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. ~ <br />//~, Kennecott <br />~ . Energy Memorandum <br />i Cofoavyo coal Company L.?. ~~; <br />FOR: Jim Kiger <br />West Pit Fill Inspection Certification <br />July 14, 2000 <br />On June 28, 2000, I inspected the area in which the West Pit Excess Spoil Fill <br />is being constructed. The purpose of this inspection was to observe the <br />surface rock drain that borders the 3:1 Excess Fill Slope; inspect the areas <br />dumped to final grade below the 7900 dump elevation; inspect the topsoil <br />replacement taking place above the 7250 elevation on the north side of the <br />fill; inspect the re-vegetation on the fill surface and to inspect the fill <br />for areas of water seepage or surface drainage, inspect the final grade slopes <br />below the 7300 elevation of the Excess Fill Slope, and to satisfy the <br />requirements of CDMG Rule 4.09.1(lla). <br />During the inspection it was observed that the condition of the fill was <br />good, no seeps or springs were noted. The collection ditches at the 6950, <br />7050 and 7150 elevations all were in relatively good shape. The ditch at the <br />7250 elevation is currently being used as a haulage road for scrapers laying <br />topsoil down above the ditch. At the toe of the Eill no water was running <br />from underneath the fill, 1/10th gallons per minute from under the west side <br />of the toe drain, 1/2 gallons per minute of water was running from the lateral <br />rock drain placed during the summer to drain the pond slide area and no runoff <br />was observed in the surface drain. <br />I am a mining engineer, registered in the State of Colorado, and <br />experienced in the construction of rock and earthen projects for the purposes <br />of mining activities. <br />To the best of my knowledge, based on my professional expertise the West <br />Pit Excess Spoil Fill has thus far been constructed in conformance with the <br />prudent state-of-the-art methodology for earth and rock fill construction, as <br />specified in pages Ia-2 through Ia-9, Exhibit 19Ib, and other applicable <br />requirements of the approved permit documents, a portion of CDMG Permit C-81- <br />019. <br /> <br />