The Western Chapter (WESTT)
of the North American Society for Trenchless Technology (NASTT

Who We Are

NASTT is the North American Society for Trenchless Technology, an engineering society of individuals, public organizations and private companies dedicated to the promotion and use of trenchless construction practices and technologies. NASTT was founded and incorporated as a non-profit organization in June 1990.

The Western Chapter of NASTT (WESTT) promotes the NASTT mission within our western region of Arizona, California, Hawaii, Nevada, and New Mexico. Regional Chapters offer members the opportunity to network with industry colleagues as well as attend educational events and share solutions for the betterment of our society.

Our mission is
 to advance the science and practice of Trenchless Technology for public benefit; to promote and conduct education, training, study and research in said science and practice for the public benefit; and to make available information thereof to all interested and concerned parties.

Officers and Board Members

  • Brian Avon, Chair
  • Kate Wallin, Vice Chair
  • Tim Taylor, Treasurer
  • Greg Watanabe, Secretary
  • Lisa Arroyo, Past Chair
  • Michelle Beason
  • Jennifer Glynn
  • Jacquie Jaques
  • Rachel Martin
  • Sasha Mestetsky
  • Devin Nakayama

Contact us today!


The WESTT Chapter Meeting is scheduled for January 20, 2022 from 1:00 to 2:30 PST and will be hosted on MS Teams. All NASTT members located in the Western Region (Arizona, California, Hawaii, Nevada, and New Mexico) are encouraged to attend.  The meeting will provide updates on board activities and to discuss how to best serve our chapter in the future. Topics to be covered include: future chapter meetings, planning for our 2022 in-person conference, board elections, outreach to under-represented regions, student chapter engagement, and our financial status report.  Register for the meeting by emailing Brian Avon at BAvon@Carollo.com.  We hope to see you there!


When you join the North American Society for Trenchless Technology (NASTT), you’ll belong to the largest community of trenchless professionals in the USA and Canada committed to promoting better and more responsible ways to manage underground infrastructure and advance trenchless technology for the benefit of the public and the natural environment. 

Join as a college student or individual professional or get group savings as an organization with a corporate or government/education/utility membership. Chapter membership is included with NASTT membership.