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<br />" <br /> <br /> <br />t <br />~ <br />~ <br />~ <br />. <br />t <br />, <br />" <br />. <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />t <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />~ <br />t <br />~ <br />~ <br />t <br /> <br /> <br /> <br /> <br />PLAN <br /> <br />Figure III-6-Culvert with Inlet sump. <br /> <br />is paved, but for small depressions, an <br />unpaved excavation may be adequate. <br /> <br />at the face to the throat invert. Tapered <br />inlets will be discussed further in chapter <br />IV. <br /> <br />When a culvert is depressed below the <br />stream bed at the inlet, the depression <br />is called the FALL. For culverts without <br />tapered inlets, the FALL is defined as <br />the depth from the natural stream bed at <br />the face to the inlet invert. For culverts <br />with tapered inlets, the FALL is defined <br />as the depth from the natural stream bed <br /> <br />b. Outlet Control <br /> <br />I) Examples of Outlet Control. <br />Figure III-7 illustrates various outlet <br />control flow conditions. In all cases, <br />the control section is at the outlet end <br />of the culvert or further downstream. <br /> <br />31 <br /> <br />, <br />~ <br />" <br />f <br />