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V. COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />January 8, 2018 <br />Tony Tennyson <br />Colowyo Coal Company L.P. <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Re: Colowyo Coal NVline (Permit No. C-1981-019) <br />Technical Revision No. 116 (TR -116) <br />Adequacy Review <br />Dear Mr. Tennyson: <br />After reviewing TR -116 from Colowyo Coal Company L.P. (Colowyo), the Division has the following <br />comments: <br />1. The Agapito study submitted with TR -116 is dated October 19, 2017. The study is referred to in the <br />text as "AAI (2016)". Please confirm that the Division has the correct study, and update the permit <br />text to refer to AAI (2017) to avoid future confusion. <br />2. On proposed revised page 115, the final paragraph of text refers to Figures 2.05.6-1 and 2.05.6-2 <br />which are deleted with TR -116. Please revised the text to remove references to the deleted figures. <br />On proposed page 116, the fourth paragraph refers to a cross section in Exhibit 7, Item 22B which <br />does not exist within the Colowyo PAP. Please provide a copy to Exhibit 7, Item 22B or update the <br />reference to the correct exhibit. <br />4. The diagram presented in Figure 9 of Exhibit 7, Item 21 (the AAI study) appears to be erroneous and <br />misleading. Please provide a corrected diagram to Exhibit 7, Item 21 or included a reference to <br />Exhibit 7, Item 21 within the text. <br />5. At the request of Colowyo Coal Copmany, and in recognition of the potential conflicts between their <br />construction schedules and the permitting schedules of other State agencies, Stipulations 19 and 20 <br />are proposed to be modified, and stipulation 23 is proposed to be added. The proposed text of the <br />Stipulations is as follows: <br />Stipulation 19: OBTAIN DEWATERING WELL PERMITS AND SUBMIT A MINOR <br />REVISION. <br />DEWATERING WELL PERMITS MUST BE IN PLACE, AND A MINOR REVISION BE <br />SUBMITTED AND APPROVED BY THE DIVISION TO UPDATE SECTOIN 2.01.10 OF <br />VOLUME 1 OF THE PERMIT APPLICATION PACKAGE, BEFORE ANY PUMPING <br />WELLS ASSOCIATED WITH THE COLLOM PIT IS ALLOWED TO OCCUR. <br />flF'C-0 <br />H <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining. state. co. us I <br />John W. Hickenlooper, Governor I Robert W. Randall, Executive Director I Virginia Brannon, Director * r 1876 4 <br />