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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9A ,,~ <br />Inspection Period: 3rd Quarter 2004 <br />Inspection Date: 9/30/04 <br />General Description or Reference to Site Plan: <br />This pond is located south-east of the area of rninirig scheduled for 20Ut-U2. The pond <br />is partially incised into bedrock and the embankment keyed into bedrock. <br />Side slopes are less than 2Ha V. The primary spillway discharyes south into Jeff Canyon. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: <br />2). Erosion forming Gullies: <br />3). Is wave action causing erosion: <br />On the Upsiream embankment? <br />At the principal spillway inlet? <br />Yes <br />Yes <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erosion can be attributed to: <br />Excellent Moderal ew Poor <br />r` <br />Extensive Some Fe ~ None <br />No v <br />No ,/ <br />No ~ <br />5). Is seepage occurring through the dam? Yes <br />Could this seepage cause potential instability? <br />No /~ <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 />page f of 2 <br />Yes ~ No <br />Yes r/ No <br />Yes 1/ No <br />Yes No %~ <br />Just starting None <br />