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Mr. Wayland <br />Page l 3 <br />October 27, 2015 <br />agreements for all permanent man-made structures within 200 feet of the affected area. In <br />lieu of signed structure agreements, the Operator provided an engineering analysis which <br />demonstrated that the proposed mine slopes are adequately stable and protective of nearby <br />infrastructure. The Operator is proposing to change to the mine plan to allow for maintaining <br />a 1 H:1 V mine slope. Therefore, the formerly approved engineering analysis is no longer <br />valid. The Operator shall complete the following steps in order to be in compliance with Rule <br />6.4.19: <br />a) Provide a new set of structure agreements to all owners of permanent man-made <br />structures within 200 feet of the affected area.* <br />b) If the Operator cannot obtain signed structure agreements for all of the structures, <br />then an updated engineering analysis may be submitted for Division review. <br />*Structure agreements shall be sent by a trackable method, i.e. certified mail. In addition, <br />the individual structure agreements shall be labeled with the certified mail number or <br />other tracking number. <br />6.4.5 Exhibit E — Reclamation Plan <br />10. The Reclamation Plan did not address proper bonding of the lifts. Once a lift is placed it <br />should be scarified to a depth of two inches to provide good bonding between lifts. <br />Scarification shall be accomplished by disking, raking with a grader, or an approved alternate <br />method. Please specify how the Operator will ensure the lifts are properly bonded. <br />11. The Applicant is proposing to install a compacted clay liner on Reservoir #2 and Reservoir <br />#4. Please submit a construction quality assurance plan for the installation of the clay liner. <br />12. Please commit to providing a final construction report and certification for the pit liner. <br />13. To properly regulate the liner installation, the Division must receive a commitment from the <br />Operator stating that the design specifications will not be modified without prior Division <br />approval. <br />14. Figure 6.4.5 -1 Typical Section shows that the uppermost portion of the clay liner is exposed. <br />The portions of the clay liner above the normal pool elevation (5,050 ft.) should be covered <br />with overburden or a protective shell. Please commit to covering all portions of the clay liner <br />which are situated above the normal pool elevation and make the necessary changes to Figure <br />6.4.5 — 1 Typical section or provide a technical justification for leaving a portion of the clay <br />liner uncovered. <br />15. The Applicant has stated that overburden will be mixed with the weathered claystone and <br />moisture conditioned. Please provide specifications for the liner fill mixture including: <br />a) Percent fines (should contain at least 20% fines on a dry weight basis). <br />