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Mine: Trapper Mine <br />Permit No.: C- 1981 -010 <br />Report Year: <br />Submitted by: <br />Date received by Division: <br />Review Checklist for Annual Hydrology Report <br />2013 <br />Trapper Mining, Inc. <br />March 18, 2013 <br />Date of review: <br />DRMS reviewer: <br />April 16, 2014 <br />Jared Ebert <br />Requirement <br />Regulation <br />Reviewed <br />Comment <br />A. Filing frequency <br />CDRMS <br />of hydrology <br />regulation <br />Yes <br />report <br />4.05.13(4)(c) <br />March 15 <br />according to <br />B. Timely filing of <br />Sections <br />4.8.5.1 and <br />Yes <br />Trapper Mine informed the Division the AHR would be a <br />hydrology report <br />4.8.5.2 <br />few days late. <br />permit C -81- <br />010 <br />C. Filing frequency <br />of NPDES <br />NPDES <br />Discharge <br />permit CO- <br />Yes <br />Monitoring <br />0032115 <br />Reports <br />D. Timely filing of <br />NPDES <br />Discharge <br />permit CO- <br />Yes <br />n <br />Monitoring <br />00332115 <br />Reports <br />One exceedece of the primary effluent limitations was <br />E. NPDES <br />NPDES <br />reported at outfall 001 for Total Suspended Solids in the <br />discharge <br />permit CO- <br />Comment <br />second quarter of 2013. According to the report, a <br />limitations <br />0032115 <br />3 <br />precipitation event of .5 inches of moisture combined with <br />spring snowmelt created high flows at the site and that the <br />exceedance is applicable for the alternative reporting limits. <br />F. Basic Standards <br />CWQCC <br />The classifications set forth in Regulation 31 were assigned <br />for Surface Water <br />Regulation <br />Comment <br />to specific state surface waters. See discussion on hlstream <br />31 <br />Numeric Standards (item G. below). <br />Trapper's discharges from several NPDES outfalls drain to <br />Segment 3b of the Lower Yampa River. Trapper's NPDES <br />discharge limitations are based on which of the <br />G. histream <br />CWQCC <br />constituents in Trapper's effluent are likely to cause an <br />Numeric <br />Regulations <br />Comment <br />exceedance of Segment 3b's instream numeric standards. <br />Standards <br />31 and 37 <br />Trapper's discharges in 2013 appeared to comply with the <br />discharge limitations set forth in the NPDES permit. <br />Therefore, it is reasonable to believe that Trapper's <br />discharges did not violate Segment 3b's instream numeric <br />standards. <br />H. Antidegradation <br />CWCC <br />regulations <br />Trapper is not subject to the Antidegradation Rule because <br />Rule for Surface <br />3.1.9(2) and <br />NA <br />the receiving waters (Segment 3b of Lower Yampa River) <br />"Use- <br />Water <br />3 3 0 <br />are designated Protected." <br />Page 1 <br />