TUNNELLING ASSOCIATION OF CANADA                                                         

The  Tunnelling Association of Canada (TAC) brings together Canadian, North American and International individuals and firms to promote and advance Canadian tunnelling and underground excavation technologies and to represent the interests  of the tunnelling  and underground excavation community in matters of technical and public concern.

INTERNATIONAL TUNNELLING AND UNDERGROUND SPACE ASSOCIATION (ITA)

The International Tunnelling and Underground Space Association (ITA) is the leading international organisation promoting the use of tunnels and underground space through knowledge sharing and application of technology. ITA  represents  all aspects  of tunnel  and underground space planning, design, and construction.

The organisation holds its General Assembly Meeting and the World Tunnel Congress (WTC) in a different Member Nation, each year. ITA had 1974 when founded 14 Member Nations and had since grown steadily and includes today 79 nations and 260  Corporate or Individual Affiliate Members. An impressive number and shows the importance of the industry.