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5731 State Highway 13 ♦ Meeker, Colorado 81641 ♦ 970- 824 -1200 <br />March 27, 2013 <br />Mr. Rob Zuber <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIvED <br />MAR 2 8 2018 <br />Division of Reclamation <br />Mining & Saf,,ty <br />RE: Colowyo Mine, Permit No. C- 1981 -019, TR -97 — Second Technical <br />Adequacy Letter Response <br />Dear Mr. Zuber, <br />Colowyo received your letter dated March 6, 2013 and has provided responses <br />to your comments. Colowyo has included the full text of the Division's letter <br />below for ease of review, and provided specific responses to the Division's <br />questions at the appropriate locations. Colowyo's original responses are <br />represented by the red italicized text, while the Division's text is bold black. <br />Colowyo's current comments are in plain text. <br />1. Please explain why all updates were made to Table 1. Table 1 (page Exh. 7 -14- <br />6) has been updated with TR -97, but it is unclear why some of these updates <br />were made. Some updates had nothing to do with the issues from SL -06 <br />(which is the primary reason for TR -97), including the update of information <br />for the West Pit Fill ditch and for the East Taylor Pond ditch. Other updates <br />are related to SL -06 issues, but it is still unclear exactly why the updates were <br />made; for example, the reaches were changed for Prospect Ditch. <br />Colowyo s Response: <br />There may be confusion relating to the version of Table I that was used as the <br />basis for TR -97, before the changes in TR -97 are implemented. The only <br />entries in Table I proposed to be changed via TR -97 are those relating to the <br />Taylor Ditch (addressed in Exh. 7, Item 14, Part L), and three ditches in the <br />Prospect Drainage, namely Prospect Ditch, North Tributary East Pit Ditch <br />and Final East Pit Ditch (all addressed in Exh. 7, Item 14, Part R). However, <br />because Table 1 deals with all of the South Taylor ditches, it is often changed <br />by any TR dealing with the hydrology of the South Taylor area. It is <br />therefore necessary to refer back to the most recent previously approved TR <br />that might have affected other ditches in Table 1. For example, the data <br />A mining property of Western Fuels- Colorado, A Limited Liability Company <br />