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ORIGINAL -PUBLIC FILE <br />(Page 2) <br />MINE ID # OR PROSPECTING ID #: nn_I9an-red <br />INSPECTION DATE: d./n~/AS INSPECTOROS INITIALS: Ali <br />OBSERVATION <br />The Division met with CC&V staff regarding the draft report clarifying the <br />liner load test and water balance for the valley leach facility that was <br />provided on 3/31/05, while in the area inspecting NOIS. The report was <br />requested by the Division to be submitted as TR to clarify what was <br />approved under Amendment # 8, once the Amendment # 8 area construction was <br />completed and certified and the facility approved to accept and leach ore. <br />Under Amendment # 8 all the engineering calculations were based on average <br />ore bulk density of 110 pounds per cubic feet. However, in the narrative <br />portion of the application an average ore bulk density of 96 pcf was <br />utilized to discuss the valley leach faculty and water balance, at a <br />maximum height of 590 feet, for a total tonnage of 262 million tons by the <br />year 2012. However, the ore bulk density ranges from 90 pcf to 120 pcf. If <br />the ore is loaded to the Board approved height of 590 feet under Amendment <br /># 8, it will exceed the 262 million tons. Both the Division and CC&V were <br />aware of the discrepancy and the fact that liner had been tested to handle <br />loads in excess of S00 feet at 110 pcf of bulk Density. CC&V had agreed to <br />submit a TR to clarify the discrepancy in the language with a new Liner <br />Load and water balance calculations for the valley leach facility. Both <br />reports in their draft format appeared to be in accordance with what was <br />approved in Amendment # 8. The higher bulk density was utilized to <br />calculate both the liner load and water balance. Only a few clarifications <br />to some wording were requested to be changed. All the calculations were as <br />approved in Amendment # 8. The technical Revision will be submitted by the <br />end of this month. <br />I & E Contact Address <br />Harry Posey (e-mail) <br />NAME: MR TIM COMER cc: r CE <br />OPERATOR: CCBV overburden/ topsoilr BL <br />STREET: P_O_Rnx 191 r FS <br />r HW <br />CITY/STATE/ZIP: vicmR cni ~ea~t~ RnR~n P HMWMD (CH) <br />r SE <br />r W4CD (CH) <br />CC: r OTHER <br />