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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9 (North) <br />Inspection Period: First Quarter 2012 <br />Inspection Date: 3/31/2012 <br />General Description or Reference to Site Plan: <br />CDMR Rule 4.05.9(17) <br />This pond is located north-east Of the area of mining scheduled for 2001 -02. The pond <br />is partially incised into beds ck and the embankment keyed into bedrock. Side slopes <br />are less than 2H:1 V. The primary spillway discharges north into a small unnamed <br />drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. Excellent Few Poor <br />2). Erosion forming Gullies: Extensive Some None <br />3). Is wave action causing erosion: <br />On the Upstream embankment? <br />At the principal spillway inlet? <br />5). Is seepage occurring through the dam? <br />Could this seepage cause potential instability? <br />Yes <br />Yes <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erosion can be attributed to: <br />Yes No <br />No <br />No K <br />No k <br />PRINCIPAL SPILLWAY <br />1). Is the principal spillway system in working order? Yes X No <br />2). Is the inlet free of debris and restrictive material? Yes x No <br />3). Is the discharge outlet free of restrictive material? Yes No <br />4). Is erosion occurring at the discharge outlet? Yes No <br />Evaluate the severity: Extensive Moderate Just starting None <br />