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NASTT Student Chapter at Virginia Tech

NASTT is an engineering society of individuals, public organizations and private companies with strong beliefs in the practical, social and environmental benefits of trenchless technology. Founded in 1990, NASTT represents 1,500 members throughout the United States and Canada who all promote better and more responsible ways to manage our underground infrastructure.

NASTT's mission is to advance trenchless technology and to promote its benefits for the public and the natural evironment by increasing awareness and knowledge through technical information dissemination; research and development; education and training. NASTT strives to provide a representative voice for all sectors of the trenchless technology industry.


What is Trenchless Technology?

Trenchless technology is a progressive civil engineering process for the installation, replacement or renewal of underground utilities with no or minimal excavation and surface disruption. These innovative methods have been utilized successfully for all underground utilities including water mains, storm and sanitary sewers, gas main, electrical and fiber optics conduits. When employed in urban areas, substantial benefits are realized including dramatically reduced disruption to vehicular and pedestrian traffic, to business activities, to residential areas, and to environmentally sensitive areas. Trenchless technologies are the premier crossing options for major roads, railways, waterways as well as natural or manmade structures. In most cases, trenchless techniques will demonstration significant cost saving benefits for municipalities and utilities over traditional open trench methods. Recent advancements in robotics have allowed trenchless technologies to provide pipe condition diagnostics never before available permitting utility owners to more accurately identify infrastructure priorities.


Why Trenchless?

Trenchless Technology involves the installation, replacement or renewal of underground utilities with minimum excavation and surface disruption. Several construction techniques and methods qualify as trenchless. See Trenchless Guidelines for details. Trenchless technologies are and have been used successfully for all underground utilities from, water, sewer, gas, and industrial pipelines to electrical conduit and fiber optics.

Trenchless Technologies are a particularly attractive construction options in urbanized area with heavy vehicular and pedestrian traffic and numerous existing underground utilities. Trenchless is an attractive option for crossing roadways, and other transportation corridors, and rivers and waterways. Trenchless also can be used to install, rehab or replace utilities located in environmentally sensitive areas and locations where surface access may be restricted due to the existence of structures or vegetation.

Often, trenchless techniques are the only viable construction option. Trenchless techniques are also often the least costly option as well as the least disruptive.


Every day thousands of kilometres of roads are blocked by road works, millions of litres of fuel are wasted, air is polluted, accidents occur, buildings are damaged and people suffer. But wait just a second. Look again. Did you notice those covers in the road? If there are access points to the underground networks why not use them?

Here is same repair being undertaken using Trenchless Technology.


Past Activities

NASTT 20th No-Dig Show

Our VT fellows participated in the NASTT 20th No-Dig Show event at Gaylord National Resort & Convention Center, Marryland on March 27-31, 2011.

Kristi Steiner and Alison St. Clair were awarded the NASTT Michael E. Argent Memorial Scholarship. from Left to Right: Alison St. Clair, Prof. Sunil Sinha, and Kristi Steiner.