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Figure V-4.2:I Alternative Downspout Infiltration Trench System for <br /> Coarse Sand and Gravel <br /> t <br /> from roof <br /> vi <br /> grass <br /> ovierflow — — <br /> IIII,;,III, III=II'L=IiI—II ' <br /> —I I 1—III—I�I—III—III— <br /> 6"min. ��—��� '1—�! <br /> F—I I I=Ij <br /> 18"min. <br /> —III �'bo0 OoOo <br /> washed rock <br /> -IIE <br /> II I o�88�8�0 <br /> 2'min._ 15'min. <br /> I <br /> Note:Same length dimensions and site <br /> limitations as typical system <br /> i <br /> NOT TO SCALE <br /> Alternative Downspout Infiltration Trench <br /> System for Coarse Sand and Gravel <br /> l ' <br /> DEPARTMENT OF Revised June 2016 <br /> ECOLOGYplease see http I Y_1Www.ecy.wa.gov1copyHghLhtm1 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 4-Page 710 <br />