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<br />Mansfield Development <br />August 7, 1989 <br />Faae -4- <br />topo;ranhic mans, and it is quite possible <br />end,'or more rocks exist on the Cave of the <br />could be determined, however, by a sucvey <br />zlong the west permit boundary. <br /> <br />that some s_'_one damage <br />winds property. This <br />~f the pr~perrty corner <br />Th0 phase 3 amendment area, proposed by the Snyder quarry opera- <br />tion, is located in the northwest portion of t)ie permit. boundary. <br />To the west of this Phase 3 amendment area is .*_he willi.ams Canvcn <br />drainage and land owned by Castle Concrete. The ~otential for <br />spillage from the Phase 3 area onto Cave of the winds t~roperty is <br />essentially negligible. Visual impacts of spillage into Williams <br />Canyon would be detrimental to the Cave of the Winds, F.owever. <br />Rockfall and/or spillage onto Cave cE the t9inds property Erom the <br />Snyder Quarry operation would have to come from the southern part <br />iPhases 1 and 2 areas). The above referenced report by mark <br />~leifner (Reference 4) includes a preventative action plan to <br />reduce the probability of spillage occurring; however, in the <br />main amendment application for the Snyder Amendment area (dated <br />March 3, 1989, Reference 1), Mark Heffner concludes that "It must <br />be recognized that totally avoiding any rocks from going into <br />Williams Canyon would be virtually impossible. But controlling <br />the spillage to a very low and unnoticeable amount is not very <br />difficult. Producing long and highly visible scree slopes will <br />not be done and any spillage which does occuc will be s~ minor as <br />to not be visible except to the highly trained eye." <br />Blasting Effects: <br />Concerns over the effects of blasting vibrations were expressed <br />by Mansfield Development. No discussion of blasting ~:ffects on <br />adjacent lands or nearby facilities were r_ontained in .he infor- <br />mation reviewed. Based on the information available at this <br />time, it is not known what the effects of blasting will be on the <br />Cave of the winds. If the Division of Mines has not already <br />studied the issue, it should be contacted. <br />If, after reviewing this report, you <br />additional information, please feel <br />signed. <br />have questions or desire <br />free to contact Cho under- <br />Respectfully submitted, <br />GEOTECHNIGCAL CONSULTANTS, INC. <br />sl•: oh W~ mel i Jr. <br />Prof ss'ona~ G ologi t <br />.JWH/heh <br />GCI Job No. 3539 <br />