Residual freeboard definition

Residual freeboard means the vertical distance between the highest water surface elevation during the inflow design flood and the lowest point at the top of the dam.
Residual freeboard means the vertical dimension between the maximum water surface elevation at the peak of the inflow design flood and the lowest point on the crest of the dam at which the dam would be first overtopped.
Residual freeboard. (fr) means the minimum distance between the damaged ro-ro deck and the final waterline at the place of damage, not taking into account the effect of water accumulated on the damaged ro-ro deck.