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QUARTERLY SEDIMENTATION POND INSPECTION REPORT • ~_ " "' ~ ~'~ <br />•>~ '~~" i-~ >~ = CDMR Rule~4.05.9(17) •~ <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9A <br />Inspection Period: 4~" Quarter 2002 <br />Inspection Date: 12/26/02 <br />General Description or Reference to Site Plan: <br />This pond is located south-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:1V. The primary spillway discharges south into Jeff Canyon. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: Excellent Moderate Few <br />2). Erosion forming Gullies: Extensive Some !~ None <br />3). Is wave action causing erosion <br />On the Upstream embankment? Yes No L, <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? <br />Could this seeaaoe cause poten <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 <br />Yes <br />Yes ~ <br />Yes ~ <br />Yes <br />Just starting <br />No v <br />No <br />No <br />No <br />No <br />None <br />Page 1 of 2 <br />