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American Underground-Construction Association (AUA) (Rate) (Report)

An organization of professionals involved in the planning, design, development, construction and use of underground facilities. The goals of the Association are to promote the development and use of underground facilities; to create greater understanding of the potential and benefit of underground use; to encourage appropriate policies and planning for successful underground use; to promote effective use of underground construction technology; and to advocate for the underground construction industry.

 
International Tunnelling Association (ITA) (Rate) (Report)

Organization dedicated to the improved use of underground space.