Here is hopefully a clearer diagram:
click the image...
The ABC TV1 News of 01 Oct 2013 had a report about the new Moorebank Terminal impacting on:
* The Art Museum in the old Casula PowerHouse
* wildlife in the river which may not be able any longer to get from the South Side of the new rail bridges to the North side
* 2000m long trains.
In the map, Casula station is more or less right under the words "Casula" on the map.
Presumably there is access via footbridge from all platforms over the SSFL to the museum. What about road access and museum parking?
That said, except for the mainline triangle, and bridges over the river, everything else is on the eastern side of the river.
The unloading sidings are all straight, which suits the travelling overhead container cranes, but other tracks are tightly curved to fit in the available space.