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July 11, 2012
<br />JU% ?012
<br />Mr. Bob Oswald
<br />'r Colorado Division of Reclamation, Mining and
<br />1313 Sherman Street, Room 215
<br />Denver, Colorado 80203
<br />i tiLUR!,
<br />Re: Airport Pit, Permit M- 2011 -013, Technical Revision TR -1, Adequacy Review Letter"{j��pnl
<br />Dear Mr. Oswald,
<br />�C.o
<br />TELLURIDE
<br />STONE COMPANY
<br />Telluride Stone Company (TSC) is providing the following responses to your Adequacy Review
<br />Letter dated July 9, 2012. Post Office Box 3552
<br />Telluride, CO 81435
<br />Question 1: The revised mining plan states that the pit that is excavated will be backfilled with Tel: 970.728.6201
<br />unusable materials up to the original surface grades. We do not intend for this backfill material Fax: 970. 369.4568
<br />to include imported earthen materials from an offsite source at this time. TSC would like to reserve www.te[Lu6destone.com
<br />the right to allow for importing earthen materials per CRMS Rule 3.1.5 (9). If we do so, the imported
<br />material will be from a large pile of stored material owned by TRAA (landowner) immediately adjacent
<br />to TSC's mining permit eastern boundary. This large pile is comprised of a mix of topsoil, shale,
<br />sandstone and quartzite. It was removed from the east end of the owner's property by the owner (TRAA)
<br />and stored at this location. TSC currently has on site 40,373 cubic yards of stored topsoil and waste rock
<br />both in stockpiles and berms. Our initial mining area will be approximately 1 acre. The excavated topsoil,
<br />at an estimated average depth of 3.5 feet, will be 6,123 cubic yards. We are then estimating the brown
<br />stone average depth to be approximately 4 ft and the sandstone layer average depth to be 15 feet. The
<br />estimated volume in cubic yards of yield, respectively, would be 6,997 cy for the brown stone and 26,240 cy
<br />for the sandstone for a total of 33,237 cubic yards of stone. Our recovery, historically, has been 609 or 19,942
<br />cubic yards. This creates 400 of waste rock, or 13,294 cubic yards. The amount of total material displaced from the
<br />quarried area, topsoil plus stone, will be approximately 39,360 cubic yards. The waste material stored on site will
<br />be 19,417 cubic yards from the pit excavation. This material will be placed back into the pit with 19,943 cubic yards
<br />of existing stored material. The remaining stored material (20,430 cy) will be available and used for the 2nd acre as
<br />contemporaneous reclamation occurs. We will only likely need to import earthern materials when the 3`d acre is
<br />mined and contemporaneous reclamation has begun. TSC estimates that based on current market conditions the
<br />life of each 1 acre mined area to last approximately 3 years.
<br />Mining Area and Reclamation Volumetrics:
<br />Existing stored topsoil & waste rock, cu.yds
<br />40,373
<br />Initial area, acres (290 ft x 163ft)
<br />1.08
<br />Avg topsoil depth, ft
<br />3.5
<br />Topsoil volume cu. yds
<br />6,123
<br />Brown stone depth, ft
<br />4
<br />Brown stone volume, cu.yds
<br />6,997
<br />Sandstone depth, ft
<br />15
<br />Sandstone volume, cu.yds
<br />26,240
<br />Recovery (60% of 33,237 cy)
<br />19,942
<br />Waste rock (40% of 33,237 cy)
<br />13,294
<br />Material displaced in initial area, cu.yds
<br />39,360
<br />Material needed from existing storage, cu.yds
<br />19,943
<br />Material remaining from existing storage, cu.yds
<br />20,430
<br />Denver Retail & Wholesale Yard /Sales /Accounting Office • 3975 York Street Denver, CO 80205 • Tel: 303.388.8863
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