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For J. A. Kiger January 11, 1996 <br />WEST PIT HRCHSS SPOIL FZLL CONSTRDCTTON QPDATE AND CERTIFI TION <br />On December 30, 1995, i inspected the area in which the west Pit Excess <br />Spoil Fill is being constructed. The purpose of this inspection was to observe <br />the surface rock drain that borders the 3:1 Excess Fill Slope, inspect the <br />topsoil placement and contour furrows on the fill below the 7250 elevation, <br />inspect the placement of the benchmarks on the 6950, 7050 and 7150 elevations of <br />the fill, inspect the fill for areas of water seepage or surface drainage, <br />inspect the final grade slopes below the 7250 elevation of the Excess Fill Slope, <br />and to satisfy the requirements of CDMG Rule 4.09.1(lla). <br />During the inspection it was observed that the surface rock drain bordering <br />the Excess Spoil Fill 3:1 slope had been completed from the 7050 elevation <br />drainage to the 7150 elevation drainage, the Excess Spoil Fill had been final <br />sloped from the 7150 elevation to the 7250 elevation, except on the east and west <br />ends, and that construction of the two percent ditch that runs across the face <br />of the fill at the 7150 elevation was complete, and the fill was topsoiled, <br />contour furrowed and seeded from the 6850 elevation (toe elevation). At the toe <br />of the fill approximately 18 gallons per minute of water was running from <br />underneath the fill, 12 gallons per minute from under the fill and 6 gallons per <br />minute from the lateral rock drain placed during the summer to drain the pond <br />slide area. <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 of <br />mining activities. <br />-H',e`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-4, Exhibit 19Ib, and other applicable <br />requirements of the approved permit documents, a portion of CDMG Permit C-81-O1~. <br />- BE •,iiiiii <br />Qt~~HI~ /SrF~~''~ ~_ <br />~' h <br />~ _ Step en R. Hinkemeyer .~ <br />25436 ¢~rado Registered P.E. 25436 <br />