The Tunnel Congress was organized by the UCA of SME (Underground Construction Association, Division of Society for Mining. Metallurgy and Exploration Inc.) in conjunction with the ITA. It was captioned “Uniting our Industry”. 57 of the 73 ITA member nations were present in San Francisco. The proportion of countries attending stood at 78 % – the same figure as last year in Croatia (please see infobox on page 25).
1 2016 World Tunnel Congress
The main congress programme was devoted to 18 main topics:
1. Safety in Design and Construction
2. Sequential Excavation Method (SEM) and Caverns