Trenchless Design Services

Brierley Associates is an internationally recognized authority in the selection, design, construction management, forensic analysis of trenchless technologies.  Our range of engineering and consulting services include new installations and pipe rehabilitation. The benefits of trenchless technologies have been increasingly acknowledged as an economical and environmentally friendly alternative to conventional cut and cover construction. Aside from reducing disruption and damage to: developed urban locales, environmentally sensitive areas,waterways and surface transportation corridors and airports; trenchless methods can dramatically reduce the carbon foot print of  sewer, water and utility projects.

Design of a successful trenchless project is much more than drawing a line on a plan. The process commonly requires a detailed consideration of client needs, contractual preferences, risk allocation, third party requirements, pipe design criteria, surface terrain and alignment specific subsurface  conditions.  In each case,we draw upon our collective national and international “Creating Space Underground” experience to understand those challenges and deliver a successful project.

Brierley Associates offers extensive design, engineering, forensic and construction experience with all trenchless methods including…

  • Horizontal Directional Drilling (HDD)
  • Pilot Tube Guided Auger Boring
  • Direct Pipe MethodTM
  • Microtunneling
  • Auger Boring
  • Pipe Jacking and Ramming
  • Pipe Bursting
  • Pipe Rehabilitation

You are invited to contact our trenchless specialists to learn more about how Brierley Associates can help you with the planning, design, and construction management of your next project.


Nick Strater, PG
Trenchless  Design Leader
167 South River Road #8
Bedford, NH 03110
Cell: 603.918.0606

Brian Dorwart, PE, PG
167 South River Road #8
Bedford, NH 03110
Cell: 617.510.8090

Becky Brock, PE
990 South Broadway
Suite 222
Denver, CO 80209
303.703.1405

Tom Pullen
8617 West Point Douglas Road S, Suite 240
Cottage Grove, MN 55016
Cell: 607.244.3010

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