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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: Pond A6 <br />Inspection Period: Third Quarter 2005 <br />Inspection Date: 12/30/05 <br />General Description or Reference to Site Plan: <br />This pond is located South of the area of mining scheduled for 2001-02. The pond <br />is partially incised into bedrock and the embankment keyed into bedrock, <br />Side slopes are less than 2H:iV. The primary discharges south into Jeff Canyon drainage. <br />EMBANKMENT <br />1). Adequacy of fhe vegetative cover. Excellent E"Moderatg Few Poor <br />2). Erosion forming Gullies: Extensive Some <br />3). Is wave action puling erosion: <br />On the Upstream embankment? Yes _ <br />At the principal spillway inlet? Yes <br />4). Erosion of the downstream toe of the embankment? Yes _ <br />Cause of erosion can be attributed to: <br />No ~ <br />No v- <br />No /~-- <br />None <br />5). Is seepage occurring through the dam? Yes <br />Could this seepage puce potential instability? <br />No !~ <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 restrictive material? <br />4). Is erosion oaxrrring at the discharge outlet? <br />Evaluate the severity. Extensive Moderate <br />Yes ~ No <br />Yes ~--- No <br />Yes L_._-- No <br />Yes No f~- <br />Just starting None <br />Page 1 of 2 <br />