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]]-;~-g3 O1:_I~PiS FFON 5.:n i{. DENVER • ~0 <br />Sr[rrEN ROBERTSON AND KIRSTEN <br />Consultiny Enyinetas drd Scientsts <br />MEMORANDUM <br />TAO: ~ ~/Mike Young - BMRI <br />FRQA~](~( Dave Hallman - SRK <br />DATE:/ W Navembcr 19, 1993 <br />]tE: SAN LUIS FROJECT -RAISE CONSTRUCTION <br />Prior iv resuming construction of the Phase II embankment raise at the south abutment, the Issue <br />of the lino Cover material in this area nttads to be addressed. As you are well aware, there is <br />some out of specification Type 2 material located in acne 1 at the south abutment of the <br />embanltmertt rain. This materiel contains slightly devoted fines contenU with respect to the <br />Specifications, <br />Laboratory permeability testing of a sample of this material indicates a coefficient,. of <br />permeability which is 1.4 x 10"t cm/aec (see results of sample DH-1 in November 11 letter to <br />Ken Klulcadahl) and therefore the material is capable of functioning as intended. However, <br />airtoe thin area will be covered by the raise fill it will not be in contact with the tai&nga. <br />Therefore, It is not noceasary to replaced or arnend This oul of spotafu:ation malarial prior to <br />construction of the raise. <br />If you have any questions or comments regarding this issue, please fee~free to give me a call. <br />DH:Ip <br />Steffen Robertson antl KirSten (U 5.). 1r.C. <br />3232 SOUfi Vance Street, Lakewood, Golcratlo 80227, U.S.A. <br />Tei. (903) 985.1933 FaceiYnilb (3C3) 985.9947 <br />CJ[nAr offlCe9 In: U.S.A., Canetle, United KlnAdorn 2nd Alnca <br />