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COLORADO <br /> a Division of Reclamation, <br /> Mining and Safety <br /> Department of Natural Resources <br /> Mr. Connor Drinkard <br /> DRMS <br /> 6 June 2022 <br /> Re: Lorencito Canyon Mine; Permit C1996084 <br /> DRMS Preliminary Adequacy Review of Permit Renewal Five (RN5) <br /> Dear Connor: <br /> The Division has completed its preliminary review of Lorencito Canyon Mine's permit <br /> (C1996084), renewal RN5 received by the Division on 3 May 2022. My review <br /> comprised the following rules: <br /> 2.04.7 2.05.3(4) 2.05.6(1) <br /> 2.05.6(4) 2.06.8 <br /> Adequacy issues are numbered in italics below. <br /> Rule 2.04.7 Hydrology Description <br /> DRMS June 2022 <br /> Permit section 2.04.7 describes the hydrology characteristics of the site (pages 2.04-9 through 2.04-13) <br /> for groundwater and for surface water pages 2.04-25 through 2.04-29,Exhibit 8 and Map 2.04.7-1. <br /> o The water quality description comprises pages 2.04-21 through 2.04-31 <br /> o Ownership of wells is described beginning on page 2.04-32 of the permit. <br /> o Protection of the hydrologic balance is addressed in Section 2.05-6.3 of the permit. <br /> This section of the permit appears to adequately address the above cited rule with the exception of: <br /> Given climate change,please verify that the hydrologic loss mechanisms; springs,evapotranspiration and <br /> precipitation regimes continue to reflect the values stated in the permit(precipitation: 16.32 and 14.94 <br /> in/yr depending on altitude). <br /> 1. Please provide the data and the data analysis of precipitation and evaporation for the past 15 <br /> years as supplemental pages to this section of the permit. <br /> flF'�010 <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br /> Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director * 1876 * <br />