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6-11-1999 11:34AM FROM ADCO/BAYER/CHEROKEE 303 452 4515 <br />• • <br />tlFrsaa <br />Howton <br />AMutchtirNs <br />Cleveland <br />~M <br />Fiirtfurd <br />Gwnrcrwur <br />las Angelus <br />Glifnroin <br />Manrh~yter <br />Nnr Hnnry.hirc <br />Nrrvark <br />N~v~JrrsrV <br />I~rtland <br />Maier <br />ttueheemr <br />Nrm Ynr4 <br />San Uielt. <br />Cnli/ornin <br />S+n Francixo <br />Calijnrnie <br />Washington <br />rhsfrirr of Cnlumbin <br />3 7uae 1999 <br />File No.: P132Z3-000 <br />Mr. Clexrc Htmegerr <br />[equip Aaaociatp, lac. <br />P.O, l~vxZlg2 <br />Serra Barhara, CA 9311(1 <br />IJNnaACAWLVD <br />II16Wte0aIVOk <br />E1i11~IMHJTAL <br />90[tr7lagi <br />P. 1 1 <br />Hairy 8c Aldrich, (nc. <br />11016th Sheee <br />Suiee 900 <br />Denver CO a070Z-SI01 <br />Tel: 30:153{.1100 <br />Ass: 3m.l3{.1TlJ <br />EuuO: DENOHnIryNdrtch.mr <br />Subject: P[Apoeal far Shury Wall Ueaign ind Conaauetion Service <br />104th Avemte Property - CAMA~ <br />Adatw County, Colorado <br />Rear Ome: <br />Haley ~ Aldrich. Inc. is pissed m ptsaetrt dt~ proposal w preside the cubjxr services. We <br />utrderamd drat yeu are whmittiag a proposal m CAMAS to design and coast[uct a slurry waU <br />at the suhject She. Haley ~ Aldrich proposes m provide the design arrd cotlwuetion QC <br />cervices is acootdattee wish the Snm Engineer's trquiremrno !or a sealed water atonge <br />rcxtvoir, Thex settvices will be provided wilt the primary objective of meeting dte State <br />Engineer's maximum xrpage allowaate of 0.03 CFlSF of wall per day. We are coafidertr <br />Char, barring dte oxisrerxr of hydrogaologic motnalita in the bedrock fartaatiwt, this criteria <br />wiU be achieved. <br />wa purpose m perform the folWworg taste: <br />1. . Ac reglrhed by qte 12FP, dri112g borittga to an average depth of 43 ft. The borings will <br />. be conducted io pairs and spaced at 1,000-ft iuornela along the alignment. Each <br />boring will be wrapkted e. a greed water monitoring weU. Rnct coring will ba <br />conducted in sdec0ed boring! m evaluax bedroclt coaditlmla. The parpMe of these <br />borings is m colixt ramples for sell-bentaniae backflll avx dralgn. determine the <br />suitability of the bedrock as a aompoaem of the becktill, determine the excaratabiRry of <br />the bedrock. and dotermim the key depth for rho slurry waU. <br />2. Perfornt soil-battoaite backGll miz dedgn labonmry testing. This testing will include <br />up m dtKe permeability less along with claui5catioa and index testing. <br />3. Prepare a roport summarizing the fxldm Itvyca'gsdoa and labmmry mix dt~ign <br />including a rocot~leodation concerning b~ appraprlare mix deeigrt m qse during <br />consaucdon and the recommended key depth for dte Blurry waU. Tbb report will be <br />provided within two wales fopowing dte cpmplotioa of laboratory tearing. <br />4. Layput the slurry well eligamenr on a sip plan provided by CAMAS and prepaee a <br />brief specifiation for Blurry wall canstnut+ea within vivo wanks following the . <br />. V;NYO Me14Y7n1ee Ut~1 V aOMr~ Lam <br />n..._.r«,..• <br />