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' ~(,(/~~~/~` Cripple Creek & Victor Gold Mining Company ll 1\ A Joint Venture -Pikes Paak Mining Company, Manager ~a~/ ~~-~.// Operations Oflice Englewood Office PO. Box 191, 2755 Stale Highway 67 5251 DTC Parkway, Suite 700, Englewood Victor, Colorado 80860 Colorado 80111 (719) 689-2977 • FAX (719) 689-3254 (303) 889-0700 • FAX (303) 889-0707 February 12, 1996 SENT BY CERTIFIED RETURN RECEIPT REQUESTED AND FACSIMILE Mr. Berhan Keffelew Environmental Protection Specialist Colorado Department of Natural Resources Division of Mines and Geology Office of Mined Land Reclamation 1313 Sherman Street, Room 215 Denver, Colorado 80203 Reference: Cresson Project: Permit M-80-244: Procedures and Materials For 1996 Construction. Provision of Liner Load Testing and Interface Shear Results for 100 mil Textured LLDPE and Liner Load Testing Results for 100 mil Smooth LLDPE on Specially-Prepared Soil Liner Fill. Dear Mr. Keffelew: The Cripple Creek & Victor Gold Mining Company ("CC&V") submits, as attachments to this letter, two reports which provide the additional test results for synthetic liner material. These are the additional tests that have been discussed with you in late January as completing the information needed for Office of Mined Land evaluation. The only test data still required for the synthetic liner is, I believe, for the cold weather seaming of LLDPE. That information should be developed this week. Until those cold-weather seaming data are submitted and accepted by your Office, it is understood that seaming of LLDPE under lower temperatures is not permitted. The first attachment reports on the liner load and interface shear testing of 100 mil textured LLDPE. These data could not be generated until now because sufficient liner material was not available. The liner was tested with Low Volume Solution Collection System ("LVSCS") Fill and Soil Liner Fill ("SLF"). This is the liner sequence at the base of the Pregnant Ore Liner System. Both granular materials met the specifications presented in our letter of January 9, 1996. The liner load test demonstrated the appropriateness of this weight material under full loading conditions, as have all tests submitted for 1996 construction. The interface shear testing, performed with the same granular matrix, LVSCS Fill and SLF, also demonstrated that the configuration meet the design requirements. The peak friction angle was 19° with a cohesion of 990 psf. The residual friction angle was 18° with a cohesion of 865 psf.