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ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(15) <br />Mine: Lorencito <br />NPDES ID. No.: Pond fJ.9 (North) <br />Inspection Period: First Quarter 2007 <br />Inspection Date: 3!30/2007 <br />General Description or Reference !n Site Ptan: <br />This pond is located noM-east of the area of mining during for 2001-02. The pond <br />is partially incised into bedrock and the embankment keyed into bedroGc. <br />Side sbpes are less than 2H:1V. The primary spilhvay 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 />F~cceOent Moderate ~ Poor <br />Extensive Some Few None <br />Yes <br />Yes <br />No t/ <br />No ~ <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erceion can be attributed lb: <br />5). Is seepage oaxrrting through the dam? <br />Could this seepage cause potential inshability? <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 />_:--3j_°Is tkig~dischaige outlet free of restrictive material? <br />.4}. Isee¢sion occurting at the discharge outlet? <br />s . Evalt]aEe She severity: F~ctensive Moderate <br />-~_ .~ _ <br />No v- <br />Yes No l/ <br />Yes V No <br />Yes tr No <br />Yes ~' No <br />Yes No t~ <br />Just starting None <br />Page 1 <br />