Came through last Autumn followed by catamaran with 62ft mast who cleared it. Was able to provide read out from base of bridge which gives clearance at the time. Level affected by wind and pressure more than anything - I understand.
As a matter of interest we observed a large ketch with approx 75ft mast come the whole way down the ICW. He got through fixed bridges by inclining his big boat. He acheived this by hoisting 2 waterbags up a halyard and swinging them out when necessary.
I think you would make it - goodluck. (I admit to 52ft 6in, I confess)