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<br /> <br />3 <br />~. <br />,,,. <br />~. <br />C, <br />~. <br />%: <br />f.- <br />r- <br />r~ <br />:f <br />argument is made that due to the slower rate of rise within the <br />impoundment, that a free draining material within the raise is not <br />required to provide for desiccation of the beach tailings. Also, the <br />point is made that the potential for free water to impound against the <br />embankment fill no longer exists in that the free water pond is remote <br />from the embankment. <br />BMRI has indicated that Raise 1 has been constructed in lifts of up to <br />4 feet in thickness. BMRI must demonstrate that the ~ecified density <br />and compaction is beincr achieved at the base of these ifts. Density <br />and compaction testing of emban]®ent materials should continue through <br />the entire thickness of each lift, and should focus on the base of the <br />lifts. <br />LINER COVER/DRAINAGE BLANKET <br />BMRI has agreed with the Division that the maximum allowable amount of <br />fines in the drainage blanket material will be 35 percent, and has <br />modified the contractor's borrow and placement procedures to allow <br />conformance testing of the drainage blanket materials prior to <br />placement. BMF2I has initiated a conformance testing program which <br />will consist of gradation analysis of one sample from each ~ acre of <br />drainage blanket that has been placed. One sample per # acre may be <br />The Division can approve the specification change for embankment fill, <br />through the technical revision process, only with the understanding <br />that an in-depth characterization of the Raise 2 lift foundation, more <br />rigorous than that accepted for Raise 1, will be required before Raise <br />