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/„ 11 <br />4.7 Bio - Swales <br />• The Residential Collector roads within Trace shall have landscaped medians which can offer a <br />unique approach to water quality. Medians shall be inverted and will capture runoff from all ROW, <br />as the inside curb of both sides of traffic will be of the laydown or ribbon variety. This will allow <br />the roadway to sheet flow into the median, where vegetated infiltration strips can be utilized to <br />treat runoff. However, in cases where road grades exceed 8.5 %, it is not feasible for the medians <br />to be utilized for water quality and <br />curb and gutter must be used. <br />Illustration 33: Typical Laydown or <br />Ribbon Curb and Bio -Swale <br />Typical PA6w Curb <br />Tm%�cwi Nmu.N�«ww <br />%aa mamma q6m <br />tunas kaw�nwwn� capon <br />•,.,,. F Gam <br />",r;,r, u•w ns. ssaw� <br />t <br />wemspr�rv� -. <br />a 62r rm clanrK (*yaA ft <br />auroly Ro— to onlro p Swale <br />IS-Day Con— kcenh a 1500 psi <br />37 <br />