Brierley Associates is a privately held national tunnel, trenchless, geotechnical, and geostructural design firm with offices strategically located in nine states. With over 55 underground engineers and geologists, Brierley Associates has a long history of delivering recognizable value to our clients and projects by providing cost effective and constructible solutions.

Brierley Associates understands that planning, design, and construction of subsurface projects is a complex mixture of client needs, contractual preferences, risk allocation, third party requirements, design criteria, and subsurface conditions.

Brierley Associates is experienced in all aspects of tunnel and trenchless design and construction; including feasibility and risk assessment, geologic and geotechnical site characterization, contractor procurement, and construction management.

Brierley Associates nationwide and international underground project knowledgebase and is key to anticipating behavior and helping our clients with design and construction of successful projects.

All of us at Brierley Associates, share a common business vision; one that is dedicated to the service of our clients, as we
“Create Space Underground”.


Tunnel Design

Brierley Associates is organized to provide seamless planning,
design, construction management and forensic services for underground space projects.

Trenchless Design

Trenchless Design

Brierley Associates is a recognized national authority in the application, design, management, forensic analysis and implementation of trenchless technologies for underground infrastructure rehabilitation and new installation.

Geostructural Design

Geostructural Design

Brierley Associates provides geotechnical engineering services for heavy civil projects with an understanding of ground conditions through rigorous investigation, accurate description of subsurface and surface characteristics and analysis and judgment based on experience.

Geotechnical Design

Geotechnical Design

Brierley Associates can design a wide array of support of excavation systems. We have the skill sets needed to evaluate subsurface conditions at your project site and develop constructible and cost effective support systems.

Dam Engineering Consultants

Dam Engineering

Brierley Associates has over 100 years of experience in the evaluation and construction of improvements to existing earthen, rockfill and gravity dams, locks and levees across the United States as well as Canada.

Construction Dispute Resolution

Dispute Resolution

Brierley Associates provides forensic engineering services requiring expertise in geotechnical engineering, heavy construction, tunneling and trenchless construction.

Recent Project Liberty University Box Tunnel

Liberty University Twin Box Tunnels Through Railroad Embankment

ENR Mid-Atlantic Region “BEST SMALL PROJECT” 2014Best-Projects-2014_150x130_BEST-WINNER Award Button [8-11-14] (1)

ENR Mid-Atlantic Region “BEST PROJECT SAFETY AWARD” 2014

ACEC Virginia Engineering Excellence “GRAND AWARD” winner – November 2014

The Liberty University Box Tunnel project consists of two, two-lane, 130-ft long vehicular tunnels installed by box-tunnel jacking methods beneath three Norfolk Southern railway lines at the southern end of their railway yard in Lynchburg, VA. Approximately 30 trains, including two AMTRAK trains, pass through the yard each day.

Read more…

Office Locations







New Hampshire

New York


Mailing List

Join our mailing list.

Connect With Us