front of the machine, which Sn turn will cause the machine to move backward <br />with the front of the tub dragging the ground. The center of gravity of the machine is <br />slightly forward of the propel shaft so that only the rear of the machine is raised. The <br />function of the walking mechanism Ss not to lift the entire machine off the ground during <br />walking. It is meant to raise the rear edge of the tub and slide the front edge over the <br />ground. On the last quarter cycle of the propel shaft, the shoes will gently lower the <br />tub to the ground and raise the shoes to a digging position. This cycle Ss then <br />continuously repeated. The method for steering the dragline allows turns Sn any degree <br />without disturbing additional ground. A minimum road width of 60 feet viii be required to <br />walk the dragline safely. Some specific statistics for the 650-B are: <br />Length of step 7'6" <br />• Walking speed 0.18 mph <br />Ground-bee ring pressure 9.6 psi <br />13-10-3 Revised 08/23/96 <br />