1999-03-17_REVISION - M1981302 - Laserfiche WebLink

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Mr. Allen C. Sorensolp • March 17, 1999 Page 2 2. Construct a secondary lateral ditch to drain the seepage area described in item no. 7 above into the main pit interior drainage ditch. 3. Establish vegetation on the levee in accordance with the approved permit and with the performance standards of Rule 3,1,10 of the Construction Materials Rules and Regulations of the Mined Land Reclamation Board (Rules). Revegetation is not required for those portions of the levee plated with rock or riprap. 4. Upon completion of the foregoing three items, request reclamation responsibility release for the levee in accordance with Rule 4.13 or Rule 4.16." Since the April 13, 1998, inspection, Western Mobile has provided the Division with an as-built survey of the crest elevations of the completed perimeter levee; constructed a secondary lateral ditch to drain the seepage area as described in Item 2 above; and reseeded the levee in accordance with the approved Reclamation Permit. Following the most recent inspection, the Division concluded that "overall the levee is well maintained and in excellent condition." The most recent inspection(February 18, 1999) was occasioned by a written request from "Neighbors for a Livable Boulder" (NLB), who expressed concern about ground-water seepage through unmined portions of the Deepe Farm Pit perimeter and the subsequent development of wetlands in those areas. As I understand it, the NLB is concerned that this seepage will undermine their confidence in the stability of the Deepe Farm Pit levee/berm, and that the best course of action to evaluate the effect of the seepage on the stability of this structure is to conduct a piping analysis, which the Division has identified as the required "corrective action." While Western Mobile believes that they have met all of the Division's previous requirements regarding TR 006; nevertheless, the company has asked CTL/Thompson to carry out a piping analysis pursuant to the methods described in your February 22, 1999, Inspection Report. The results of this analysis should be available to the Division no later than the end of March 1999. In order to bring some degree of closure to responsibilities related to the Deepe Farm Pit perimeter levee, Western Mobile proposes to request partial reclamation release for the levee/berm from the Division. This release will cover all reclamation obligations related to the levee/berm on the part of Western Mobile except for Mr. Allen C. Sorenson March 17, 1999 Page 3