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PERMIT AMENDMENT -3- 1/11/95 <br /> EXHIBIT J - VEGETATION INFORMATION <br /> Attached. <br /> EXHIBIT K - CLIMATE <br /> Average temperature - high 850F; low 16°F; avg. precipitation - <br /> 11 . 5" ; avg. snowfall - 32" ; high winds of 30 mph in the spring are <br /> the cause of frequent dust storms . Prevailing winds are northwest . <br /> EXHIBIT L - RECLAMATION COST <br /> HIGHWALL REDUCTION <br /> As shown on EXHIBIT C - MINE PLAN MAP, highwalls exist at the three <br /> pit areas--NO. 1 , 2 5 3 . The highwall height measured at several <br /> locations is also shown on EXHIBIT C . Total length of highwall is <br /> as follows : <br /> Average height Length <br /> 30 ' 670 ' <br /> 20 ' 500 ' <br /> 10 ' 400 ' <br /> 670 linear ft . @ 30 ' avg. height <br /> 500 linear ft . @ 20 ' avg. height <br /> 400 linear ft . @ 10 ' avg. height <br /> This is equivalent to 1 , 570 linear feet @ 22 ' avg. height . <br /> To reduce one linear foot of 22 ft. high vertical highwall requires <br /> the movement of 6 .72 cu. yds . of material from the top of the <br /> highwall to the toe of the slope. Horizontal distance for this <br /> movement would be 33 ft. Total volume required to be moved would <br /> be 6 . 72 X 1, 570 or 10, 553 cu. yds . This would be accomplished by <br /> drilling and blasting, where the materials is consolidated, <br /> followed by dozing. The cost per yard is estimated at $2 . 00/yd. <br /> for a total cost of $21 , 106 <br /> FINAL GRADING <br /> A total of 24 . 5 acres has been rough graded and backfilled. Pit <br /> areas and stockpile areas total 6 . 5 acres . Thus a total of <br /> 31 acres would require final grading. This work could readily be <br /> completed within 40 hours using a D8N dozer. Estimated maximum <br /> cost would be $6 , 000 . <br />