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Response to DRMS Adequacy Review (2 drainage) — Cotter SM -18 Mine Reclamation Plan Amendment <br />Cotter Corporation (N.S.L.) ( "Cotter ") submits this response to the May 24, 2013, letter from <br />Travis Marshall, Division of Reclamation, Mining and Safety ( "DRMS ") to Glen Williams, <br />Cotter. The DRMS's comments are in italics and Cotter's responses are in bold. <br />1. Page ESWMP -S, section 7.2. The response to this comment is adequate. <br />No response required. <br />2. Page ESWMP-S, section 7.3. The narrative response to this comment is adequate. <br />(Note: The "Table 802C" has a hand drawn arrow pointing to "Grassed" Manning's n <br />values. Grass lined channels as determined by Ven Te Chow do not exist naturally in and <br />regions (i. e., without irrigation). Below is an image of a typical grass -lined channel. None of <br />the photos in Attachment 6 indicate a grass -lined channel exists on site). <br />No response required. The grass -lined channel was pointed out to illustrate that the n <br />value for such a grass channel (which we agree does not exist on this site) should be <br />lower than the values selected for the channels which do exist, or are proposed to be <br />constructed, in the somewhat rocky native material. <br />3. Curve number data. The narrative response to this comment is adequate. <br />No response required. <br />