REV105512 - Laserfiche WebLink

Home Browse Search

Mr. James Dillie Adequacy Letter, Apache Mine Permit No. M78-009 Page 7 Item 7 You did not submit a new Exhibit E, Reclamation Plan, so, in effect, you do not intend to change any of the required reclamation. As approved, you plan to eliminate a couple of the existing holding ponds in Stage 2A area during mining operations and you, currently, do not plan to construct new ponds. How do you intend to contro% minimize or prevent downstream sedimentation problems before the planned vegetative cover becomes dense enough to prevent erosion in the drainage system? There is a corrugated culvert under the access road east of the central disturbed area which conveys water flow from the upstream holding pond to the main drainage system. Is the culvert under the access road sufficiently sized to carry all the ezpeMed flow? Flow wil! eventually increase because the upstream holding ponds wil! be removed A draft Reclamation Plan (Exhibit E) has been provided to the Division, as part of the response to a Permit Disturbance Variance in July 1999. Exhibit E has been further modified with respect to the reclamation seed mix. All these changes have been incorporated into the attached replacement pages for the permit amendment. Specifically, Page 11 of Exhibit E was changed as follows in response to Permit Disturbance Vaziance in July 1999. As outlined in the mining plan, backfilling and slope regrading will be part of the clay stockpiling process after the initial individual stockpiles of soil and overburden have been created. The total volume in the soil stockpiles will not exceed 38;AAA 26,000 cubic yards; overburden piles will not exceed 30,000 cubic yards. As backfilling and slope grading are completed, recoiling will take place using soils as they become available from the next mining area. This accomplishes cone-move method for replacing both soil and overburden. A total disturbed azea at any one time will not exceed 3A 85 acres. Of that 3A 85 acres, no more than 33 40 acres will need partial backfilling and recoiling; any disturbed acreage on the remaining 43 45 acres will have been backfilled and recoiled and in the final stages of reclamation. Of the 45 acres, 20 acres will have been seeded, leaving 25 acres for seed and fertilizer. Additionally, Page 16 of Exhibit E was changed as follows in response to Permit Disturbance Variance in July 1999. Reclamation Timetable. The reclamation phases are an ongoing part of the clay stockpiling process. As mentioned earlier there will always be less than 3A 85 acres of disturbed land. As mining is completed in Stage~3 the final.