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~ e !/ ' <br />to ~'4 ' e <br />~, <br />- ROAD MATERIALS - SAND - RIP RAP - WALL ROCK <br />Mesa Sandstone, L.L.C. <br />P. O. Boi '>''>0 970-565-1167 W. Goode <br />Cortez, Colorado 970-749-0183 W. Goode <br />81321 <br />June 30., 2007 l~/-tp~ ~ '~a3~? 1 <br /> <br />/J~~ 2 4 20pI <br />Jj~lSj arb~,„r',e <br />~.p Min1a~ onu~Sa ~° . <br />ety <br />Colorado Division of Minerals & Geology <br />Durango Field Office <br />701 Camino del Rio, Room 125 <br />Durango, Colorado 81301 <br />.~ ~ - ~ <br />Attn: Wallace H. Erickson / ~ ` / <br />Hindmarsh Sandstone-Extraction Area expansion <br />112 Permit No. M2004 009 ~/ ~Su~~'~1~~~2 <br />Deaz Mr. Erickson: <br />RECEIVED <br />~JUL 2 7 2007 <br />Division ofa d Safety n, <br />Mining <br />The time has come to expand the drill-and-shoot extraction area of the North Quarry <br />area of the Hindmarsh Sandstone Quarry. The attached portion of the Exhibit CO-2 <br />Mining Plan Map shows the current extraction area of Shot #1 and a process area in <br />Shot # 11 outlined in yellow and currently under financial warranty. <br />The area we wish to expand into is outlined in orange. <br />For the warranty increase, we would suggest the following proportional increases for <br />the tasks of DRMS's cost analysis: <br />Task # 002 HiQhwall scaling <br />Highwall length will increase from approximately 1,238 lineal feet to 1,830 <br />lineal feet which is a 147.8% increase. <br />1,830 / 1,238 x 200 = $296 (increase of $ 96) <br />Task # 004 Sur ace ading & Topsoilin <br />Three acres originally has increased to 4.8 acres = 160% increase <br />4.815/3.0 x $6,445 = $10,344 (increase of $3,899) <br />Task # 005 Reveeetate <br />Four acres originally will increase to 5.815 acres = 145% increase <br />5.8] 5/4.0 x $4,997 = $7,264 (increase of $2,267) <br />TOTAL WARRANTY INCREASE <br />$6,262 <br />