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ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(15) <br />Mine: Lorencto <br />NPDES ID. No.: Pond #9A (South) <br />Inspecon Period: Frst Quarter 2007 <br />Inspection Date: 3/302007 <br />General Description or Reference to Site Plan: <br />This pond is located south-east of the area of mining during for 2001-02. The pond <br />is partiatly incased irno bedrock and the embankment keyed into bedrock <br />Side slopes are ~ than 2H:1 V. The primary spillway discharges south into Jeff Canyon. <br />EMt9AN1alAENT <br />1). Adequacy of the vegetative cover. F_xcelk~nt ~ Few Poor <br />2). Erosion forming Gullies: Extensive Some ~ None <br />3). -s wave scion posing erosion: <br /> On the Upstream embankment? Yes No ~ <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 <br />Coukt th~ seepage pose potential in5tabiTAt/t <br />No Fj <br />PRINCIPAL SPILLWAY <br />1). Is the prnncpal spillway system in working ordeR <br />.2). Is the inlet free of debris and riestridive material? <br />3j: `Isthe•dischaige outlet free of restrictive materiaYt <br />" 4). Is'er+LSzxr ocwning at the drscatarge outtht? <br />?. Eyeseverdy: Extensive Moderate <br />Yes y No <br />Yes ~ No <br />Yes !~- No <br />Yes No (/ <br />Just starting None <br />Page 1 <br />