[finnman69]

well one support pylon is still standing, cant see the pylons ont he toher side.

[Mr Ramsbotham]

well one support pylon is still standing, cant see the pylons ont he toher side.

Based on that photo it appears that the main supports gave way, fell down, and tore loose from the main span. When that happened, there was essentially nothing to support the main span, and it fell into the water.