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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: <br />Inspection Period: <br />Inspection Date: <br />Pond #7 <br />Fourth Quarter 2007 <br />12/3/07 <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 partialty inased into bedrock and the embankment keyed into bedrock. <br />Side slopes are less than 2H:1V. The primary discharges south into Jeff Canyon <br />drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. Excellent . oderat Few Poor <br />2). Erosion forming Gullies: Extensive Some ew None <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes No c.-- <br />Atthe principal spillway inlet? Yes No c~-- <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 No (/ <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). !s erosion occurring at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes ~ No <br />Yes !~ No <br />Yes _(`_ No <br />Yes No ~"" <br />Just starting None <br />Page 1 of 2 <br />