As I was down that way today, I went to have a look.
The loop and siding at Tarago
are intact. No idea what the two wagons represent. I 'think' that Woodlawn used to load here in its previous life.https://flic.kr/p/JTro2aCrisps Creek
, just over 1km towards Canberra is where the Garbage train is unloaded. Main Line, Loop, and another siding with a large hardstand area in the middle. The two locos were shut down, not attached to the wagons behind, all quiet, though some people around the gate area.https://flic.kr/p/JTroaX
Woodlawn is about 10km west, and the terrain between would make building a siding/branch rather expensive. The Ore reserves in the mine and its expected lifespan would have a bearing also.
I gather that the Goulburn site is in the area near the Wagon Workshops.