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Florida Erosion and Sediment Control Inspector's Manual <br /> 4 . 07 BRUSH BARRIER <br /> ( ES BMP 1 . 07 ) <br /> .. Definition <br /> A temporary sediment barrier constructed at the perimeter of a disturbed area from the <br /> residue materials available from clearing and grubbing the site . <br /> Purpose <br /> AW <br /> To intercept and retain sediment from disturbed areas of limited extent , preventing sediment <br /> AW from leaving the site . <br /> Conditions Where Practice Applies <br /> MW Below disturbed areas subject to sheet and rill erosion , where enough residue material is <br /> available for construction of such a barrier. <br /> 4 <br /> Planning Considerations <br />,r Organic litter and spoil material from site clearing operations is usually burned or hauled away <br /> to be dumped elsewhere . Much of this material can be used effectively on the construction <br /> site itself. During clearing and grubbing operations , equipment can push or dump the mixture <br /> 4W of limbs , small vegetation and root mat along with minor amounts of soil and rock into <br /> windrows along the toe of a slope where erosion and accelerated runoff are expected . <br /> Anchoring a filter fabric over the berm enhances the filtration ability of the barrier. Because <br /> ow brush barriers are fairly stable and composed of natural materials , maintenance requirements <br /> are small . <br /> a Design Criteria <br /> A formal design is not required . <br /> Construction Specifications <br />+•• 1 . The height of a brush barrier shall be a minimum of 3 feet (90 cm) . <br /> 2 . The width of a brush barrier shall be a minimum of 5 feet ( 1 . 5 m) at its base . (The <br />�• sizes of brush barriers may vary considerably based upon the amount of material <br /> available and the judgment of the design engineer. ) <br /> 3 . The barrier shall be constructed by piling brush, stone , root mat and other material <br /> from the clearing process into a mounded row on the contour. <br /> W If a filter fabric is used ( Plate 4 . 07a) : <br /> 4 . The filter fabric shall be cut into lengths sufficient to lay across the barrier from its <br /> upslope base to just beyond its peak. Where joints are necessary, the fabric shall <br /> 4-32 <br /> r <br />