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.

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

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

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

Twin Box Tunnels – Liberty University, Lynchburg, Virginia

In December of 2013 this project at Liberty University had reached the halfway point with the first of the two 2,100 ton, 16 foot high, 28 foot wide, 130 foot long cast on-site reinforced concrete box tunnels in place. The two vehicular tunnels will provide access to