John Braybrooke is a Senior Consulting Engineering Geologist with over 50 years of post-graduate experience in all facets of engineering geology, ranging from house sites to large scale infrastructure projects.
John has worked in all states of Australia as well as Papua New Guinea, New Zealand, Indonesia, Malaysia, Philippines and Western Samoa.
John's areas of expertise include civil and mining underground structures, particularly tunnels, declines, drifts and shafts, having been involved with over 250 underground projects at pre-feasibility, feasibility, design, construction or post construction including latent condition claims for both contractors and owners. This experience includes having worked on most tunnels in Sydney, constructed since and including the Eastern Suburbs Railway in the 1970's and in various roles.
He also has extensive experience with dams, ranging from prefeasibility to post construction and from mine dams to a 150m high earth and rock, hydro-electric dam in Malaysia. This experience includes designing and supervising grouting programs. He was the resident engineering geologist in the 1970's on the Shoalhaven water transfer and pump-storage scheme, a mini Snowy Hydro Scheme with 4 dams, 2 tunnels, 3 power/pump stations, canals and pipelines. More recently John supervised and was intimately involved with the field work for the 3 year study of the infrastructure for the Frieda River Gold/Copper mine in the Sepik District of PNG and for the Ramu 2 Hydro-electric Scheme, also in PNG
In addition John has been involved with deep excavations in the city, particularly Sydney, starting with World Square where near surface high horizontal stresses were identified in Sydney for the first time, to Barangaroo Central, particularly involved with shoring design and construction and excavatability issues, including productivity.
John's expertise extends to slope stability issues ranging from house sites, to the Thredbo debris flow to major landslides at Ok Tedi, PNG.