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iii iiiiiiiiiiiii iii , <br />FINANCIAL WARRANTY REQUIREMENT RE-EVALUATION <br />SAN LUIS PROJECT, M-88-112 <br />February 24, 2000 <br />TASKS AND COST ESTIMATES FOR REMAINING RECLAMATION OBLIGATIONS <br />(excludine West pit water management costs) <br />A) Waste rock disposal areas -Total $121,822 <br />A.l South waste rock disposal area - 15 acres of outslope grading @ $3,415/acre = $51,225 <br />- 15 acres of topsoil replacement @ $2,567/acre = $38,505 <br />- Reseeding costs - 50 acres @ $284/acre = $14,200 <br />- Total = $103,930 <br />A.2 Waste rock disposal area B -Reseeding costs @ $284/acre for l8 acres = 55, 112 <br />A.3 Waste rock disposal area C -Reseeding costs @ $284/acre for l5 acres = 54,260 <br />A.4 Waste rock disposal area D -Reseeding costs @$284/acre for 25 acres = $7,100 <br />A.5 East pit disposal area -Reseeding costs @$284/acre for 5 acres = $1,420 <br />B) Tailings Disposal Area - $413,827 <br />B.1 Backfill 23.1 acres @ 4 foot depth average - 149,072 cu-yds @ $.63/cu-yd = $114,297 <br />B.2 Grade backf-ill material - $5,937 <br />B.3 Re-establish east watershed through impoundment; includes grading low flow trickle <br />channel - 4,667 cu-yds for the channel and 15,000 cu-yds for re-establishing natural grade <br />@ $.26/cu-yd = $5,113 <br />B.4 Armor low flow trickle channel -Process 1,700 cu-yds on site @ $ ] 0/cu-yd = $17,000 <br />-Transport 1,700 cu-yds @ $1.53/cu-yd = $2,608 <br />- Place 1,700 cu-yds @ $4.82/cu-yd = $8,194 <br />-Total = $27,802 <br />B.5 Topsoil replacement - 59 acres @ $2,567/acre = $151,453 (includes grading topsoil) <br />B.6 Regrade diversion ditches - 9 acres @ $3,415/acre = $30,735 <br />B.7 Spillway construction- $15,575 <br />B.7.1 Excavation - 7 acres @ $540/acre = $3,780 <br />B.7.2 Concrete delivery & placement = $5,000 <br />B.7.3 Rip rap preparation = $4,000 <br />