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COLORADO <br />Division of Rectamati, <br />Mining and Safety <br />Ms Miranda Kawcak <br />Seneca Property, LLC <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />20 August 2020 <br />Re: Seneca IIW Permit C1982057 <br />DRMS Adequacy Review of Surety Release Request SL7 <br />Dear Ms Kawcak: <br />The Division has completed its review of Seneca IIW SL7 received by the Division on 8 <br />June 2020. The Division's review comprised numerous rules with adequacy questions for <br />Rule 3.03.1(3)b). <br />Rule 3.031(3)b): Release of Performance Bonds <br />DRMS August 2020 <br />DRMS is unable to verify the contributions of suspended solids to streamflow or runoff as the <br />following documents were missing from the permit application. DRMS also notes that TSS <br />measurements at WSH7 between 2015 and 2019 register greater than pre mine concentrations. <br />1. Attachment E Sedimentology and Hydrology Supporting Information <br />2. All tables referenced in the Hydrology Demonstration, including <br />3. Tables 1 through 7 <br />4. Tables 13 through 15 <br />5. TSS data for Outfalls 006, 016 and 017. <br />The proposed decision date for this permitting action is 19 September 2020. Please provide your <br />response to DRMS with adequate time to review the requested materials. <br />Thank You <br />Robin Reilley, M.S. GISP <br />Environmental Protection Specialist 11 <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 <br />