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X O ~ v ~ D o a ~) For: J. A. Rigor April 5, 1993 SECTION 16 FILL CONSTRIICTION OPDATE AND CERTIFICATION The purpose of this memo is to provide you with a construction update of the Section 16 Fill and provide an additional quarterly inspection certification for the first quarter of 1993. This certification will serve to supplement the quarterly certification I provided to you previously on January 22, 1993 as part of the "Section 16 Fill Construction Report". Construction Summary To avoid surface water from accumulating, a minimal amount of sloping was undertaken during February under the supervision of Mr. Ed Moyer. The sloping that was completed included extending the slope between approximately the 7775 and 7825 elevation northward to the dragline access ramp, in conjunction with the dragline operation. Additional fill will cover the dragline access ramp to the north fill limit when the area is mined out and the dragline cuts are extended south, beyond and west of the fill limit. When this occurs the benches above the 7825 elevation will also be sloped. No significant additional construction on the fill is contemplated until weather and ground conditions permit. I have visited the fill on a number of occasions to check and document its progress and to make field modifications as needed. Certification I am a mining engineer, registered in the State of Colorado, and experienced in the construction of earth and rock fill embankments. Mr. Moyer is a geological engineer who is experienced in the construction of earth and rock fill embankments. The supervision and observation of the construction work was to insure proper construction of the fill and to satisfy the requirements of CDMG Rule 4.09.1(11). This fill exhibited no appearances of instability, structural weakness, or other hazardous conditions at any point during this time period.