Elevation of Culvert Crown at Datum Point

The elevation of the culvert crown at the datum point is not used directly in the scour computations. However, the elevation of the water surface at the datum point cannot exceed the elevation of the culvert crown. When the water surface is at the crown, use the perimeter of the culvert to define the waterway areas for the channel and overbank sections.

Click here to see definition sketch of the culvert crown elevation