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<br />i <br />1 <br />1 <br />i <br />1 <br />f <br />r <br />~" <br />~! <br /> <br />M00079GE <br />4/20/2000 <br />Page Three <br />base aggregate may be altered by adjusting the amount of the <br />overburden sandy clay soil materials to the mix during crushing. <br />It may be necessary to spoil much of the overburden sandy clay <br />soil materials to maintain an appropriate range for the Atterberg <br />Limits and sieve analysis of the product material. We are <br />available to discuss this with you. <br />It has been our experience in Delta County that many of the <br />aggregate quarries have difficulty maintaining adequate plasticity <br />to reduce ravelling of unpaved gravel road surfaces. If the <br />material is used for an unpaved gravel road surface it may be <br />necessary to adjust the amount of minus 200 sieve size material to <br />provide adequate plasticity for the desired use. We are available <br />to discuss this with you. <br />If you have any further questions concerning the geotechnical <br />engineering aspects of your project or if we may be of further <br />assistance please contact us. <br />Respectfully submitted, <br />LAMBERT AND ASSOCIATES <br />,+Tim~'r ~ ~~. <br />Orman W. ston, P.E. <br />NWJ/nr <br />Reviewed b <br />e s ~E.. <br />~Cambert ana ~~'~'ociatea <br />GONSUITING GEOTEOHNICAL ENGINEER! AMD <br />MATERIAL TESTING <br />