Laserfiche WebLink
JAN-31-96 WED 08:55 CYPR' CLIMAX METALS FAX N0, 719A"^'1251 P. 03 <br /> ,,rL)N-30-19% 09-34 'I TAN EW IR(>P1PFrL 303 8589910 P.82 <br /> taI <br /> %%ed'Soa <br /> Rotondo 80112 <br /> Phone_(303)SW-9852 <br /> January 30, 1996 Fax: 003)850-Mo <br /> Mr_Stuart Teuscher <br /> Climax Mine S 10 I-004 <br /> lugbway 91 <br /> Climax,Colorado 80429 <br /> Recommended Modifications <br /> Robimen Lake Cat-off Wall <br /> Dear Stuart- <br /> s letter provides a recommended modification to the co,ncr to cut-off wau designed for <br /> e Robinson Lake Pump Back System The original eut-0 wall design called for a 24. <br /> inch deep minimum cur-off wall key to be cxcaYated into bedrock as a means to <br /> iatercept any potential seepage within the bedrock. The ut-off wall would then be <br /> constructed as a single wail starting within the keyway. In the original design. no f <br /> provisions wen made to address conditionS where the key co Id not be trenched. <br /> Lt;during excavation of the ctrt-off wall key,the bedrock s precludes advancement <br /> of the keyway, a modification to the design is recommended ovide a <br /> Pr watertight seal <br /> against the bedrock. It is recommended that a 24-inch concr�te wall footing foundation <br /> be constructed ort the surface of the bedrock prior to fo 'ng the cut-off wall. The <br /> purpose of the footing is to provide a large surface area seal ate the bedrock face, thus <br /> minimizing any potential seepage between the cut-off wall an bedrock. The footing will <br /> be constructed in the following steps: <br /> The bedrock will be visually inspected to emurc a rock face is competent <br /> and free of�U u asuuss�ve tete orJ <br /> oints, a condition of the bedrock <br /> Prior to footing construction will be documented; <br /> The bedrock surface sitali be cleaned to be free of soil, loose rock, or other <br /> foreign materials or substancos to promote adhc ion of the footing to the <br /> bedrock surface; <br /> awoo eoc <br />