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Colorado Division of Reclamation, Mining and Safety <br />March 21, 2016 <br />Page 3 <br />Attachment 2.05.3(3)-1 <br />Approved Attachment 2.05.3(3)-1 provides collection/diversion ditch and culvert design <br />parameters for the New Horizon Mine. Based on a review by the Division, a revised Attachment <br />2.05.3(3)-1 was not included which would contain the addition of the proposed collection ditch <br />below the Tailwater ditch. In addition, there is no discussion of the existing Tailwater Ditch in <br />Attachment 2.05.3(3)-1. Please revise Attachment 2.05.3(3)-1 to include all proposed ditches and <br />culverts throughout the mine site or provide revised text to discuss the omission of the designs in <br />Attachment 2.05.3(3)-1 and inclusion in another portion of the PAP. <br />Response: Attachment 2.05.3(3)-1 has been revised to include all proposed ditches and culverts <br />throughout the mine site and to reference other portions of the PAP which include designs for <br />ditches and culverts. <br />Also included with this adequacy response package is a change of index sheet to ease incorporation into <br />the permit document and materials revised in response to your adequacy comments. If you have any <br />questions regarding the enclosed adequacy review responses, please contact Tony Tennyson at (970) 824- <br />1232 or ttennysotla)tristategt.org. <br />Sincerely, <br />Daniel J. Casiraro <br />Senior Manager <br />Environmental Services <br />DJC:JS:dbr <br />Enclosures <br />CC: Frank Ferris (via email) <br />Chris Gilbreath (via email) <br />Jason Storey (via email) <br />Tony Tennyson (via email) <br />File: G474 -11.3(21)b-4 <br />!.K' EOiiftl_ Ae-J; Af Fr4;' LOYL f, <br />A Touchstone Ener&'Cooperative <br />