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iii iiiiiiiiiiiii iii • <br />FINANCIAL WARRANTY REQUIREMENT RE-EVALUATION <br />SAN LUIS PROJECT, M-88-112 <br />January 5, 2000 <br />TASKS AND COST ESTIMATES FOR REM.4I~i 7 iNG RECLAi~1.4T1ON OBLIGAT[ONS <br />~excludin~ West pit wa[er manasement costsl <br />A) Waste rock disposal areas -Total $121,822 <br />A.1 South waste rock disposal azea - 15 acres of outslope grading @ 53,415/acre = $51,225 <br />- 15 acres of topsoil replacement @ $2,Sti7/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 18 acres = $5,112 <br />A.3 Waste rock disposal azea C -Reseeding costs @ $284/acre for 15 acres = $4,260 <br />A.4 Waste rock disposal azea D -Reseeding costs @$284lacre for 25 acres = $7,100 <br />A.5 East pit disposal azea -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-}•d = $ 114,297 <br />B.2 Grade backfill 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-establist-ing natural grade <br />@ $.26/cu-yd = $5,113 <br />B.4 Armor low flow trickle channel -Process 1,700 cu-yds on site @ $10/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 = $E,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 conswction- $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 prepazation = $4,000 <br />