RedactedNarrative: Vessel 1 was north of the Blackburn Bridge while traveling south in the ICW.  The operator of Vessel 1 saw the water level mark on the bridge fender at 8' and believed was able to clear the bridge.  The water level was higher than what the operator observed and Vessel 1 struck the bridge with the GPS antenna located on top of the vessel tower causing the crash.  There was no damage caused to the bridge.