Brierley Associates is a privately-held national tunnel, trenchless, geo-structural and geotechnical design firm with offices strategically located across the United States. With over 80 underground  engineers and geologists, Brierley Associates delivers recognizable value to our clients by providing cost effective and constructable solutions for underground and heavy civil infrastructure projects.

Our team 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’ nationwide and international underground project knowledge-base is key to anticipating ground behavior and helping our clients with design and construction of successful projects, which is the cornerstone of Brierley’s business vision to…“Create Space Underground”.

Press Room

Checkout out our Press Room for past issues of our In Depth Newsletter and published papers and articles.

Northeast Boundary Tunnel – Notice to Proceed

After a successful multi-month process Brierley Associates and our client Salini Impregilo/S.A.Healy JV were issued Notice-to-Proceed for the $580-million Design/Build Northeast Boundary Tunnel (NEBT) project in Washington, D.C. The NEBT is the largest component of DC Water’s Clean Rivers Project. The soft ground tunnel will be 23-feet

Gamal to be at NAAMLP 39th Annual Conference Lexington, KY

The National Association of Abandoned Mine Land Programs 39th Annual Conference will run from Sunday evening September 24th, through Wednesday the 27th in Lexington KY. Registered as a nonprofit corporation in 1995, the mission of NAAMLP is: To provide a forum to address current issues, discuss common problems, and share new technologies

Dam Safety 2017 in San Antonio-September 10-14

Next week the Association of State Dam Safety Officials will convene in San Antonio, TX, September 10-14.  Dam Safety 2017 is the leading conference in the United States dedicated to dam and levee safety engineering and technology transfer and will once again bring together nearly 1,000 individuals

Brierley Associates at AEG Annual Meeting-September 10-16, 2017

 AEG Annual Conference Update Becky Brock will be presenting during Technical Session #10 Thursday September 14 Challenges of Inspecting Unlined Rock Tunnels Based on the New National Tunnel Inspection Standards In 2015, Congress mandated the inspection of all vehicular tunnels in the country on a regular basis.