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Florida Erosion and Sediment Control Inspector's Manual <br /> Construction Specifications <br /> Straw bale drop inlet filter <br /> 1 . Bales shall be either wire-bound or string-tied with the bindings oriented around <br /> the sides rather than over and under the bales . <br />�. 2 . Bales shall be placed lengthwise in a single row surrounding the inlet, with the <br /> ends of adjacent bales pressed together. ( See Plate 4 . 08a) <br /> 3 . The filter barrier shall be entrenched and backfilled . A trench shall be excavated <br /> around the inlet the width of a bale to a minimum depth of 4 inches ( 10 cm ) . After <br /> the bales are staked , the excavated soil shall be backfilled and compacted against <br /> the filter barrier. (See Plate 4 . 08b ) <br /> 4 . Each bale shall be securely anchored and held -in place by at least two stakes or <br /> rebars (See p . 4- 17 ) driven through the bale . <br />.. 5 . Loose straw should be wedged between bales to prevent water from entering <br /> between bales . <br />�. 6 . Gravel may be spread around the bales to improve stability . (See Plate 4 . 08c) <br /> Fabric drop inlet sediment filter <br /> 1 . Fabric shall be cut from a continuous roll to avoid joints . <br /> 2 . Stakes shall be 2" x 4" (5 cm x 10 cm ) wood (preferred ) or equivalent metal with a <br /> minimum length of 3 feet (90 cm ) . (See Plate 4 .08d ) <br />■• 3 . Staples shall be of heavy duty wire at least 1 /2-inch ( 13 mm) long . <br /> 4 . Stakes shall be spaced around the perimeter of the inlet a maximum of 3 feet (90 <br />• • cm) apart and securely driven into the ground minimum of 8 inches (20 cm) . A <br /> frame of 2" x 4" (5 cm x 10 cm ) wood shall be constructed around the top of the <br /> stakes for proper stability . <br /> 5 . A trench shall be excavated approximately 4 inches ( 10 cm ) wide and 4 inches ( 10 <br /> cm ) deep around the outside perimeter of the stakes . (See Plate 4 . 08e) <br /> 6 . The burlap shall be stapled to the wooden stakes , and 8 inches (20 cm ) of the fabric <br /> shall be extended into the trench . The height of the filter barrier shall be a minimum <br /> of 15 inches (38 cm) and shall not exceed 18 inches (45 cm ) . <br /> 7 . The trench shall be backfilled and the soil compacted over the burlap . <br /> r <br /> 4-38 <br />