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CERTIFICATION OF CONSTRUCTION SEDIMENT POND 1, SEDIMENT POND 2, TRUCK DUMP POND AND WASH DOWN POND These ponds were designed and built as part of the coal loadout facilities near Carbondale in 1980 and 81. Design information is given in Appendix E of Volume 11, Appendices, of the Snowmass Coal Company Permit No. C-025-81. Sediment Pond 1 handles runoff from the rail loop, Sediment Pond 2 is a storage reservoir for water to be used for irrigation and dust control, the Truck Dump Pond handles runoff around the truck dump and the Wash Down Pond handles water from cleaning the conveyor tube. These ponds were primarily excavated below ground level. The freeboard for Ponds 1, 2 and the Wash Down were constructed above ground level and the entire embankment for the Truck Dump Pond were installed above ground level. Topsoil for these ponds was stockpiled along the tracks. The core material from the ponds is also stockpiled nearby. All but the Truck Dump Pond have rub- ber linings. Supervision of the construction of these ponds was done by Dravo, but no documentation or certification was available at the mine at the time of this certification. Spot inspections were done by Hank Artaz of Snowmass Coal Company who indicated that good construction practices were being used. Revegetation around these ponds was done in the fall of 1981. Information considered in the certification of these ponds was: Approved design by Dravo, consultation with Hank Artaz, Snowmass, and personal observations on February 6, 1984. To the best of my knowledge and understanding, these ponds were installed according to the approved design and meet the requirements of the Regulations of the Colorado Mined Land Reclamation Board for Coal Mines, 1980. 1,~ ,^ n.. Larry M. Reschke ~' ~'~,~E P . E . N o : 19 6 91 : ~d';•.iM" "cd~'~c LMR:mgc ~~ 991