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<br /> <br />Assessment of conditions for recommrnded wnswction specifications <br />~ was based on preliminary desigo information supplied to us by Western <br />.. Fuels-Coloradq otn general tmdersmnding of the project, and our <br />~~ experience with similar projects. <br />This report is not an investigation of embaal~ent foundation condi- <br />tions and assumes that the foundation conditions aze as portrayed to us <br />by Western Fuels. 71tis repoR does not deal with surface water issues <br />relating m operation of the 007 pond or culvert design through the <br />embankment <br />1.2 ACKNOWLEDGMENTS <br />Recommendations for constmction speciflcations for the roekfill <br />embank®ent were developed order the guidance of Michael W. West, <br />Ph.D., P.E. Proposed specifications were prepared by James D. GiU, <br />P.E. This report was prepared by Mr. Gill and was reviewed by Ih. <br />West. Project data were supplied by Mr. Tod Lefevre, Mine Engineer, <br />/ Western Fuels-Colorado (New Horiwn Mine). <br />t~~ <br />2. S1TE CONDITIONS AND PROPOSED CONSTRDCTION <br />The embankment traverses the 007 pond at the New Horizon Mine. We <br />assume the pond will be pumped down so that constmc[ion will take <br />place under dry conditions. Wes[em Fuels has indicated that water <br />could rise up on both sides of the embankment to an elevation 5650 feet <br />during a 25-year, 24 hour flood event. Primary and secondary culverts, <br />designed by Western Fuels will be consWCted in the embankment to <br />allow for passage of surface water through the embankment and to <br />reduce any differential hydrostatic head across the embankment. <br />Culvert design is beyond [he scope of this report. <br />The proposed roclcfill embankment will be approximately 950 feet long <br />with a fudshcd crest width of 35 feet. Total depth of fill will range <br />from 15 to 20 feet with 3h:ly side slopes. An unpaved road on the top <br />• <br />~' Attachment 2.05.3(3)9- 3 <br />Attachment 2.053(3)9- 3 <br />