Laserfiche WebLink
- z <br />I• <br />• <br />QUARTERLY SEDIMENTATION POND INSPECTION REPORT~'~ ''"~=~~1='zr~"~j=' <br />- ... - -' CDMR Rule 4.05.6(13) - <br />Mine: Lorencito <br />NPDES ID. No.: Pond #9A <br />Inspection' Period: 4-qtr 2001 <br />Inspection Date:' `-20-Dec-Oi <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:1 V, The primary spillway discharges 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 Upstream embankment? <br />At the principal spillway inlet? <br />Excellent Moderate Few <br />Extensive Some Few <br />Yes <br />Yes <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erosion can be attributed to: <br />• <br />No V <br />No (~ <br />No [v <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 />Yes ~- <br />Yes [~- <br />Yes (~ <br />Yes <br />Just starting None <br />Poor /v4~ r~M~/~-`L~lBl~ <br />None <br />No <br />No <br />No <br />No f/ <br />Page 1 of 2 <br />