Laserfiche WebLink
<br /> <br />Cc Cripple Creek & Victor Gold Mining Company <br />A Joinl Vemure -Pikes Peak M~nmg Company Manager <br />P.O. Box 197, 2755 State Highway 67, Victor, Colorado 80860 <br />~` ] (719)689-2977 <br />~/ FAX (719)689-3254 <br />April 29, 1994 <br /> <br />SENT BY FACSIMILE -CONFIRMATION COPY BY MAIL <br />RECE~vF~ <br />Mr. Berhan Keffelew <br />Environmental Protection Specialist <br />Colorado Department of Natural Resources <br />Division of Mines and Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />MAY 41994 <br />Division et Minerat~. ~ t'°01pJY <br />Reference: Cresson Project: Permit Number M-80-244: Commitment Number "42." <br />Dear Mr. Keffelew: <br />Pursuant to the approved application for Amendment Number 6 to the subject permit and CC&V <br />commitment number "~2" thereto, we are submitting the report of the testing and the results. <br />The commitment reads as follows: <br />~2. CC& V will complete additional shear test strength testing of the leach pad <br />interfaces in accordance with the recommendations of the OMLR and the third <br />parry reviewer. Subject to the results of the additional testing, CC&V will submit <br />design modifications and stability analyses as necessary. Development of the <br />leach facility may not proceed beyond the foundation preparation phase until the <br />leach pad configuration has been demonstrated to be stable, and has been <br />accepted by the OMLR. " <br />Cripple Creek & Victor Gold Mining Company ("CC&V") arranged for Golder Associates to <br />conduct "low stress" testing of the 80 mil VLDPE liner overlying wet soil liner material. That <br />testing was conducted and the results were sent from Golder to Allen Sorenson on April 13, <br />1994. I believe Allen has acknowledged them. We are sending, with this letter, a replicate of <br />the initial submission. <br />The tests were conducted at 15 and 30 psi, as agreed with the third party reviewer beforehand. <br />The lowest angle of internal friction derived from the tests was 28.8 degrees. The highest was <br />46.5 degrees. The variation is a function of the method of constructing the "best fit" line <br />through the data points. <br />