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Figure 11-4.2.16 Cross Section of Sediment Trap <br />Surface area determined <br />at top of weir <br />17'M i n4' Min. <br />1' Min. Overflow <br />1' Min. <br />0 T <br />y T II'Min. <br />3.5'-5' <br />of 1.5' Min. <br />Flat Bottom <br />3/a" - 1.5 <br />Washed gravel <br />Note: Trap may be formed by berm or by Geotextile <br />partial or complete excavation. 2" - 4" Rock <br />Rip Rap <br />vaa� <br />DEPARTMENT OF <br />ECOLOGY <br />State of Washington <br />Discharge to <br />stabilized <br />conveyance, <br />outlet, or level <br />spreader <br />NOT TO SCALE <br />Figure II-4.2.16 <br />Cross Section of Sediment Trap <br />Revised November 2015 <br />Please see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, <br />limitation of liability, and disclaimer. <br />2014 Stormwater Management Manual for Western Washington <br />Volume II - Chapter 4 - Page 386 <br />