An embankment is traversed by a 6 ft X 6 ft concrete box culvert 100 ft long as shown in Figure P16.12. The upstream invert is at an elevation of 8 ft and the downstream invert is 4 ft. If the depth...

An embankment is traversed by a 6 ft X 6 ft concrete box culvert 100 ft long as shown in Figure P16.12. The upstream invert is at an elevation of 8 ft and the downstream invert is 4 ft. If the depth at the upstream end of the culvert is 8 ft, what is the flow through the culvert? Assume the culvert is not in tail water control.