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Chapter 4 - Best Management Practices for Erosion and Sediment Control <br /> 4.03 TEMPORARY GRAVEL CONSTRUCTION ENTRANCE & EXIT <br /> ( ES BMP 1 . 01 ) <br /> Definition <br /> A stone stabilized pad located at points of vehicular ingress and egress on a construction <br /> site . <br /> Purpose <br /> To stabilize entrances to the construction site and reduce the amount of sediment <br /> _ transported onto public roads by motor vehicles or runoff. <br /> Conditions Where Practice Applies <br /> Wherever traffic will be leaving a construction site and moving directly onto a public road or <br /> other paved area . <br /> " Planning Considerations <br /> Construction entrances provide an area where mud can be removed from construction <br />•' vehicle tires before they enter a public road . If the action of the vehicle traveling over the <br /> gravel pad is not sufficient to remove most of the mud , then the tires must be washed <br /> before the vehicle enters a public road . If washing is used , provisions must be made to <br /> intercept the wash water and trap the sediment before it is carried off-site . Construction <br /> entrances should be used in conjunction with the stabilization of construction roads to <br /> reduce the amount of mud picked up by construction vehicles . <br /> Design Criteria <br /> Aggregate Size <br /> FDOT No . 1 Coarse Aggregate ( 1 . 5 - 3 . 5 inch stone) (4 - 9 cm) should be used . Wood <br />.. chips may be used for single family residential construction , provided that they can be <br /> prevented from floating away in a storm . <br /> Entrance Dimensions <br /> The aggregate layer must beat least 6 inches ( 15 cm) thick. It must extend the full width of <br /> the vehicular ingress and egress area . The length of the entrance must be at least 50 feet <br /> (20 m) . The entrance must widen at its connection to the roadway in order to <br /> accommodate the turning radius of large trucks . (See Plate 4 .03a) <br /> 4-7 <br />