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13. The DRMS reviewed the erosion and sediment control plan initial submittal as Exhibit 7, <br />Item 23. Specific design detail was provided as Exhibit 7, Item 26 in the latest submittal <br />regarding the single sediment pond proposed. This question is now complete. Additional <br />detail regarding timing of disturbance and additional sediment control ditching may result <br />during the adequacy review. <br />20. This question is now complicated by the Western Alkaline Category of CFR 434 <br />regarding effluent limitations that would apply for topsoil storage areas at the mine. It is <br />not clear at this time how the Water Quality Control Division will classify these areas <br />when Colowyo applies for the new point source outfall at the single sediment pond. The <br />simplest way to handle this is for Colowyo to provide a generic SEDCAD model for <br />topsoil storage areas that demonstrates that the ring ditches will either contain all storm <br />runoff or treat the runoff to the settleable solids limitation. <br />21. As you note above, the question remains incomplete at this time. <br />22. Colowyo has provided modeling for post-mining drainages. However, the DRMS is not <br />in favor of constructing post-mining drainages along hillsides and slopes that are not part <br />of the natural drainage of the post-mining topography. Reconstructed drainages like Deer <br />Draw, Elk Draw, Bear Draw, Little Bear Draw, and Little Fox 1 are some of the proposed <br />channels that are not topographically controlled by the PMT. The long-term function and <br />stability of these drainages are in question. This question should be resolved prior to <br />review of any additional modeling. <br />23. As you note above, the question remains incomplete at this time. <br />If you have any questions, please let me know.