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<br />Lesson 3 <br /> <br />Culvert Design - Participant Workbook <br /> <br />Culvert inlets are available in a variety of configurations and may be <br />prefabricated or constructed in place. Commonly used inlet configurations <br />include: <br /> <br />A. <br /> <br />1. projecting culvert barrels, <br />2. cast-in-place concrete headwalls, <br />3. precast or prefabricated end sections, and <br />4. culvert ends mitered to conform to the fill slope. <br /> <br />B. Inlet configuration affects energy loss and hence culvert performance. <br /> <br />ENTRANCE LOSS COEFFICIENTS <br />INLET ENTRANCE LOSS <br />CONFIGURATION COEFFICIENT <br />Thin End-Projecting Barrel 0.' <br />Mitered End 0.7 <br />Headwall 0.. <br />Precast End Section 0.' <br />Groove-end, Beveled or 0.2 <br />Imnroved Inlet <br /> <br />3.4 Inlet Loss Coefficients <br /> <br /> <br />3.6 End Mitered to Slope <br /> <br /> <br />3.5 Projecting Barrel <br /> <br /> <br />3.7 Cast-In-Place Headwall <br /> <br />3-4 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />