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Figure V-4.2: Alternative Downspout Infiltration Trench System for <br /> Coarse Sand and Gravel <br /> from roof <br /> grass <br /> overflow f — — <br /> _—I I I—I I I—II I—I I I—I I mo— 6"min. <br /> ,�II <br /> �I—iiill���lll, III=IIL,;,I�I <br /> I�—111=III—III. I Ed I I I o Quo <br /> 1/2 s/4 III I �O 0 18"min. <br /> washed rock apo o�po��o <br /> IIIII 8�� 8� <br /> 2'min. 15'min. <br /> Note:Same length dimensions and site <br /> limitations as typical system <br /> NOT TO SCALE <br /> Alternative Downspout Infiltration Trench <br /> System for Coarse Sand and Gravel <br /> DEPARTMENT OF Revised June 2016 <br /> ECOLOGY please see http://www.ecy.wa.gov/copyrightht ml 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 />