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<br />~ The pond has no primary or secondary (emergency) outlet. Upon filling, the incised pond <br />would overtop. However, the SEDCAD model requires an outlet to complete the run. <br />Therefore, a 12-inch diameter culvert was added (as shown in the output) so that the <br />model would run to completion without premature termination. All other design input <br />and output parameters are shown on the attached SEDCAD*'" 4 printouts. <br />CERTIFICATION <br />I, Richard Spotts, state that the information presented in the Intake Shaft Facility <br />Drainage And Sediment Control System Design Report for Twentymile Coal <br />Company was prepared by me or by persons under my supervision and is correct to <br />the best of my knowledge and information. <br />Water & Earth Technolo ies, lnc. <br />Richazd Spotts, P.E. <br />President <br />Principal Engineer/Hydrologist <br /> <br />