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catches all but the finest sediment particles and prevents large amounts of sediment originating in <br /> the sediment basin from entering Turkey Creek. Testing of this method with actual pond water <br /> pumped out and into the water truck shows the filter sock to be quite effective. Of course the sock <br /> needs to be cleaned of sediment once in awhile and that can be done by reverse flushing some <br /> place where the cleanings cannot enter Turkey Creek <br /> Cleaning Out the Sediment Basin <br /> Eventually the sediment basin becomes so full of sediment that runoff cannot even get into <br /> the basin through the culvert. When that happens, the sediment must be cleaned out. But the <br /> sediment is usually saturated with water and being composed of very fine particles contains a large <br /> amount of water that has accumulated and needs to be safely released back into hydrological <br /> system in Turkey Creek. <br /> To do this the top water is first removed using one of the two methods described. The <br /> sediment then tends to drain some through infiltration and the upper portion can be a bit more <br /> solid. Cleaning is almost always done when the risk of large runoff events is low. The upper more <br /> drained portion of the sediment is then removed until water in the sediment fills the excavation <br /> with water draining out of the sediment. This water can then be pumped back to the stream as <br /> described previously as Method 1 or 2. The deeper the excavation goes the drier the sediment <br /> becomes through draining. And by the time all the sediment is removed the water it contained will <br /> have been returned to Turkey Creek by pumping or infiltration. And the sediment is dry enough <br /> that it can be moved elsewhere. <br /> Technical Revision Menzer Quarry M-1973-009-HR June 2021 Page 7 of 7 <br />