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I ? <br />already presented in Item #1 concerning saturation levels and proper construction techniques that also go to diminish <br />seismic liquefaction factors. <br />This proposed site was chosen because of its remote location. During a site visit to our property on October 27"', we <br />demonstrated to the DRMS the non-populated, non-developed, and limited hazard potential of this proposed project. <br />We feel that this proposed impoundment relates to a "Low Hazard Dam" situation as defined by State Engineer <br />Standards (Rule 2-CCR 402-14.2.14.3) - "'Low Hazard Dam' is a dam for which loss of human life is not expected, <br />and significant damage to structures and public facilities as defined for a `Significant Hazard' dam is not expected <br />from failure of the dam. " Asa Colorado Professional Engineer it is my job to take into consideration risk and threat <br />levels to life, property and the environment and incorporate that into a safe design - which I have carefully done. <br />This Technical Revision proposes a design that Venture Resources' strongly believes meets ALL of the regulations <br />set forth in the Hardrock Rules and the intent of related CO statutes concerning Tailings Impoundment stability. <br />Furthermore, Venture Resources also believes that this design completely satisfies the extra requirements the DRMS <br />has brought forth as additional design constraints and factor of safety targets. We provided these extra assurances in <br />our design in good faith that the DRMS is also in search of a rational engineering compromise. <br />A Compromise Condition: <br />Venture Resources would consider accepting a conditional approval that would allow us to buildout through Bench <br />#2 incorporating the geogrid and "French drains" as we have suggested. At this stage, the factors of safety are well <br />within the requirements of the September 8`i' Second Adequacy Review and conditions prescribed in the November <br />8d' meeting. Our permit work is also structured in this fashion to incrementally address the reclamation bond in two <br />stages. Risk is limited and there is a meaningful period of time to demonstrate consolidation and drying. Even in the <br />remote chance of failure, the Sedimentation Collection Pond would act as a secondary "trap" containing most, if not <br />all, of the tailings to our property. Approval conditions to allow us to proceed to the next benches, Bench #3 - #5, <br />would relate to the Important Impoundment Stability Measures brought forth in the revised Exhibit C and in Item <br />#1 above. <br />The application anniversary date is fast approaching, November 20, and we wish to have a definitive determination <br />so that we can prepare the second part of our response to the Second Adequacy Review. <br />Sincerely, p?%•••M g '••."E' <br />?P E Ma <br />. o <br />V <br />• <br />Venture Resources, Inc. y <br />; <br />? <br /> y. <br />42189 m <br /> <br /> OF <br />?0 <br />% •. ? <br />s <br />? <br />• <br />Ryan J. McHale, PE G\ <br />••••.....••' <br />? <br />F <br />SS <br />?N <br />Vice President /ONAt- <br />Attachments: Revised Exhibit C, Rev. 2, Nov. 10, 2010 with additional appendices <br />Synteen Technical Fabrics Geogrid Stability Analysis Package <br />Synteen Technical Fabrics Geogrid specifications <br />USGS Peak Ground Acceleration Map, 2% in 50 year return period <br />Revised Exhibit E 11, Rev. 3, Nov. 8, 2010 <br />cc: Clear Creek County Clerk and Recorder for applicant's Public View Copy <br />Page 5 of 5