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LEtirre.r..npu~r~ <br />EtiGrAGeRitiC & <br />tiff Y[RbtiVtEV`rrtl, <br />SCJIt: CI6;d5 <br />i its ~: t't11 :`trcet <br />SuRtt 0'J{) <br />~l'9t'0Z. ~.1~ Ji}~.(J~-^~(~~ <br />Tci:.5ti~.~:..t, t t 00 <br />® i4iE1~1ORAtiD[]bt E.nuii:DFN"e+f-ialzr~Aldreh.eo,; <br />24 Januaro ?002 <br />TO: City of Greeley <br />Todd Williams <br />CC: Stale Engineer's Office <br />Dick Wolfe <br />FROM: Haley & Aldrich, Inc. <br />Jay C. Davenport <br />Steven C. Kuehr <br />SUBJECT: 90-dav Initial Liner Test <br />Post Slurry 4Va11 Construction <br />25'" Avenue Gravel Pit Storage <br />Greeley, Colorado <br /> Post construction testing of the water storage reservoir at the subject property will be <br />o~cES conducted in accordance with dte "Slate Engineer Guidelines for Lining Criteria for Gravel <br /> Pits," August 1999. Haley Sc Aldrich, Inc. (Haley & Aldrich) has prepared this memo to <br />[3oston <br />.L7<r~.=atrt~5t'r. describe [he standards to be met, a detailed conceptual level test procedure, the <br /> documentation requirements, and fie estimated costs assa:iated with past construction [esting. <br />ett~~~r,~,a <br />Llun <br /> Ttte 90-day Iiner test will determine if the slurry wall keyed into the bedrock will meet <br />Hurtter`i <br />wrra~, teat performance standards defined by the State Engineer when the reservoir is completely <br /> dewatered, thereby releasing the City of augmenta[ivn responsibilities for the gravel pit. <br />L"` `~"'`~~`~ <br />i; <br />: Additionally, this test will serve as evidence as part of a warran[y from the slurry wall <br />rer,un <br />~ <br />.r <br />contractor «~ the Ciry. The testing cansists of performin_ a 90-day Iiner lest to demanstra[e <br />tlanci'rs"` <br />~;rto t1<nupsL•:=;• the system compliance wide the Stale Engineer's standards. The demonsaation is achieved by <br /> carefully determining the water balance at the pit by measuring and moniroring the inflows <br />c:ra r[. <br />(precipitation, groundwateri and outtlaws (evapora[ion, discharee water}, Typically, die SEO <br /> requires the testing plan be appraved prior ro perf2}rming the test. This memorandum will be <br />S'~~rttand <br />, <br />submitted [a the SEO fur approval. <br />~ <br />uru;r <br />Rnch~•ax <br />ti.n.. .~~!'k <br />5.u: ~,,.,. , <br /> <br />. - Fr1n;i:~. ,, <br /> <br /> <br />