The rail line between Canberra & Cooma was closed to passenger trains in September 1988 after the bridge over Numeralla Creek was deemed unsafe, freight services along this line ceased in May 1989.
The 49km section between Queanbeyan and Michelago was reopened in April 1993 for heritage tourist operation however this was suspended in the beginning of 2007 due to storm damage.
The rail had stops in Royalla, Williamsdale, Michelago, Colinton, Bredbo, Billilingra, Chakola, Bunyan and Cooma, with bridges crossing Ingalara Creek, Bredbo & Numeralla Rivers and a tunnel under the hill at Colinton.
The bridge over Colyers Creek is 20ft above the water and has 5 x 26ft openings and covers 2 spans.
There is parking right near this cache and you can near park here to access the start of the 10km return walk to claim the “The Forgotten Series – Forgotten Tunnel” cache.
You will need to bring your own pen to be able to claim this find.