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The following Items accompany this submittal: <br />• Figures: <br />• Exh. 7-20A, Figure 1-A3, Section 28 Pond Design Drawing, page Exh. 7-20A-4 <br />• Exh. 7-20A, Figure 1-A4, Section 28 Pond, Drainage Areas, page Exh. 7-20A-5 <br />• Exh. 7-20A, Figure 1-A5, Section 28 Pond, Subwatersheds, page Exh. 7-20A-6 <br />SEDCAD Model output results: <br />• SEDCAD model for PMT surface, 10 Year -24 Hour storm, pages Exh.7-20A-7 <br />• SEDCAD model for PMT surface, 100 Year -24 Hour storm, pages Exh.7-20A-29 <br />ENGINEERING CERTIFICATION <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of <br />Environmental Solutions, Inc., P. O. Box 2996, Cheyenne Wyoming. The information contained <br />in this document was provided by Colowyo Coal Company. Being familiar with the Colowyo <br />operation and the coal permitting process in Colorado, the information contained herein is <br />reasonable and correct to the best of my experience. <br />32257 <br />Exh. 7-20A-2 Revision Date: 02/15/15 <br />Revision No.: TR -105 <br />