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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rute 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: <br />Inspection Period: <br />Inspection Date: <br />Pond ft,5 <br />Third Quarter 2007 <br />9!21/07 <br />General Description or Reference to Site Plan: <br />This pond is [orated West 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:1V. The primary discharges south into Cow Canyon drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. Excellent~'''IUloderat' Few Poor <br />2). Erosion forming Gullies: ~ Extensive Some ~- a None <br />,~ <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes No ~-°~ <br />At the principal spilhnray inlet? Yes No ~- <br />4). Erosion of the downstn~m toe of the embankment? Yes No tf <br />Cause of erosion can be attributed to: <br />5). Is seepage ocxurring through the dam? Yes No ,U: <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 fare of debris and n~trictive material? <br />3). Is the discharge outlet free of restrictive material? <br />4). Is erosion occx.irring at the discharge outlet? <br />Evaluate the severity: Extens'nre Moderate <br />Yes w°`- No <br />Yes ~>-- No <br />Yes `_,_.. __ No <br />Yes No ~..-°-- <br />Just starting None <br />Page 1 of 2 <br />