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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: Pond #8 <br />Inspection Period: Second Quarter 2010 <br />Inspection Date: 4/30/10 ' <br />General Description or Reference to Site Plan: <br />This pond is located north ofthe 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 2HA V. The primary discharges north into a small drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: Excellent odes Few Poor <br />2). Erosion forming Gullies: Extensive Some None <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes No <br />At the principal spillway inlet? Yes No <br />4). Erosion of the downstream toe of the embankment? Yes No <br />Cause of erosion can be attributed to: <br />5). Is seepage occurring through the dam? Yes <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 restrictive material? <br />4). Is erosion occurring at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes ?- <br />Yes <br />Yes I,-- - <br />Yes <br />Just starting <br />No <br />No <br />No <br />No v' <br />None <br />No <br />Page 1 of 2