www.auca.org
The American Underground Construction Association
Includes news from the US tunnelling industry, member information, and a project of the month, featuring construction challenges and approaches taken.

www.armarocks.org
American Rock Mechanics Association
Features include on-line purchase of rock mechanics publications, links to related organizations and associations, and a job posting service.

www.cgs.ca
Canadian Geotechnical Society
Includes CGS News (division and committee reports), links to geotechnical sites and universities, conference information and links, and a job posting and job bulletin board service.

www.nastt.org
North American Society for Trenchless Technology
Contains membership and committee information, on-line sales of trenchless publications, and a glossary of trenchless terminology.