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and Sediment Control Inspectors Manual <br />Gravel and wire mesh drop inlet sediment filter <br />Wire mesh shall be laid over the drop inlet so that the wire extends a minimum of <br />one foot (30 cm) beyond each side of the inlet structure. Hardware cloth or <br />comparable wire mesh with 1/2 inch (13 mm) openings shall be used. If more than <br />one strip of mesh is necessary, the strips shall be overlapped at least 1 ft. (30 cm). <br />2. FDOT No. 1 Coarse Aggregate (1.5" to 3.5" stone)(4 - 9 cm) shall be placed over <br />the wire mesh as shown on Plate 4.08c. The depth of stone shall be at least 12 <br />inches (30 cm) over the entire inlet opening. The stone shall extend beyond the <br />inlet opening at least 18 inches (45 cm) on all sides. (See Plate 4.08f) <br />3, If the stone filter becomes clogged with sediment so that it no longer adequately <br />performs its function, the stones must be pulled away from the inlet, cleaned and <br />replaced. <br />NOTE: This filtering device has no overflow mechanism. Therefore; ponding is likely <br />especially if sediment is not removed regularly. This type of device must never be used <br />where overflow may endanger an exposed fill slope. Consideration should also be given to <br />the possible effects of ponding on traffic movement, nearby structures, working areas, <br />adjacent property, etc. <br />DEPTH) <br />RUNOFF WATER <br />WITH SEDIMENT <br />Jill <br />.011"WIRE MESH <br />SEDIMENT <br />FILTERED <br />WATER <br />i <br />Theis method of inlet protection Ismapplicable where heavy concentratadflOws are expected, but not where panding <br />around the smotura might cause excessive Inconvience or damage to adjacent structures and unprotected areas. <br />Gravel Shall be .. <br />Plate 4.08f Gravel and Wire Mesh Drop Inlet Sediment Filter <br />Source: Virginia DSWC <br />4-40 <br />