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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9 {North) <br />Inspection Period: Third Quarter 2007 <br />Inspection Date: 9!2112007 <br />General Description or Reference to Site Plan: <br />This pond is located north-east of the area of mining scheduled for 2001-02. The pond <br />is partially incised into bedrock and the embankment keyed into bedrock. Side slopes <br />are less than 2H:1V. The primary spillway discharges north into a small unnamed <br />drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. <br />2). Erosion forming Gullies: <br />3}. Is wave action causing erosion: <br />On the Upstream embankment? <br />At the prinapal spillway inlei? <br />Excellent plod ra~ <br />Extensive Some <br />4). Erosion of the downstream toe of the embankment? <br />Cause of erosion can be attributed to: <br />Few Poor <br />~~ None <br />Yes <br />Yes <br />Yes <br />5). Is seepage occurring through the dam? Yes No <br />Could this seepage cause potential instability? <br />PRINCIPAL SPILLWAY <br />1). Is the prinapal spillway sysfiem 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 ~--__ <br />No y' <br />No ~-' <br />No U- <br />No <br />No <br />No <br />Yes No ~ <br />Just starting None <br />Page 1 of 2 <br />