LinksOrganizations / Resources / Publications:North American Society for Trenchless Technology (NASTT) American Society of Civil Engineers Trenchless Technology Center (TTC) Louisiana Tech University National Utility Contractors Association (NUCA) Trenchless Information Center Trenchless Technology Magazine Microtunneling Equipment: Akkerman Herrenknecht Microtunneling, Inc. Rasa Pipe: Hobas Permalok Meyer-Polycrete U S Composite Pipe |