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,,i ~, <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman 51.. Room ?15 <br />Denver, Colorado 80203 DIVISION O F <br />Phone (303) 8663567 MINERAL S <br />FAR (303) II32-8106 & <br />GEOLOGY <br />RECLAMATION <br />MINING•SAFETY <br />INTEROFFICE Bill Owens <br /> Governor <br />MEMORANDUM <br /> Greg E. Walther <br /> Executive Dvetlor <br />TO: Dave Berry Michael B. Lang <br />Division Director <br />FROM: Jim Stark~~~~ <br />SUBJECT: Reclamation Cost Estimate for Roadside Portal's TR-33 <br />DATE: 13 December, 2000 <br />Attached is the reclamation cost estimate for Roadside Portal's Technical Revision 33 - <br />Permanent Mine Water Plan. The estimate is 10 tasks (task 0 and task X01 -X09) and <br />represents an increase in liability of $103,317.00. <br />Several Assumptions were made in calculating this estimate. First, for tasks X02 and <br />X07, the volume of the cut for the drill pad is based on Figure 14-8. The cross sectional <br />area of the pad is 550 ft2 and runs a length of 100 ft. This gives a total cut volume of <br />5500 ft3 (or 2100 yd3). Bank cubic yards were used because it appeared that this area is <br />undisturbed. Second, for tasks X01 and X08, the volume of topsoil to be salvaged was <br />estimated at six inches over the half-acre disturbance (800 yd3). Bank cubic yards were <br />again used because it appeared that this area is undisturbed. Third, for task X03, R.S. <br />Means does not have "good" numbers for drilling wells at an angle so, after talking with <br />mike Boulay, I called Layne-Western and received an estimate of what they would <br />charge. This estimate did seem reasonable when compared with Section 022 270 010 - <br />Horizontal Boring. Fourth, for task X04, it appears from Figure 14-8 that the dewatering <br />pipe travels 180 ft. from the angled drill hole at a depth averaging 20 ft. This task uses <br />these assumptions for excavating, installing the pipe and backfilling. Finally, for task <br />X06, the worst-case scenario of the Division needing to fill the hole if it does not work <br />was taken into account. <br />Please let me know if you have any questions regarding this estimate or the assumptions I <br />have made. <br />