Freeboard 27
Freeboard 27 : The vertical distance between a stated reservoir elevation and the crest of the dam. "Net freeboard", "dry freeboard", "flood freeboard", or "residual freeboard" are expressions for the vertical distance between the estimated maximum water elevation and the crest of the dam. "Gross freeboard" or "total freeboard" expressions for the vertical distance between the maximum normal water elevation and the crest of the dam