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III iiillllllllll III <br />999 <br />AS BUILT CERTIFICATION <br />FACILITIES AREA POND <br />I, the undersigned, a licensed Professional Engineer in the State <br />of Colorado, make the following certification of the as built <br />Facilities Area Pond structure. The pond was constructed using an <br />existing pre-law pit and had inflow and outflow structures formed <br />to match the existing pit and meet design criteria. The pond was <br />constructed between May of 1994 and July of 1994 as schedules <br />permitted. I personally observed the construction process on a <br />daily basis and certify that the pond was built using current best <br />available technology. The pond meets or exceeds design criteria as <br />detailed in the Edna Mine Permit (C-80-001), and was built to those <br />specifications with the following exception. The half round <br />culvert specified on the inlet down drop structure was found to be <br />structurally inadequate. For this reason culvert, of the same <br />diameter was substituted. The culvert was checked, via Sedcad, to <br />insure that it would handle flows required in the hydrologic <br />design. I also certify that the pond currently has adequate <br />sediment storage capacity to meet that required in the permit <br />document. <br />David L. Beverlin <br />P.E. #24739 <br />