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DMA 2 <br />DMA 3 <br />DMA 5 <br />DMA 6 <br />DMA 1 <br />DMA 4 <br />PROJECT # <br />DATE: <br />PROFESSIONAL SEAL <br />DRAWN BY: <br />CHECKED BY: <br />24144 <br />ABV/AZ <br />AUS <br />REVISIONS <br />NO.DESCRIPTION DATE <br />2/17/2026 <br />CIVIL ENGINEERING <br />INFO@YCG.IOOREGON <br />23 <br />1 <br /> <br />O <br />L <br />D <br /> <br />B <br />E <br />R <br />N <br />A <br />L <br /> <br />A <br />V <br />E <br />PL <br />E <br />A <br />S <br />A <br />N <br />T <br />O <br />N <br />CA <br />L <br />I <br />F <br />O <br />R <br />N <br />I <br />A <br />Z: <br />\ <br />S <br />H <br />A <br />R <br />E <br />D <br />\ <br />_ <br />P <br />R <br />O <br />J <br />E <br />C <br />T <br />S <br />\ <br />2 <br />4 <br />1 <br />4 <br />4 <br />- <br />2 <br />3 <br />1 <br /> <br />O <br />L <br />D <br /> <br />B <br />E <br />R <br />N <br />A <br />L <br />- <br />P <br />L <br />E <br />A <br />S <br />A <br />N <br />T <br />O <br />N <br />\ <br />_ <br />D <br />W <br />G <br />\ <br />P <br />U <br />D <br />- <br />P <br />H <br />A <br />S <br />E <br />\ <br />2 <br />4 <br />1 <br />4 <br />4 <br />- <br />S <br />T <br />O <br />R <br />M <br />. <br />D <br />W <br />G <br /> <br />2/ <br />1 <br />7 <br />/ <br />2 <br />0 <br />2 <br />6 <br /> <br />1 <br />1 <br />: <br />1 <br />0 <br /> <br />A <br />M <br />NOT <br /> <br />F <br />O <br />R <br /> <br />C <br />O <br />N <br />S <br />T <br />R <br />U <br />C <br />T <br />I <br />O <br />N <br />SHEET # <br />SHEET TITLE: <br />SCALE: <br />WASHINGTON <br />CALIFORNIA WWW.YCG.IO <br />DE <br />V <br />E <br />L <br />O <br />P <br />M <br />E <br />N <br />T <br /> <br />S <br />E <br />T <br />BE <br />R <br />N <br />A <br />L <br /> <br />M <br />U <br />L <br />T <br />I <br />- <br />F <br />A <br />M <br />I <br />L <br />Y <br /> <br />R <br />E <br />S <br />I <br />D <br />E <br />N <br />T <br />I <br />A <br />L <br />SCALE:1"=10' <br />LEGEND <br />IMPERVIOUS AREA <br />PROPOSED PERVIOUS - LANDSCAPINGSITE DATA <br />TOTAL DISTURBED AREA 21,081 SF <br />TOTAL PERVIOUS AREA 6,192 SF <br />TOTAL IMPERVIOUS AREA 13,153 SF <br />TOTAL SELF-TREATED AREA 1,736 SF <br />SCALE: 1" = 10' <br />0 5 10 15 20 <br />AU <br />G <br />U <br />S <br />T <br />I <br />N <br />E <br /> <br />S <br />T <br />OLD BERNAL AVE <br />PROPOSED IMPERVIOUS - GRAVEL <br />FLOW THROUGH PLANTER SIZING CALCULATIONS <br />AREA <br />NO.AREA (SF)IMPERV. (SF)LANDSCAPE <br />(SF) <br />SELF-TREATED <br />(SF) <br />EFFECTIVE <br />IMPERV. AREA <br />(SF) <br />TREATMENT <br />REQUIRED (SF) <br />TREATMENT <br />PROVIDED (SF)SIZING METHOD TREATMENT TYPE <br />2 10,629 5,347 3,546 1,736 5,702 228 237 4% METHOD FLOW-THROUGH PLANTER <br />3 2,117 1,439 678 -1,507 60 95 4% METHOD FLOW-THROUGH PLANTER <br />4 1,609 1,317 292 -1,346 54 70 4% METHOD FLOW-THROUGH PLANTER <br />5 1,785 893 892 -982 40 48 4% METHOD FLOW-THROUGH PLANTER <br />6 1,095 674 421 -716 29 40 4% METHOD FLOW-THROUGH PLANTER <br />DMA LIMITS <br />SELF-TREATED <br />PROPOSED TREATMENT - PERVIOUS PAVEMENT <br />SEE DETAIL A BELOW. <br />PERVIOUS PAVEMENT SIZING CALCULATIONS <br />AREA <br />NO.AREA (SF)IMPERV. (SF)LANDSCAPE <br />(SF) <br />EFFECTIVE <br />IMPERV. AREA <br />(SF) <br />CAPTURE <br />VOLUME <br />REQUIRED (CF) <br />PERVIOUS <br />PAVEMENT AREA <br />(SF) <br />BASE <br />RESERVOIR <br />DEPTH (IN) <br />VOID <br />SPACE <br />CAPTURE <br />VOLUME <br />PROVIDED (CF) <br />SIZING METHOD TREATMENT TYPE <br />1 3,846 3,483 363 3,519 214 1,810 6 35%317 80% CAPTURE PERVIOUS PAVEMENT <br />PROPOSED TREATMENT - FLOW THROUGH PLANTER <br />SEE DETAIL B BELOW. <br />MINIMUM DRAWDOWN TIME KMIN <br />KMIN = D*V/T <br />KMIN = 6IN * 0.35 / 48HR <br />KMIN = 0.04 IN/HR <br />D = BASE RESERVOIR DEPTH (INCHES) <br />V = VOID SPACE <br />T = DRAW-DOWN TIME (HOURS) <br />C5.1 <br />STORMWATER - <br />POST-CONSTRUCTION <br />B TYPICAL FLOW-THROUGH PLANTER SECTION <br />NTS <br />A TYPICAL PERVIOUS PAVEMENT <br />NTS <br />Page 297 of 373