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QUARTERLY SEDIMENTATION POND INSPECTION REPORT - ~ ~';tts~ <br />~, <br />J <br />• <br />r1 <br />LJ <br />- ~- ' -^' CDMR Rule 4.05:6(13) <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9 <br />Inspection Period: 4-qtr 2001 <br />Inspection Date: 20-Dec-01 <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. <br />Side slopes are less than 2H:1 V. The primary discharges north into a small drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: Excellent Moderate Few Poor (~G:d COrrS`I~t~ <br />2). Erosion forming Gullies: Extensive Some Few None <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes No 1-- <br />At the principal spillway inlet? Yes No / _ <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? <br />2). Is the inlet free of debris and restrictive material? <br />3). Is the discharge outlet free of restrictive material? <br />4). Is erosion occurring at the discharge outlet? <br />Evaluate the severity: Extensive Moderate <br />Yes L- No <br />Yes L No <br />Yes ( No <br />Yes No C.. <br />Just starting None <br />Page 1 of 2 <br />