 The jetties are approximately long and apart.Recurring storm damage required rebuilding the jetties in 1911, 1927, 1932, 1939, 1950, 1957, 1963, 1971, 1988 and 1995.Entrance currents are strong, ranging from 2.0 knots average maximum ebb and 1.6 knots average maximum flood; but peak rates can be nearly twice as high.