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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: Pond fJ9 (North) <br />Inspection Period: Second Quarter 2007 <br />Inspection Date: 61272007 <br />General Description or Reference to Site Plan: <br />This pond is located northeast of the area of mining scheduled for 2001-02. The pond <br />is partialy incised into bedrock and the embankment keyed into bedrock. Side slopes <br />are less than 2H:1 V. The primary spilM2y discharges north into a small unnamed <br />drainage. <br />EMBANKINENT <br />1 }. Adequacy of the vegetative Dover. <br />2). Erosion forming Gullies: <br />3). Is wave action posing erosion: <br />On the Upstream embankment? <br />At the princpal spillway inlet? <br />Excellent Moderate Few Poor <br />Extensive Some Few None <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erosion pn be alto"bated to: <br />5). Is seepage occurring through the dam? Yes <br />Could this seepage pose potential instat>iliiy? <br />Yes _ <br />Yes . <br />. No ~" <br />No ~- <br />No i~- <br />No !i <br />PRINCIPAL SPILLWAY <br />1). Is the principal spilMray system in working order? <br />2). Is the inlet free of debris and restrictive material? <br />3). Is the.discharge outlet free of nestrictive material? <br />4). Is erosion oaxrning at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes i'- <br />Yes V- <br />Yes `- <br />Yes No ~ <br />Just starting None <br />No <br />No <br />No <br />Page 1 of 2 <br />