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CERTIFICATION <br />On January 12, 1993 I reviewed the as-built survey of the 001 Truck <br />Loop Sedimentation Pond (formerly known as 006 Tipple Pond "A") to <br />determine its compliance with CMLRD Rule 4.05.6(3)(d) requiring <br />that this pond be fitted with two separate spillways separated by <br />an elevation difference of at least one foot. <br />I am a registered Professional Engineer in the State of Colorado <br />and am experienced in the design and supervision of earthen <br />construction. I have reviewed the certified survey of this <br />structure performed by Peter Epp (Colorado P.L.S. No. 14815) on <br />December 22, 1992. I have also reviewed the previous as-built <br />certifications by Jerry E. Snider (Colorado P.E. No. 17570) dated <br />April 14, 1986 and myself dated February 6, 1991. In addition to <br />the above, I have discussed the modification made in 1992 with <br />Juan. P. Garcia who supervised the actual modification. This <br />modification to bring this structure in compliance with CMLRD Rule <br />4.05.6(3)(d) was to add a new 12" CMP spillway at an elevation 1.1" <br />above the existing standpipe structure. The existing standpipe <br />structure is the primary spillway and the new 12" CMP is now the <br />emergency spillway. <br />I hereby certify this modification as bringing this structure into <br />compliance with CMLRD Rule 4.05.6(3)(d). <br />_ J <br />Ro ert G. Trumbly, Jr. <br />Colorado P.E. No. 16957 <br />~~/ 3 -~~ <br />Date <br />