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CM0001511 <br />TA OF COLORADO <br />COLORADO GEOLOGICAL SURVEY COLORADO • <br />Department of Natural Resources <br />1313 Sherman Street, Room 715 <br />Denver, CO 80203 <br />Phone: (303) 866-2611 <br />Fax: (303) 866-2461 <br />June 6, 2008 <br />Mr. Bob Narracci <br />Planning Director <br />Eagle County Community Development <br />PO Box 0179 <br />500 Broadway <br />Eagle, Colorado 81631 <br />Bob.Narracci(ci)eaglecounty. us <br />Re: Climax, Robinson Lake Pump Station, 1041 Permit, CGS EA-08-00101 <br />Dear Bob: <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Bill Ritter <br />Governor <br />Hams D. Sherman <br />Executive Director <br />Vincent Matthews <br />Division Director and <br />State Geologist <br />Thank you for the submittal of the above referenced proposal. The proposal is for the construction of a pump station <br />and associated pipeline at the Climax Mine. Guided by Gary Slifka, Climax Molybdenum Company, I visited the <br />site on June 5, 2008. My inspection of the site was partially hampered by snow cover. <br />Geologic hazard mapping for the site indicates the site is underlain by colluvium, glacial deposits, and bedrock, • <br />which on gentle to moderately steep slopes is stable. Landslide deposits are found throughout the area and range <br />from smaller slumps in Quaternary deposits to larger, masses of bedrock that slid off glacial valley walls. <br />Geologic mapping shows east- to northeast-trending faults near the site. These faults usually show only minor <br />displacement with little deformation to the adjacent wall rocks and only minor accumulations of fault gouge. <br />The applicant's geotechnical investigation did not find any geologic hazards or soil constraints that would preclude <br />development. Although, the report includes recommendations for site grading and foundation design. The <br />recommendations outlined in the report are prudent and should be followed. <br />If construction occurs as proposed, and in accordance with engineering recommendations, the proposed pump <br />station and pipeline should not be significantly impacted by geologic hazards. However, given adjacent geologic <br />conditions, like faulting and landshding, if the plans change and construction will occur in areas with steeper slopes <br />or cut and fills slopes exceed engineering recommendations, additional slope stability analysis will be needed. <br />Please contact me if you have any questions or concerns. I can be reached at 303.866.2018 or by email at <br />karen.berr?Lcbstate.co. us. <br />Sincerely, <br />Karen A. Berry <br />Geological Engineer, PG, AICP, CPESC-SWQ <br />•