Laserfiche WebLink
<br />Jim Pendleton <br />Page 2 <br />One alternative we propose is to correlate the aerial survey with <br />North monitoring line only. This alternative has several advantages <br />such as allowing retreat raining immediately, allowing a longer post <br />mining monitoring period bei'ore next winter (since we will be <br />retreating sooner) and we feel there are enough monuments to obtain a <br />fully acceptable r_orrelation with the aerial survey. <br />The major disadvantage is less monuments to correlate to the aerial <br />survey. This is a disadvantage also in thzt fewer points allow for less <br />percentage error and it is more difficult to correlate the aerial survey. <br />Other alternatives may be possible but not evident at this time. We <br />would like to discuss this matter with you and arrive at a workable <br />solution to the problem. <br />Sincerely, <br />Dennis Conn <br />Director of Permitting <br />and Environmental Compliance <br />DC/U <br />ec: W.S. Wagener <br />J.L. Ellenberger <br />