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;~ <br /> ~~~ I~~I~~!~~II~~ ~~~ <br />ncE c. w~+iTE P.E. <br />1650 M. STREET PENROSE. COLORADO 81240 <br />CERTIFICATION <br />719-372-6461 <br />I, Lawrence G. White, a Registered Engineer in the state of Colorado, <br />Registration NO. 7964, do hereby certify that I have inspected the <br />Sedimentation Ponds at Twin Pines No. 2 Mine in accordance with Rule <br />No. 4.05.6 (13), "Sedimentation Ponds" - "Inspections", of the Rules <br />and Regulations for Coal Mining. Copies of the inspection reports for <br />Sedimentation Pond Nos. 1, 2, & 3 are attached. Comments and required <br />action is set forth on the reports, No conditions were found which <br />would affect the safety of the structures. The structures were inspected <br />June 17, 1991. The mine is preparing an emergency spillway design for <br />Pond No. 3 in accordance with MLRD directives. An emergency spillway <br />should not be required for Pond No. 2. The pond is totally excavated <br />in original ground, with considerable area for ponding on the mine site, <br />if runoff should exceed the capacity of the outlet structure. Pond <br />No. 1 does have an emergency spillway. <br />~~s~~U <br />awrence G. ite P.E. <br />Colorado Registration No. 7964 <br />July 10, 1991 <br />