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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9A (South) <br />Inspection Period: Third Quarter 2012 <br />Inspection Date: 9/13/12 <br />Cause of erosion can be attributed to: <br />CDMR Rule 4.05.9(17) <br />General Description or Reference to Site Plan: <br />This pond is located south -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:1 V. The primary spillway discharges south into Jeff Canyon. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: Excellent Moderate Few Poor <br />2). Erosion forming Gullies: Extensive Some CJ 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 v <br />5). Is seepage occurring through the dam? <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 />Page 1 of 2 <br />Yes No <br />Yes L <br />Yes / <br />Yes // <br />Evaluate the severity: Extensive Moderate Just starting None <br />No <br />No <br />No <br />4). Is erosion occurring at the discharge outlet? Yes No <br />