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QUARTERLY SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(17) <br />Mine: Lorencto <br />NPDES ID. No.: Pond #5 <br />Inspection Period: Fourth Quarter 2006 <br />Inspection Date: 12/26/06 <br />General Descriptton or Reference to Site Plan: <br />This pond is located West 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 sbpes are less than 2H:1V. The primary discharges south into Cow Canyon drainage. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. Excellent ode Few Poor <br />2). Erosion forming Gullies: Extensive Some Fe None <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes • No <br />At the principal spilMray inlet? Yes No <br />4). Erosion of the downstream toe of the embankment? Yes No f/ <br />Cause of erosion can be attributed to: <br />5). Is seepage occurring through the dam? Yes <br />Could this seepage cause potential insMabilily? <br />No y <br />PRINCIPAL SPILLWAY <br />1). Is the principal spiiMray 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: Extensve Moderate <br />Yes <br />Yes . <br />Yes <br />Yes No !~ <br />Just starting None <br />No 1r <br />No (~ <br />No +~ <br />Page 1 of 2 <br />