Rock Bolting Development Site, Heritage engineering site in Cooma, Australia.

The Rock Bolting Development Site is a former experiment site on a rock face in Lambie Gorge at Cooma, where drilled holes and remnant rock bolts remain visible. Snowy Mountains Hydro-Electric Authority personnel used it from 1956 to 1962 to test patterned rock bolting, with pull-out tests proving an anchorage as strong as the bolt itself.

Engineers from the Snowy Mountains Hydro-Electric Authority conducted systematic tests between 1956 and 1962 on this rock face to develop bolting techniques for tunnel construction. This work was critical to improving safety standards for underground excavation projects.

Engineers Australia declared the site a National Engineering Heritage Landmark on 18 October 2009, unveiling a plaque and interpretive sign. The event coincided with the 60th anniversary of the Snowy Mountains Scheme. The landmark is the highest heritage recognition the organisation awards.

The site is accessible via pathways from the Cooma Agricultural Society Showgrounds on Sharp Street and offers direct views of the rock face with historical drill holes. It is best visited during daylight and sturdy footwear is recommended, as the route follows the creek bed.

The non-shrinking grout formula developed by the Snowy Mountains Hydro-Electric Authority's Scientific Services Laboratories compensated exactly for the shrinkage of normal grout, allowing bolts to transfer load along their whole length and protecting them from corrosion. This innovation was as important as the bolt itself.