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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: Fourth Quarter 2007 <br />Inspection Date: 12/3!2007 <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:1 V. 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 principal spillway inlet? <br />Excellent od to Few Poor <br />Extensive Some ~ None <br />Yes No r/ <br />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? Yes L~ No <br />2). Is the inlet free of debris and restrictive material? Yes ~i- No <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 />Page 1 of 2 <br />Yes ~_,._- No <br />Yes No i~~ <br />Just starting None <br /> <br />