Unless I am mistaken, I believe all fixed bridges on the Intercoastal are a minimum of 65'' clearance at Mean High Water. I remember one trip that a chart I was using said (in error) clearance for a particular bridge was 62'' it was nail biting time since my mast height is 64 1/2'' and I just happened to look at the chart as I was passing under this bridge and we were coming into high tide. I believe there might be one bridge in the Miami, Fla. area which is below the 65''clearance. You may have the same old chart that I had with the error on it. Also, most of the bridges have a height clearance marker on the rip rap which indicates the current clearance. You should have no problem with your mast height. If any question just wait until low water. Good Luck! It is a fun trip-of course depending on your draft and how often you run aground.