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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 />June 10, 2019 <br />Tonya Hammond <br />Snowcap Coal Company, Inc <br />P.O. Box 1430 <br />Palisade, CO 81526 <br />RE: Roadside Portals Mine, C-1981-041 <br />Bond Release Application No. 11 (SL -11) Adequacy Review <br />Dear Tonya, <br />The Colorado Division of Reclamation, Mining and Safety (the Division) received the <br />Roadside Mine's submittal of a bond release application, SL -11, on May 24, 2018. The <br />Division has completed reviewing the application and has the following comments: <br />1. On the bottom of page 6, it states that the "Perennial Herbaceous Production <br />Success Standard — Achieve 90% of the perennial herbaceous production of the <br />approved reference area." This statement is inconsistent with the standard in the <br />permit (page A14-11-1) which states "90% of the total herbaceous production of <br />the approved reference area." Please correct the standard in the application. <br />2. The reclamation standard as stated in the permit for production measures the total <br />herbaceous production. Snowcap is choosing to use perennial herbaceous <br />production instead of total production as the standard. Please clarify why <br />Snowcap is choosing to use this standard. <br />3. In the sample adequacy calculations on Tables 7, 8, 9 and I0, the t -values that <br />were used (1.68 for 40 samples and 1.7 for 30 samples) are for a two -tailed test. <br />Rule 4.15.11(2)(a) states that a one tail t-test is to be used in this calculation. <br />Please re -calculate the sample adequacies on these tables using the one tailed t- <br />test values of 1.3 for 40 samples and 1.31 for 30 samples. <br />This concludes the Division's adequacy review for the Roadside Mine's SL -1 Iapplication. If <br />you have any questions or concerns, please feel free to contact me. <br />''pF- COQ <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 httpl//mining.state.co.us <br />Jared Polis, Governor i Virginia Brannon, Director * } lg76 <br />