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Florida Erosion and Sediment Control Inspector's Manual <br /> 4 . 17 TEMPORARY RIGHT-OF -WAY DIVERSION <br /> ( ES BMP 1 . 17 ) <br /> Definition <br /> A ridge of compacted soil or loose rock or gravel constructed across disturbed rights-of-way <br /> and similar sloping areas . <br /> Purpose <br /> To shorten the flow length within a long sloping right-of-way, thereby reducing the erosion <br /> potential by diverting storm runoff to a stabilized outlet or sediment trapping device . <br /> Conditions Where Practice Applies <br /> Generally, earthen diversions are applicable where there will be little or no construction traffic <br /> within the right-of-way. Gravel structures are more applicable to roads and other rights-of-way <br /> which accommodate vehicular traffic. <br /> Planning Considerations <br /> Construction of utility lines and roads often requires the clearing of long strips of right-of-way <br /> over sloping terrain . The volume and velocity of stormwater runoff tend to increase in these <br /> cleared strips and the potential for erosion is much greater since the vegetative cover is <br /> diminished or removed . To compensate for the loss of vegetation , it is usually a good practice <br /> to break up the flow length within the cleared strip so that runoff does not have a chance to <br /> concentrate and cause erosion . At proper spacing intervals , Temporary Right-of-Way <br /> Diversions can significantly reduce the amount of erosion which will occur until the area is <br /> permanently stabilized . <br /> Design Criteria <br /> No formal design is required . The following criteria shall be met: ,r <br /> Drainage Area <br /> Less than 5 acres (2 ha ) . For larger drainage areas use a DIVERSION - Section 5 . 18 ( ES <br /> BMP 1 . 18 ) . <br /> Dimensions <br /> The minimum allowable height measured from the upslope side of the diversion is 18 inches <br /> (45 cm) . The minimum top width shall be 2 feet (60 cm ) and the base width minimum is 6 feet <br /> ( 1 . 8 m ) . (See Plate 4 . 17a ) <br /> rr <br /> 4-64 <br /> yr <br />