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<br />P!! =nterprises, irc. <br />PC Bor. 37° <br />~ivlde. ~olcra~o 20°14 <br />A~;n: t.^.r Greg Lapp <br />Re: Resu:`.s a'Labc:a:ory Tes.i^v <br />f>nael3~: Pit <br />Divide, Colorado <br />Tarrac~n Project No. 23981 C!2 <br />eW~n:~W ~4rs: cis. <br />~ ~~~~~~~ <br />CONSULTANTS WESTERN. iNC. <br />74.7 J:vwi6r, FivEL, SU c iQ3 <br />Co!o'°dc 57nnr:. Cblmtl: 9^915 <br />R+e~,a~-2iac r~Rt97sr-2f t: <br />Ten-acan F,as completed the requested laboatory testing for the materials provided from the <br />Mueller ?it in Dir~de, Sclcrado. The testing requested consisted of L. A abrasion and percent <br />fractured faces. Thw testing was used tc supplement previous testing conducted on these <br />materials in i9g1 CE.L.I. Proje : No.:,~9-5-91 dated August 26, 193"j. The purpose of the <br />requested tzsting was to pra:~de infornation regarding u:nformance to Colorado Department of <br />Transportation Spec'r,"i„ationsfoc aggregates far bases. <br />The results of the L. %~. abrasion and percent traduced faces testing are presented below <br />L A. Abrasion SZ% <br />Percent Fractured Faces <br />Single Face g5°5 <br />Double Face 87°~ <br />The resu~~s cf our previo:r testing are a"Sached. <br />eased on the State Depal~ment of Hibi'waps, Division of Highways, State of Colorado, <br />Standard 3pecincations .cr Rcao and 8r7o'ge Cons;rucG~or,, dwtea. 1391, Section 703.03, <br />Aggregate for Bases, the matehals submit ed generally meet the grading -eauiremen:s far <br />Classes i, Z, 3, and 5. In addaion, the materials do not vary significantly from the grding <br />reyuiremenls for Classes u and 7. The materials also meet t`te plastiay reeuirments fa; all <br />classes of aggregates for bases. There is no requi2meni for percent fractured faces. <br />The materials tested generatly de not meet the L. A.:,brasion reauiramerY of 50 percent <br />maximum. However, the materials tested were granitic, and the abrasion results may represent <br />more weathered portions of the materials in the borrow pit. VJC understand that these materials <br />have successfully bean used for base materials in the past. <br /> <br />ORiee~. ,A RwTma ~ Con~an,we, Inc. Cee4¢hnle¢L Ernnwnmtrtm: ¢nd ^¢teMly EngincaD <br />Arixenu ^ An01Y:a: ^ LcleraM ^ Itleh¢ ^ Oliric ^ k~a ^ i:a~x ^ uvosnl, <br />Mi^SO.lri ^ MOm^>a ^ NeGasW ^ Ne~am ^ Otlehoma ^ Tenrb6]be ^ lrxaa ^ Umh a W~,u,n ^ Wpmmq <br />lril6LT7Y ElinwEEaiFIr. SRI 'I OG6 <br />