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Florida Erosion and Sediment Control Inspector's Manual *� <br /> 4 . 25 TEMPORARY SEDIMENT TRAP <br /> ( ES BMP 1 . 25 ) <br /> Definition <br /> A small temporary ponding area formed by excavation and/or an embankment across a <br /> drainageway. .� <br /> Purpose <br /> To detain sediment-laden runoff from small disturbed areas long enough to allow most of the <br /> sediment to settle out thereby protecting drainageways , properties, and rights-of--way from <br /> sedimentation . <br /> Conditions Where Practice Applies <br /> 1 . A sediment trap is usually installed in a drainageway , at a storm drain inlet or at <br /> other points of discharge from a disturbed area . <br /> .r <br /> 2 . Below drainage areas of 5 acres (2 ha ) or less . <br /> 3 . Where the sediment trap will be used less than 18 months . <br /> 4 . The sediment trap may be constructed either independently or in conjunction with <br /> a TEMPORARY DIVERSION DIKE - Section 4 . 15 ( ES BMP 1 . 15) . ` <br /> Planning Considerations <br /> The sediment trap should be located to obtain the maximum storage benefit from the terrain , <br /> for ease of clean out and disposal of the trapped sediment and to minimize interference with <br /> construction activities . .. <br /> Sediment traps should be used only for small drainage areas . If the contributing drainage <br /> area is greater than 5 acres (2 ha), refer to SEDIMENT BASINS - Section 4 . 26 ( ES BMP <br /> 1 . 26 ) . <br /> +r <br /> Sediment must be periodically removed from the trap . Plans should detail how this sediment <br /> is to be disposed of, such as by use in fill areas on site or removal to an approved off-site <br /> dump . <br /> Sediment traps , along with other perimeter controls , shall be installed before any land <br /> disturbance takes place in the drainage area . .r <br /> 4-68 <br />