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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorenc'tto <br />NPDES ID. No.: Pond #5 <br />Inspection Period: Fourth Quarter 2007 <br />Inspection Date: 12/3/07 <br />General Description or Reference to Site Plan: <br />This pond is located West of the area of mining scheduled for 2001-02. The pond <br />is partiatty incised into bedrock and the embankment keyed into bedrock. <br />Side slopes are less than 2H:1V. The primary discharges south into Cow Canyon drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative mover. <br />2). Erosion forming Gullies: <br />3). Is wave action causing erosion: <br />On the Upstream embankment? <br />At the principal spillway inlet? <br />Excellent odes Few Poor <br />Extensive Some ~ None <br />Yes ______-__ No --- <br />Yes No __v___ <br />4). Erosion of the downstream toe of the embankment? Yes No ,~,~ <br />Cause of erosion can be attributed to: <br />5). fs seepage occurring through the dam? Yes_,_, No C~ <br />Could this seepage cause potential instability? <br />PRINCIPAL SPILLWAY <br />1). Is the principal spillway system in working order? <br />2). is the inlet free of debris and restrictive material? <br />3). is the discharge outlet free of nrstrictive material? <br />4). Is erosion occurring at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes ~ <br />_____- <br />Yes v <br />Yes t~- <br />~---- <br />No <br />__.__-- <br />No <br />No <br />Yes No v <br />Just starling None <br />Page 1 of 2 <br />