using the link I draw your attention to the two bridges.  What is the background to these as they appear to be both rail bridges but with only one connected to the network?

The western bridge is the original narrow gauge bridge. It has been there from the late 1800's. It was in use through to when the Broken Hill - Port Pirie line was standardised. When the line was standardised, a new bridge was built for the standard gauge track.

In the early 1970's, the new bridge was damaged in a flood and a train was derailed. Track was temporarily (re)laid across the old bridge. The old bridge acted as a diversion until the new bridge was re-built.

I do not believe that the old bridge has been re-used since.

I was at the 'brook last September and had a good look at the old bridge. It is a lovely bridge with beautiful steel work. Seems to be in good condition but I doubt that it would be suitable for today's tonnages.

Cheers

Dan

UPDATE:
The standard gauge bridge was destroyed in a flood and consequent derailment in October 1975.

Cheers,
Dan