RedactedNarrative: V1 WHICH WAS A SAILING VESSEL UNDER POWER, WAS TRAVELING EAST IN THE MARKED CHANNEL IN THE AREA KNOWN AS JOHNS PASS IN MADERIA BEACH/TREASURE ISLAND.  THE OPERATOR OF THE SAILING VESSEL DID NOT WAIT FOR THE JOHNS PASS BRIDGE TO OPEN AND THE OPERATOR DID NOT VERIFY THAT HE HAD ENOUGH CLEARANCE BETWEEN  THE MAST OF V1 AND THE BRIDGE BEFORE ATTEMPTING TO PASS UNDER.  THE MAST OF V1 COLLIDED WITH THE CENTER SPAN OF THE DRAW BRIDGE.  THE SALING VESSEL MAST SNAPPEN IN HALF AS A RESULT OF THE COLLISION; APPROX 5000 DOLLARS WORTH OF DAMAGE.  THE BRIDGE SUSTAINED MINOR COSMETIC DAMAGE; APPROXIMATELY 300 DOLLARS.  THE INTEGRITY OF THE BRIDGE IS NOT BELIEVED TO BE COMPROMISED AT THIS TIME.