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Figure V-4.2: Alternative Downspout Infiltration Trench System for <br /> Coarse Sand and Gravel <br /> from roof <br /> i <br /> i <br /> i <br /> i <br /> grass ..........� �,� <br /> overflow •/ <br /> iii—iii—�n ni i—islIl,�, , 111E1I III,i�I <br /> =-1 I-1 I I—I I I-1 I I= 6"min. <br /> 1_11 I-11 I-111 —i�1=1 <br /> 111—III--�Qoo "� ac <br /> 3 11'� 1;.*i� <br /> -/a 0040 <br /> • <br /> 0 18"min. <br /> unshed rock I ( 04�Q o 00 <br /> Hol- <br /> 2'min. —Rai+ 15'min. <br /> Note:Same length dimensions and site <br /> limitations as typical system <br /> NOT TO SCALE <br /> V1� <br /> Alternative Downspout Infiltration Trench <br /> �r�i► System for Coarse Sand and Gravel <br /> DEPARTMENT OF Revised June 2016 <br /> ECOLOGY Please see http://www.ecywa.govicopyrighthtml 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 />