Helpful Links
Oregon Columbian Chapter of Associated General Contractors (AGC)
The Associated General Contractors, Oregon-Columbia Chapter, is a full-service construction trade association serving Oregon and Southwest Washington since 1920. AGC provides services to open shop and union contractors, specialty contractors, and professional and industry associates.
Deep Foundation Institute (DFI)
DFI can best be described as being a technical association of firms and individuals in the deep foundations and related industry. DFI covers the gamut of deep foundation construction and earth retention systems.
Pile Driving Contractors Assn. (PDCA) 
The PDCA is an organization of pile driving contractors that advocates the increased use of driven piles for deep foundations and earth retention systems.
The International Association of Foundation Drilling
(ADSC-IAFD) The International Association of Foundation Drilling (ADSC-IAFD) is a professional, international, not-for-profit [501(c)(6)] trade association representing the anchored earth retention, drilled shaft, micropile, and other heavy civil construction/design industries.
More links will be posted soon. Please check back.