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Florida Erosion and Sediment Control Inspector's Manual <br /> do 4 . 08 STORM DRAIN INLET PROTECTION <br /> ( ES BMP 1 . 08 ) <br /> Definition <br /> A sediment filter or an excavated impounding area around a storm drain drop inlet or curb <br /> �" inlet. <br /> Purpose <br /> dw <br /> To prevent sediment from entering storm water conveyance systems prior to permanent <br /> AM stabilization of the disturbed area . <br /> Condition Where Practice Applies <br /> Where storm drain inlets are to be made operational before permanent stabilization of the <br /> disturbed drainage area . Different types of structures are applicable to different conditions <br /> .. (see Plates 4 . 08a through 4 . 08h ) . <br /> Planning Considerations <br />*W <br /> Storm sewers which are made operational before their drainage area is stabilized can convey <br /> large amounts of sediment to receiving waters . In case of extreme sediment loading , the <br /> storm sewer itself may clog and lose most of its capacity. To avoid these problems , it is <br /> necessary to prevent sediment from entering the system at the inlets . <br /> This section contains several types of inlet filters and traps which have different applications <br /> dependent upon site conditions and type of inlet. Other innovative techniques for <br /> accomplishing the same purpose are encouraged , but only after specific plans and details are <br /> .,„ submitted to and approved by the stormwater permitting agency. <br /> Note that these various inlet protection devices are for drainage areas of less than one acre <br />,. (0 .4 ha) . Runoff from large disturbed areas should be routed through a TEMPORARY <br /> SEDIMENT TRAP - Section 4 . 25 ( ES BMP 1 . 25 ) . <br />�.. Design Criteria <br /> 1 . The drainage area shall be no greater than 1 acre (0 .4 ha ) . <br /> 2 . The inlet protection device shall be constructed to facilitate clean out and disposal <br /> of trapped sediment and to minimize interference with construction activities . <br /> 3 . The inlet protection devices shall be constructed so that any resultant ponding or <br /> stormwater will not cause excessive inconvenience or damage to adjacent areas or <br /> structures . <br /> 4 . Design criteria more specific to each particular inlet protection device will be found <br /> on Plates 4 . 08a-h . <br /> 4-34 <br />