I only recently came to ride this route although had been told about it as far back as 2010. The road runs between Inverell and Bingara via the Copeton dam. It is well surveyed and as of writing good surface. You can enjoy the ride as well as views of the dam and a high viewpoint overlooking Bingarra if you don’t mind small detour just out of town.
Very quiet road yet enjoyable. One of the few on my recent tour in Australia where I did not need to be looking at my speedometer all the time.