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'.COLORADO LEGACY LAND <br /> ATTACHMENT 1.URBAN DRAINAGE AND FLOOD CONTROL DISTRICT DRAINAGE <br /> CRITERIA MANUAL FIGURE MD-21 <br /> DRAINAGE CRITERIA MANUAL(V.1) MAJOR DRAINAGE <br /> 60— <br /> 10.q <br /> �7,7 n <br /> 20 <br /> TYPE t <br /> I4�T�i <br /> OD .2 0.11 A Y /D .6 .8 1.0 <br /> i t <br /> 3_5 _OM <br /> Use Do instead of D whenever flow is supercritical in the barrel. <br /> **Use Type L for a distance of 3D downstream. <br /> (7..7 <br /> Figure MD-21—Riprap Erosion Protection at Circular Conduit Outlet Valid for QID25 5 6.0�*r:5`Z•RS <br /> 3,5 <br /> o <br /> yt <br /> Co...Se/'✓�U <br /> Rev.0412008 MD-107 <br /> Urban Drainage and Flood Control District <br /> PAGE 5 OF 7 <br />