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West Elk PR-07 Response to Adequacy Comments <br />page 3 <br />several of the other investigators but was not supplied in the submittal. Based <br />upon comments by the other investigators it is apparently relatively <br />"conservative", i.e. it identifies several areas as landslides with which other <br />investigators disagree. <br />"Landslide Map for West Elk Application" by John W. Rold - 2/95 <br />John Rold provided a draft map of landsliding at the West Elk mine site. Dr. Rold's <br />discussion refers largely to the earlier mapping by IntraSearch, Inc., as a base. John <br />recommends the addition of several "large landslides" not identified by IntraSearch, <br />Inc. and also disagrees with several landslides identified by IntraSearch, Inc. In the <br />vicinity of the SGFA. Dr. Rold closed his memo by recommending that the various <br />investigator's interpretive disagreements "should be resolved if any surface uses are <br />planned in this area for the future". <br />"Sylvester Gulch Landslide Analysis" by Tift & Clanton - 7/95 <br />Following Dr. Rold's report, Tift and Clanton performed a subsequent analysis for the <br />expressed purpose "to address the conflicting information that had been presented by <br />previous studies". Tift & Clanton appear to have performed more extensive field <br />reconnaissance than previous investigators, in an attempt to field verify interpretively <br />mapped landforms' geomorphology. Similar to John Rold, Tift & Clanton identified <br />several additional landslide landforms and disagreed with several previously identified <br />by other investigators. R. Tift closed his brief report with the following <br />recommendation: "Prior to finalizing plans for specific locations of surface facilities, <br />further site specific review should be conducted. In addition, soil testing should be <br />carried out at critical locations and, piezometers, inclinometers or other ground <br />evaluation techniques should be installed to monitor ground conditions over the life of <br />the facilities." <br />"Summary of Sylvester Gulch Geotechnical Investigations" by MCC - 2/97 <br />This tabular summary, labeled as prepared by the "West Elk Mine, references an <br />additional investigation performed by Golder Associates in July of 1996. No report is <br />provided. The tabular reference states; [Golder Associates] "Reviewed previous work <br />and concurred with Tift and Clanton assessment. Performed reconnaissance of site <br />and identified slide areas impacting proposed development." This tabular summary <br />also provides summaries of all the "Sampling and Testing Programs" performed <br />specifically in regard to the SGFA proposals. Finally the summary presents 22 <br />"Historic Strength Data" results for materials tested "For West Elk Mine" and 12 <br />