There is some info about the area on the forum, and if you search for Cowra Creek and select view results as posts, there is some interesting reading:
"There is a fairly broad line of gold bearing reefs and gravels which extend from Cowra Creek north of Cooma, through to the Big Baja, Little Badja and Numeralla Rivers. This band then follows the ranges south the Nimitabel and becomes quite rich again the closer you get to Bombala / Bibbenluke.
The area between here and Delegate has numerous gold bearing creeks and can surprise many if you put in some ground work and research. Most who fossick theses areas keep their information under their belts, as they haven't had the hammering of the more well known areas, and they like to keep it that way.
You will never find someone putting an "X" on the ground here, but the gold is certainly there for those who seek.
Wal."
"If you want a testing area within an hours drive of Canberra I'd take a look at the Cowarra Gold Field on Cowra Creek just east of Bredbo or the Big Badja Field just past Numeralla.
Ive got small nuggets from both in the past plus there's some good relics in the area as well,(especially Cowra Creek area.)
Best of luck out there mate.
Cheers Wal."
Funnily enough, I have a connection to Cowra Creek mine as well. My grandfather on the other side was a miner there and mum was a little kid on the field in the late 1930's.