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iR1NIDAD RAS1N MINING, INC. <br />SEDIMENT POtJD CERTIFICA7ION fiEFORT <br />5. Sediment Fond: ]5-P11 <br />A) Comments: <br />This pond was partially constructed prior to September, <br />1984: however, much additional work was required for <br />certification. It was necessary to er,pand the pond and <br />rewor6: the dam. <br />E) Design Rasis for Certification: <br />Technical revision 6y American Engineers, Inc. dated May <br />30, 1984. <br />C) Constructed Elevations: <br />The elevations listed below were checked with a precision <br />level and stadia rod: <br />Dewatering Pipe Inlet <br />Dewatering Pipe Outlet <br />lop of Dam <br />Eottom of Spillway <br />Toe of Dam <br />bottom of Pond <br />After the additional wort::, all elevations were found to be <br />within 0.25 feet of the design. <br />D) Fottom Width of Spillway <br />Design: 15.0 feet <br />Measured: 1~.5 feet. <br />E) Riprap Requirements: <br />Design: Placement in spillway channel and downstreart~ <br />side. <br />Measured: As designed. <br />F) Slope of Lam: <br />Design: 2.0 H 1.0 V ma>:. <br />Measured: 2.u H 1.0 V. <br />13 <br />