Laserfiche WebLink
RECEIVED <br />CLIMAX MOLYBDENUM COMPANY DEC 13 <br />HENDERSON MINE AND MILL 1~2 <br />Olrisioa a} Mlrtarals and 6ealrty~ <br />Permit Revision in Response to Financial Warranty Increase <br />Technical Revision #12 to Permit M-77-342 <br />RESPONSE TO DMG REVIEW OF TR-12 DATED OCTOBER 2, 2002 <br />The following response to DMG comments on TR-12 in a letter dated October 2, 2002 is <br />presented on a numerical basis parallel to DMG's numerical comments. <br />1. Reduction of Bnffer Area Disturbance: Henderson concurs. DMG will be contacted <br />at least 30 days prior to any anticipated disturbance of the 318 acre buffer area to facilitate <br />increases in the Financial Warranty (FW) amount. <br />2. Structural Demolition - On Site Disposal: The Henderson Mine and Mill is a <br />modem facility constructed entirely of concrete components, steel, and other metals. Unlike the <br />Climax Mine, timber and wood was not used for construction. Therefore, wood products consist <br />of such things as wooden doors, paneling in some azeas, non-recycled pallets, rail ties, etc. <br />Henderson polled its engineering and operations staff regarding the amount of wood products <br />that might remain at the time of a total closure. These personnel believe that significantly less <br />than 1 percent of all demolition materials would require off-site landfilling. Additionally, <br />practical experience from demolition of the crusher corroborates this amount. Given this <br />information, and lacking building by building inventories (that would change in time at any rate), <br />Hendetson believes Utat applying a cost for hauling and landfilling 1 percent of the total mine and <br />mill demolition volume is reasonable. <br />3. Disposal Locations: Attached is a detailed map showing the locatons of the two <br />proposed disposal locations at the mill site. Also attached are photographs of these two sites for <br />purposes of perspective. Note that both sites drain directly to the tailings impoundment. The <br />presently active small site in Area 18 is directly adjacent to the tailings impoundment, while the <br />larger site in Area 5 is north at the head of a direct drainage to the tailings impoundment. <br />Henderson concurs with DMG and will cover each disposal site with a minimum of three (3) feet <br />of cover material. The large Area 5 site will be wmmissioned upon a complete closure scenario <br />for the mill and wilt utilize the fill material directly adjacent and above the site. Presently, this <br />