2008-03-31_REPORT - M1988112 - Laserfiche WebLink

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San Luis Project CDMG Annual Report March 23, 2008 Page 3 Table 1-San Luis Project Mine Land Disturbance (continued) Area Permitted Disturbance acres Actual Disturbance acres Completed Reclamation acres Remaining Reclamation acres Waste Rock B 18 18 18 0 Waste Rock C 30 28 28 0 Waste Rock D 42 42 42 0 South Waste Rock 50 35 35 0 Mill Area 26 26 26 0 ESI Leach Pad 10 10 10 0 Borrow Area 11 10 0 10 Roads 30 20 0 24.4* Tailing Facility 192 192 169.4 22.6 Tailing Collection Pond 5 5 0 5 Administration Office Complex 3 3 Transferred to MRCS 0 Total Area 547 509 422.7 86.2 * Roads include areas that were previously accounted for within other facility footprints, but since the majority of the facilities have been reclaimed only leaving the roadway surface footprint; this roadway acreage has been separated and accounted for as roadway disturbance. Previously, this roadway disturbance was included within the Waste Rock C, West Pit, and tailing facility disturbance identification. Therefore, the roadway disturbance acreage has been increased and the disturbance acreage of the facilities has been decreased. Lysimeters were inspected monthly and reported to the Division. The lysimeters remained dry throughout the year. Ground water sampling and analysis of the San Luis town and the Shalom Ranch wells were conducted in accordance with the applicable technical revision monitoring plan. Laboratory analytical reports were distributed to the Division and the other applicable parties upon receipt from the Laboratory. Tailing facility underdrain flows were monitored at the base of the embankment to determine the rate of underdrain return flow to the collection pond. The 2007 underdrain flow rates ranged from 33.37 to 48.11 with a mean annual underdrain flow rate of 42.27 gpm. As specified in the TR-31 and TR-32 monitoring plans, mor,~thly and quarterly pond analysis were conducted and reported to the Division.