World's Largest Online Trenchless Library Technical Papers 1991-Present

Members receive complimentary access to over 2,000 technical papers presented and published at past No-Dig Shows. You can search entering a year, keywords or a topic or a combination of all three.

2021 papers are now available! Click here to visit our library to search for individual papers from 1991 to the present. 

Download the entire 2021 Conference Proceedings here.

Conditions of Use

All NASTT Trenchless Library technical papers, including (but not limited to) written material, images, photographs and code are protected under international copyright and trademark laws. No individual or corporation may copy, reproduce, modify, republish, transmit or distribute any technical paper, in whole or in part, from this website without express written permission from NASTT.  Access to the NASTT Trenchless Library is permitted for individual research, private study, education, review, and non-commercial use only.  Extensive duplication or unlawful copy of the NASTT Trenchless Library, in whole or in part, is strictly prohibited and constitutes an infringe of copyright.  NASTT reserves the right to limit access and usage for both members and non-members of the society.

Disclaimer

The technical papers available from the North American Society for Trenchless Technology (NASTT) were all presented at various NASTT No-Dig Shows as part of our educational outreach program.  All said technical papers have been subjected to the society’s annual Program Committee peer review process.  The information contained therein is offered in good faith.  NASTT and its agents accept no responsibility for any errors or omissions.  Readers must conduct their own inquiries to satisfy themselves as to the suitability of the information to their specific application.

Nothing contained in the technical papers is to be considered as the rendering of engineering or technical advice or direction for specific projects or situations, and readers are responsible for obtaining such advice from their own professionals.  The technical papers are intended for educational and information purposes only.

No reference made in the technical paper library to any specific product or methodology constitutes an endorsement, recommendation or warranty thereof by NASTT or its agents.