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<br />these factors in the bridge design process in influenced by, among other <br /> <br />things, the importance of the bridge and by the degree of cultural development <br /> <br />of the flood plain. The bridge, geomorphic, and flow factors that should be <br /> <br />considered in bridge design or maintenance include: <br /> <br />Bridge factors <br /> <br />l. Length <br />2. Clearance above waterway <br />3. Pier placement, shape, footings <br />4. Abutments, style, location, <br /> footings <br />5. Approach, embankment <br />6. Proximity of other bridges <br /> <br />Geomorphic and flow factors <br /> <br />l. Water level or stage <br />2. Discharge <br />3. Flood frequency (recurrence <br /> interval) <br />4. Duration of flooding <br />5. Water velocity <br />6. Floating debris <br />7. Source of flow (streamflow at site <br /> <br />represents either natural <br /> <br />conditions, effect of artificial <br /> <br />inflow or diversion, or regulated <br /> <br />flow) <br />6. Channel geometry <br /> <br />9. Channel slope <br /> <br />10. Presence of existing features <br /> <br />11. Suspended sediment and bed <br /> <br />material <br /> <br />12. Channel alignment <br />