Brierley Associates is a privately-held national tunnel, trenchless, geotechnical, and geo-structural design firm with offices strategically located across the United States. With over 60 underground  engineers and geologists, Brierley Associates has a long history of delivering 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.

The nationwide and international underground project knowledgebase of Brierley Associates 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.

Brierley Associates at– NASTT 2015 Denver

2015 No-Dig Show Papers by Brierley Associates Brierley Associates presented the following at the 2015 No-Dig Show in Denver. Please visit our Press Room to read these papers. Grout Engineering for Directional Drilled Bores         Brian Dorwart – Presenter Grouting of horizontally directional drilled

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Award News – Twin Vehicular Box Tunnels, Liberty University

Brierley Associates unique approach to box tunnel design and construction continues to receive recognition. ENR Mid-Atlantic Region held its annual Best Project Awards ceremony on December 12, 2014 at the Baltimore Hyatt Regency. Each award winner was recognized during a multi-media slide show and narrative produced by

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Nancy Nuttbrock,PE to Focus on Texas Market

Brierley Associates celebrates the return of Ms. Nancy Nuttbrock, PE to focus on our growing business in Texas. Some of you may remember Nancy from her time with Brierley between 2000 and 2005. During that tenure, Nancy quickly established herself as an expert in the tunnel industry

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Mary O’Shea Joins Brierley Associates

The name may sound familiar to many of you as Mary had a successful tenure with the Underground Construction Association of Society for Mining, Metallurgy & Exploration Inc. otherwise known as UCA of SME.  Mary will be in our Denver office helping with a myriad of marketing

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Widening of Eastbound I-70 Tunnel – Idaho Springs, Colorado

Enlargement and widening of the eastbound tunnel of the I-70 Twin Tunnels in Idaho Springs Colorado was the selected by Colorado Department of Transportation as the best way to improve traffic flow and reduce congestion of this heavily travelled roadway that leads to ski resort and recreational

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New Hampshire

New York






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