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04/28/00 08:98 '$90J 289 1948 LG E~'EAIST f~004 <br />. • • <br />STATE OF COLORADO <br />DIVISIbh OF MINERALS AND GEOLOGY <br />Depamnenr a(NaNrel Remuroa~ <br />1313 Sherman St., Reom 2r5 D l v l 51 O N c <br />OenNer, Coloratlc 80203 <br />Phone: 53037 86b3567 M I N E RA I. <br />FAk; (3037 832-8106 &,-~- <br />GEOLOG <br />REGLAM ATIO <br />DaT13: Apri126, 2000 MINING•SAFET <br />TO: Erica Crosby co•°,~`^' <br />Greg E. walatar <br />FROM. Allen Sorenson e.~ut;•eo~n:era <br />Mleaie~ B. Long <br />D~•Inon Dtrvmer <br />R>L: 5lurry Wall and Interior Dike, L.G. Everlst, Inc., <br />Ft. Lupton Band and Gtaoe] Aline, File No. M•99-120 <br />This tLrrema provides the results of my renew of the Applicant's adequacy response dated Apr1121, <br />2000. the issues addrCSSed is the adequacy response were discussed ]n a meeting between the Division <br />and the Applicant held on April 20, 2000. ' <br />~ The Applicant must provide borehole data as described on page 4 of my memo dated Mazch 22, 2000. `~~ <br />` Ai the Apri120, 2000 meeting it was discussed that the type of subsurface information required would <br />be provided as the result of as upcoming drilling program to facilitate the design of the sluLty wall, <br />This information can be provided to the Division confidentially under Rule 1.3 of the Construction <br />Material Rules. <br />The statement in the Apri121, 2000 adequacy reb7iot7se t1Lae the Applicant will "adhere to industry <br />standards for compaction as they relate to grain size distribution end pettne2bilit'y" docs'not provide any <br />utility for the Divi"sion's regulation of design and construction. However, as detailed in the March 22, <br />2000 memo, the Division's primary interest irl the design of the imerior dike is rile placement of the two <br />types of fill proposed and the caatrol of tnaisture contest and eo7apactioa. The Applicant has <br />adequately addressed these concerns, and further information or specifications as the grain size <br />distn'bution or permeability is not required for approval. <br />e:~a~indawelprnonODF1, lApmn Ph 2,doo <br />