Laserfiche WebLink
Chapter 4-Site-Specific Industrial Storm Water BMPs • <br />Sediment Trap S <br />What Is It <br />A sediment trap is formed by excavating a pond or by placing an earthen embankment across a low <br />area or drainage swale. An outlet or spillway is constructed using large stones or aggregate to <br />slow the release of runoff. The trap retains the runoff long enough to allow most of the silt to <br />settle out. <br />7 <br />Cross-Section AA1 <br />• <br /> <br />FIGURE 4.25 TYPICAL SEDIMENT TRAP <br />(Modified from Commonwealth of Virginia, 1980) <br />When and Where to Use It <br />A temporary sediment trap may be used in conjunction with other temporary measures, such as <br />gravel construction entrances, vehicle wash areas, slope drains, diversion dikes and swales, or <br />diversion channels. This device is appropriate for sites with short time schedules. <br />4-86