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• 4. SEDIMENT PONDS <br />A. NPDES Ouarterly Reports <br />All sediment pond discharges were sampled and monitoring <br />data was reported to the appropriate State and Federal <br />agencies. Copies of the quarterly monitoring reports are <br />found in Exhibit 6. <br />B. Quarterly Inspections <br />The quarterly inspection reports are found in Exhibit 7. <br />All inspection reports indicate there are no problems <br />with any pond. <br />C. sediment survey <br />During 1991, TR-60 to Modify Sediment Control Structures, <br />was approved by CDMG. The SEDCAD sizing for Explosives <br />Storage Point 001, Landfill Point 002, and Shop/Office <br />Point 003, showed that both the runoff volume and the <br />sediment delivered to each pond is zero. Therefore, <br />adequate sediment storage for these three ponds is <br />guaranteed. <br />Due to excellent revegetation success on the reclaimed <br />minesite, sediment delivery to the HG8 pond appears to be <br />insignificant. More than adequate sediment storage <br />capacity currently exists in the HG8 pond. <br />A volumetric summary for sediment volumes in each pond <br />follows on Page 5. <br /> <br />4 <br />