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cannot be made to drain to any sediment pond. The traveling SAE area will drain <br />either into the advancing pit or be routed to a "traveling" total containment <br />impoundment, which will move as the pits are advanced. Each of the designed <br />impoundments will be installed prior to the advancing topsoil removal campaign <br />requires them and will be successively "reclaimed" be the advancing pit. See <br />section 2.05.3(3)7 of the permit for further details, (4.05.2(3)(b)(i)). <br />B. Diversions and Conveyance of Overland Flow <br />Western Fuels-Colorado uses various types of structures to control runoff from <br />disturbed areas within the permit boundaries at the New Horizon Mine. In <br />addition, surface mining activities are planned and conducted to minimize <br />disturbance of the prevailing hydrologic balance in both the mine plan and adjacent <br />areas in order to prevent 'long-term adverse changes in the hydrologic balance. <br />Sediment and runoff control methods include diverting runoff through disturbed <br />areas using stabilized earth channels, culverts or pipes so as to prevent, to the <br />extent possible, additional contributions of sediment to stream flow or to runoff <br />outside the permit area. WFC also uses straw dikes, silt fences, small V-ditches, <br />riprap, mulches, check dams, vegetative sediment filters, temporary cover crops <br />and sediment traps that will reduce overland flow velocity, reduce runoff volume, <br />or trap sediment. The complete sediment and water control plan is presented in <br />Section 2.05.3(3) Mine Facilities of the permit application package. <br />With the Midterm Permit Review of November, 2005, WFC was requested to <br />update the permit application with the design information for all surface water <br />control structures and provide one map which depicts all culverts, ponds, and ditch <br />locations on site. In 2006 prepared Technical Revision No. 54 (TR-54) to include a <br />complete inventory of all surface water control structures and a complete new list <br />of culverts, collection ditches and diversions for the permit area. TR-54 was <br />approved in July 2007 and included new Map 2.05.3(3)-1, Surface Water <br />Hydrology (Surface Water Features and Controls). <br />The updated information with TR-54 incorporates the latest topography for the site <br />and essentially all designs east of 2700 Road show the post-mining topography <br />design, while the area west of 2700 Road uses the worst case drainage scenarios so <br />that the structures are conservatively designed. Collection ditches, culverts, and <br />diversion design parameters are described in Section 2.05.3(3) Mine Facilities <br />pages 2.05.3(3)-8 through 10 and detailed design information is given in <br />Attachment 2.05.3(3)-1 Collection/Diversion Ditches and Culverts Design <br />Parameters. As of the Midterm Review inventory of 2006 completed for TR-54, <br />there are no surface water control structures of any kind at the New Horizon #1 <br />site. <br />C. Sedimentation Ponds <br />24