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KtE1NFEt UER <br /> A'I'7'AI:UMEN't' "B" <br /> 7"/0* <br /> - 42 <br /> _ GUU R. north of River Road _ 19 <br /> I — - --- - <br /> I SU IccI milliof Itivel Ito ad 01 17 <br /> We uodclstand lhal it is emimalcd Ilial 51), 5-axle Bucks lick day will havcl III rich direction as <br /> pall ul the agglegate pil ol/cufii011s 'like existing pavemcnl :y)pcals to be in nclatively good <br /> Condition with low Irl modeate sevelity hansverse cracks in the pavement section. Some edge <br /> cracks were ubscl ved in the norlllbound lane on either side of our second and Ihird borings. No <br /> «filing, shoving- alligalur-type cracks or outer significant distress was observed in the pavemcnl. <br /> 'there docs not appeal to be a signilicam anunml of truck lha(lic it,, This koad al live present lime. <br /> The Iraffkc index lit the cuklcol pavemrn is unknown lint is estimated to he app)oximalcly G.U. <br /> Based on 'Topic 0111 0(' the I •allruks I lighway I)esign Manual, o dailt Ina•k ha12ic count of 5() <br /> equates to a haflic index of 4) it lilt a 20-yet design lite. <br /> Willi an eslimoled I lal'lic Index of n,n lit the existing Irallic on I lanold Avenue, the measured <br /> pavemcnl section of appn/.ximalely '1;; inches of asphall ovek oalive soil corresponds to the lull- <br /> depth asphall section required lit a suhgkade It-Value of 51). In out opinion, the It-Value lest <br /> result of GI is nwrc rcplesenlative o1 llle silly sand soils in this area. Ill out opinion, a design R- <br /> Value of 511 should he used in pavcnlcnl seclion calculations ror this pnlicel. <br /> Based on a design traffic index of 9.0 and a design R-Value of 50. a f1111-depth section of 8.2 <br /> inches is required. Since the existing pavcnlent section consists of an average of 4.3 inches of <br /> asphall, an overly of 4 inches would be required to bring the existing section up to the design <br /> pavcnlent section. The fill-depth asphalt concrete pavement section was obtained from Table IV <br /> of "Flexible Pavement Slructur:d Section Design Guide for California Cities and Counties;' <br /> Third Edition. <br /> We also recommend placing a gcolexlile, such as I'elrontat or an equivalent gculexlile, over the <br /> existing asphalt concrete pavcnlcnl prior to placement of the new pavcnlcnl. 'fhc purpose of the <br /> gcolcxtilc will be to reduce the potential for moisture to pass into the existing cracks in the <br /> pavement. "fhc gculexlile should be installed per the nnanufaclurcr's specifications. <br /> All pavement malcrials should coniolo, Io the Callrans Slandand Spccilicit ill, s, latest edition. <br /> If you have any questions, please contact our office. <br /> Itcspcclfully submitted, <br /> QPptESSIOp,� <br /> RECEIVED <br /> �'• ,�o o�cwucvF�y� JUN 2 8 2002 <br /> Patrick C. Dell, G. F. C F y� <br /> Senior linginccl d No.y EIAs GEORGE R®, INC <br /> V ft0 d <br /> PCD:ss tt �fOrF.CH���' <br /> c�4tr OF Ca�"�C <br /> 17MlXI I SSI U2Il t Iv <br /> Cop)vipM 21x12 Klcinlrldck 6a <br /> Pope 2 of 2 <br /> June 24, 21412 <br />