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m m m 9 9 9 %« <br />9 <br />6. For all insollarions. the fabric should be <br />anchored in a aeodi dug on the upslope side <br />of the posts. The trench should be at least 6 <br />inches deep and 6 inches wide. The fabric is <br />laid In the trench which Is then backfilled <br />and compacted. Figure 6.3*2 provides a <br />detail of fabric tnscallatioa <br />7. The filter fabric should be furnished in a <br />continuous roll to avoid splices. When a <br />splice cannot be avoided, it should be made <br />atafenoeposL The ^ric should be <br />oveAapped 6 inches, folded over and <br />securely futened. <br />MAINTENANCE <br />Silt fences require maintenance to preserve thdr <br />effectiveness. All silt fences should be inspected <br />iaunediaccly after each runoff event and at least daily <br />during prolonged ralnfalL Any required repairs <br />should be made immediately. When sediment <br />deposits reach approximately orte*half the height of <br />the silt fence, the sediment should be removed or a <br />second silt fertce installed. <br />Wire mesh reinforcement <br />(optlortal) 1 ^ Engineering fabric <br />Metal or w< <br />post or stake <br />< <br />Direction of <br />runoff flow <br />»• ------- , <br />•• -• • ' • a • <br />Natural soil * <br />• • • <br />Fabric anchorage <br />trench baddin with <br />tamped natural soil <br />* 6 inch minimum • <br />• * • <br />6 inch minimum <br />Note: Depending upon conTiguralion. attach fabric to wire mesh with <br />hog rings, steel posts with tie wires, or wood posts with staples. <br />Figure 6.3-2: Typical Installation for silt fence <br />«n/oA 0