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My apologies for not being more clear when I repeated the original comment <br />in my July 2, 2012 letter. What I meant to say is that, in the Division's <br />opinion, Colowyo did not answer the question. Please describe how each of <br />the values in the sediment loading section of Table 6 is calculated, including the <br />sources of information. This should be done in a very direct manner, possibly <br />using an example. This issue has also been briefly discussed with Colowyo <br />staff (Kurt Blunt) at the mine's administration office. <br />Colowyo's Response: <br />Colowyo has included the previously approved version of Table 6 in this package <br />and is no longer seeking to modify it through this process. <br />GENERAL COMMENT <br />It is very important to consider what is happening on the ground. The <br />SEDCAD models are valuable information, but the Division is also concerned <br />about the stability of channels and the functioning of ponds. The <br />effectiveness of these structures will determine if Colowyo is in compliance <br />with the Division's permit and with your CDPS permit and will be important <br />in the context of future bond release applications. We encourage Colowyo to <br />consider these factors when proposing modeling updates, when constructing <br />structures, and when scheduling reclamation. <br />Colowvo's Response: <br />Colowyo believes that the Division's expectations of conditions under which these <br />structures, the approved designs, and the modeling inputs are reasonably <br />expected to physically, and by modeling assumption, maintain stability and <br />proper function, need to be clearly defined so that additional discussion and <br />evaluation of the applicable regulatory mandates can be applied in this case. <br />If you should have any additional questions or concerns please feel free to contact <br />me at your convenience at (970) 824 -1232. <br />Sincerel , <br />Tony Tenn son <br />Senior Engineer — Environmental <br />Cc: file CF 1.1.2.84 <br />A mining property of Western Fuels- Colorado, A Limited Liability Company <br />