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Figure V-4.4: Typical Downspout Dispersion Trench <br />N. <br />'y'•i� ssi� yvi part._ <br />24" min. washed rock <br />Trench X-Section <br />Plan View of Roof <br />Source: King County Department of Natural Resources, 1998 <br />rf� <br />level outlet <br />catch basin or <br />I drain <br />2' x 10' <br />level trenches <br />a1CB <br />standard dispersion <br />trench WI notched grade <br />board length 10' per 350 <br />sq. ft. of roof area <br />NOT TO SCALE <br />Typical Downspout Dispersion Trench <br />Revised December 2016 <br />DEPARTMENT OF <br />ECOLOGY please see httpYAvww.ecywa.gov/aopyrighthtml for copyright notice including permissions, <br />State of Washington limitation of liability, and disclaimer. <br />2019 Stormwater Management Manual for Western Washington <br />Volume V - Chapter - Page 715 <br />