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DRAINAGE CRITERIA MANUAL (V. 1) <br />60 <br />n ~ <br />v <br />0 <br />2c <br />00 <br />MAJOR DRAINAGE <br /> <br /> <br /> $ <br />~ ~~ <br />~ <br /> J S~p~~Q~ 4ye t1 <br /> M <br />T'~ PE I I <br /> TYPE t- <br /> <br /> <br />.2 .4 Y ~D .6 .8 1.0 <br />t <br />Use Do instead of D whenever flow rs supercritical in the barrel. <br />~+~Use Type L fora distance of 3D downstream. <br />FIGURE MD-21 <br />Riprap Erosion Protection at Circular Conduit Outlet Valid for Q/DZS <_ 6.0 <br />06/2001 MD-109 <br />Urban Drainage and Flood Control District <br />