About Us

The North American Society for Trenchless Technology (NASTT) is an association of consulting engineers, educators, contractors, governmental agencies and regulators involved with the application of trenchless technologies. Our Chapter is an affiliate of NASTT and helps to represent the Canadian perspective in the North American trenchless technology marketplace.

The Great Lakes, St. Lawrence & Atlantic Chapter encourages and facilitates the science and practice of trenchless technology for the public benefit. We achieve this by fostering education, and research and acting as a catalyst for technological and process change.

One of the goals of Great Lakes, St. Lawrence & Atlantic Chapter is to provide a forum for discussion and thus our involvement in this event. We are strong believers in sharing knowledge and promoting it through a variety of venues. There are several Great Lakes, St. Lawrence & Atlantic Chapter initiatives which have taken place since its inception in 1995. We are proud of our past initiatives and the value of our Chapter provides to the infrastructure world.

The Great Lakes, St. Lawrence & Atlantic Chapter currently has four active committees:

  • Education and Training
  • Website
  • Student Chapters
  • GLSLA Magazine

What can the Great Lakes, St. Lawrence & Atlantic Chapter do for municipalities interested in applying trenchless technology in a proactive manner? Our Chapter will continue to foster education, research and act as a catalyst for effective technological and process change. We recognize that there is an evolving role for trenchless technologies and in helping infrastructure managers to ensure system performance and reliability.

Board Members 

Following the 2019 Election for GLSLA Board of Directors, GLSLA is pleased to announce that ten (10) Directors have been selected for the ten (10) available positions. The Board of Directors wishes to thank everyone for taking the time to vote! 

Current Board positions:

  • Kevin Bainbridge (Robinson Consultants Inc) - Chair
  • Julia Noble (Pipeflow Contracting Corp) - Vice Chair
  • Derek Potvin (Robinson Consultants Inc.) - Treasurer
  • Mike Near (Liquiforce) - Secretary
  • Bruce Yao (Paragon Systems) - Training Committee with support from Mike Zantingh and Brian Moreau
  • Joe Linseman (Robinson Consultants Inc.) - Magazine Committee
  • Brian Moreau (CBCL Limited) - Website Committee, Atlantic Canada representative
  • Gerald Bauer (Stantec)
  • Dave Crowder (R.V. Anderson)
  • Mike Zantingh (City of Hamilton)

About NASTT Headquarters

The North American Society for Trenchless Technology (NASTT) was founded and incorporated as a non-profit organization in June 1990 in response to the need for an organization dedicated to Trenchless Technology that involved all related disciplines and industries. It is the only organization in North America specifically and exclusively dedicated to the science and practice of Trenchless Technology.

The main purpose of NASTT is to encourage and facilitate the science and practice of Trenchless Technology for the public benefit. This is accomplished by fostering education and research; organizing and conducting symposiums, seminars, exhibitions, and field demonstrations; and acting as a catalyst for technology interchange through international conferences.

NASTT is the North American Affiliate of the International Society for Trenchless Technology (ISTT) and periodically co-sponsors an International NO-DIG with ISTT.

NASTT has over 850 member representatives that include manufacturers and suppliers, contractors, utility owners, municipal representatives, regulatory agencies, consultants, researchers, educators and student members. NASTT conducts an annual NO-DIG conference and exhibition.

Members receive the NASTT Newsletter, a quarterly publication; Trenchless Technology and Underground Construction, monthly magazines; and The Annual Directory of the North American Trenchless Technology Industry and The International Society for Trenchless Technology (ISTT) Yearbook & Directory. NASTT is governed by a Board of Directors consisting of 16 members representing designated geographical areas and disciplines. NASTT's operating structure includes the following committees:

  • Membership Committee
  • Program Committee
  • Education/Public Relations Committee
  • Safety Committee
  • Excavation Committees
    • Directional Drilling Committee
    • Horizontal Earth Boring Committee
    • Microtunneling Committee
    • Pipe Jacking Committee
  • Rehabilitation Committees
    • Cable Committee
    • Gas Committee
    • Sewer Committee
    • Water Committee

Membership on all committees is open to all members.


North American Society for Trenchless Technology
c/o Losi & Ranger, PLLC
7445 Morgan Road, Liverpool, NY 13090 USA
To contact NASTT, please call Molly Margosian at (216) 570-8711 or Michael Willmets at (613) 424-3036.
Web Site: www.nastt.org



What is trenchless technology

A family of non-intrusive construction methods, materials and equipment, used for the installation, replacement or rehabilitation of underground infrastructure. The main goal of these techniques is to minimize disruption to the surrounding environment.

Types of Trenchless Technology

  • Cured-In-Place Pipe (CIPP)
  • Sliplining
  • Spot repair
  • Spray lining
  • New installations
  • Manhole rehabilitation

A Brief History of Trenchless Construction

The extensive use of Trenchless Technology for the installation, replacement or renovation of underground utility services is a relatively recent development. However, the theory and the recorded use of trenchless techniques go back to early Roman times.


More recently, there is recorded use of isolated pipe jacking projects by railroads in the United States as early as 1860. Significant usage in the US began in the 1890s. Possibly the earliest documented use of pipe jacking was found in the 1892 Minutes of the 10th Annual Convention of the New England Roadmasters Association. The minutes refer to "...putting a wrought iron pipe through an earth embankment by means of hydraulic jacks..." Between 1860 and 1890 the Northern Pacific Railroad Company pioneered the use of pipe jacking utilizing cast iron pipe. This same company, by 1930, had jacked reinforced concrete pipe ranging in size from 42in. to 72in. in diameter.

One of the early uses of horizontal boring was by Fred Melsheimer in 1946 in California for installing electric utility cables. Based on technology from the oil drilling industry, his machine was a wet-boring device with a drill rig to rotate hollow-stem drill rods and a cutting head. Water or bentonite slurry was fed to the head under pressure and cuttings flowed back. In some ways, Melsheimer's technique may be considered the first use of trenchless methods for line installation.

A new wave of trenchless development around 1960 was stimulated by the changing needs and economics of the utilities and of society. In the 1960s and 1970s a National effort was made to provide all un-served communities with utilities. By the 1980s, higher standards of living and increasing industrial and commercial demands resulted in the reinforcement, replacement and rehabilitation of many existing systems. Competition for limited underground space, compounded by the great increase in automobile traffic and the need to minimize traffic disruption, logically focused on Trenchless Technologies a possible solution.

The development of new processes for the rehabilitation of existing pipelines to extend their operational life began in the 1970s. Slip lining, the pulling or pushing of a smaller pipe inside the old one, had been used for some time. The new methods involved (a) the use of bursting devices to remove the old pipe and simultaneously replace it with a new one, and (b) forming a lining "in place" by inserting a resin-impregnated sock into the existing pipe and subsequently curing it to provide a structural material.

Several methods for spot repair of local defects, such as cracking or joint failure, have been developed. Systems are available for remote control resin injection, as well as grouting with urethane and other materials, to seal local defects.

Research sponsored by the Electric Power Research Institute (EPRI) and the Gas Research Institute (GRI) in the mid 1980s resulted in the development of monitoring equipment and a number of guided and steerable methods for the installation or replacement of pressure pipe and cable.

Microtunneling, on of the newer applications of trenchless construction, was developed in Japan in 1973.
By 1980 the technology had spread to the rest of the world, and to Germany in particular, where continued development took place.  By the 1980s, pipe jacking and microtunneling technology and experiences enabled the user to install permanent, high-quality pipe by trenchless methods as efficiently and often more efficiently than could be accomplished with open-trench methods.

Trenchless construction provides an opportunity to help solve our huge, complex underground infrastructure problems economically, safely and with a minimum of inconvenience to the public and damage to the environment. On-going research to further develop and refine high-tech trenchless equipment and processes will ensure that our industry continues to represent the cutting edge of construction technology.

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