Laserfiche WebLink
<br />Golder /Woelt7ta Ina <br />200 Union 8oulevord. Suite 500 <br />lakewrood. CO USA 80228 <br />Telephone (303)980-OSdO <br />Faz (303) 4854C80 <br />July 14, 1995 <br />Colorado Department of Transportation <br />Staff Geotechnical Section <br />4340 East Louisiana Avenue <br />Deaver, CO <br />• <br />aseoc~a~s <br />Reference No.: 953-2900.007 <br />RE: TAILINGS AND PAD N0.2 MIXTURE FOR HIGHWAY 67 STRUCTURAL <br />FILL <br />Dear Rick: <br />Presently, the Cripple Creek & Victor Gold Mining Comgany (CC&V) is placing a fill in <br />the area referred to as Arequa Gulch, as part of the Highway 67 realignment. As <br />discussed earlier with the Colorado Department of Transportation (CDOT), the Highway <br />fill is being constructed with crushed rock that has been processed for metals recovery <br />and well rinsed (referred to as Pad No. 2 material). The Construction Manager for this <br />construction project, Ford, Bacon & Davis (FB&D), requested that Golder Associates <br />Inc. (Golder) evaluate the potential use of a mixture of Cazltoa Tailings material and Pad <br />No. 2 material as Structural Fill for the Highway 67 Realignment Fill. <br />The volume of the Highway fill is estimated at approximately 750,000 cubic yazds. By <br />being able to introduce a fraction of the approximately 1,000,000 cubic yards of tailings <br />that needs to be relocated from the Pbase II Heap Leach Pad azea with the Pad No. 2 <br />material as part of the Highway Fill, less tailings material would have to be placed in <br />Upper Arequa Gulch, which has a finite storage capability. <br />Representative samples of Cazlioa Tailings material and Pad No. 2 material were <br />collected to obtain the consolidation characteristics fora 20 percent Carlton Tailings / 80 <br />per cent Pad No. 2 mixture. <br />Consolidation of a soil material generally occurs due to the following: <br />Deformation of the soil grains; <br />2. Compression of the air and pore water fluid in the voids; and <br />3. Squeezing out of the air aad pore water fluid from the voids. <br />OFFICES INAUSRLV.V1. CANALI4, GERMANY, HUNGARY.ITAIY. SWEDEN, UNITED IONGDOM. UNITED SPATES <br />