I was talking to John Hamill from the MRSI he has been trying to find out what's happening. Its still with Dublin tourism but they are just sitting on it. 1.6 million was left to restore the casino and the renovation of the railway, on the basis it goes back to Malahide.
Looks like it going to be left mothballed. Very sad
Here is a wiring diagram http://www.micromark.com/html_pages/instructions/82611i/82611microswitches.htm
Use the normally open contact for the bus, when the bridge is down the switch is open circuit, bridge up circuit closed.