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2.05.3 <br />Sediment pond K collects run-off from the batch weigh loadout and surrounding <br />area. Pond K is a typical sediment pond, capable of containing the run-off from a <br />10-year event with a spillway system designed to handle the peak flow generated <br />by the 25-year storm event. However, pond K is a dugout pond so it does not have <br />a primary spillway. Dewatering will be by pumping as necessary. <br />Sediment pond F collects run-off from the new gob disposal area. Pond F is a <br />typical sediment pond, capable of containing the run-off from a 10-year event with <br />a spillway system designed to handle the peak flow generated by the 25-year storm <br />event. <br />li <br />(i) General Drainage Plan <br />(i)(A) Sediment ponds B, C, J K, and F and the general drainage plan for the main site, <br />loadout and new gob pile were prepared under the direction of J. E. Stover, <br />Colorado Professional Engineer, No. 19230. Sediment pond D and the general <br />drainage plan for the gob pile was prepared under the direction of Allan J. <br />Breitenbach, Colorado Professional Engineer, No. 15247. <br />(i)(B) A description of the ponds is presented above. Detai! drawings of ponds B, C, J, <br />K and F are presented on Map Nos. 22-B, 22-C, 22-J, 22-K and Volume IX Figure <br />3 respectively. A detailed drawing of the gob pile sediment pond is presented in <br />Volume 4, drawing 95266-04. <br />(i)(C) The preliminary hydrologic and geologic information required to assess the <br />hydrologic impact of the structure is presented in Volume III, Exhibit 8 for ponds B, <br />C, J & K, Volume IV, Appendices A and B for the refuse pile pond and Volume IX, <br />Appendix B, for Pond F. <br />(i)(D) No underground mining has occurred under any of the sediment ponds and none <br />is anticipated. <br />(i)(E) Not applicable. <br />(ii) Detailed Design Plans <br />(ii)(A) Sediment ponds B, C, J, K and F and the drainage plan for the main site, loadout <br />and new gob pile were prepared under the direction of J. E. Stover, Colorado <br />Professional Engineer, No. 19230. Sediment pond D and the drainage plan for the <br />gob pile was prepared under the direction of Allan J. Breitenbach, Colorado <br />Professional Engineer, No. 15247. <br />TR-30 <br />/j PPRauED <br />2.05 - 30 - 11 /03 <br />3/i3/o y <br />