I know this is a old thread but...
1- my GARMIN
, ActiveCaptain and NavNet
charts do not show this bridge clearance.
2-Explorer Charts show both spans at 21meters...however the East span is about 10' lower than the west span! So, beware. Explorer Charts are the best.
If you can't make it under, then A: come in thru "the narrows" between Salt
Cay and east end of PI in good light or B: go to Chub Rock then south to Porgee Rock on the recommended route(straight shot, 9' at low water). Both lights are reliable and your radar
will pick up the gaps in the rocks.