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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 <br />Inspection Period: Fourth Quarter 2006 <br />Inspection Date: 122612006 <br />General Description or Reference to Site Plan: <br />This pond is located nortli~ast of fire 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. Excellent ode Few Poor <br />2). Erosion forming Gullies: Extensive Some ~ None <br />3). is wave action causing erasion: v <br />On the Upstream embankment? Yes No <br />~ At the princpal spillway inlet? Yes ' No-Z- <br />4). Erosion of the downstream tce of the embankment? Yes No ~' <br />Cause of erosiori'i~h be attributed to: ' <br />5). Is seepageoccurring through the dam? Yes <br />Could thLs seepage cause potential instability? <br />No <br />PRINCIPAL SPILLWAY <br />1). Is the principal spillway system in working ordef? <br />2). Is the inlet free of debris and restrictive material? <br />3). is the discharge outlet fee of restrictive material? <br />4). Is erosion occurring at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes ~ No <br />Yes ` No <br />Yes ~~ No <br />Yes No ~~ <br />Just starting ~ None <br />Page 1 of 2 <br />