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.

Tunnel Achievement Award Winner – Lake Mead Intake No. 3

Congratulations to all Lake Mead Intake No. 3 Team Members on this award that was announced in the July 22, 2016 issue of Tunnel Business Magazine. Years in the making, this project created a new intake at the bottom of Lake Mead that would allow water supply to

Read more

Dorwart and Strater – Speakers at Upcoming ASCE Pipeline Conference

    Brian Dorwart and Nick Strater will both be speaking at the at the Manual of Practice for Horizontal Auger Boring Projects Workshop on Sunday July 17, 2016 in Kansas City. Their topic is Geotechnical Investigations for Horizontal Auger Boring projects. Nick serves on the Manual of

Read more

Long Haul HDD – Trenchless Technology Magazine

 Mayo, Maryland HDD Project in the News Again Our January 2016 issue of In-Depth featured a 4,100-ft HDD crossing of the South River in Anne Arundel County, MD. Thor Young,PE – Principal Manager at GHD and Nick Strater,PG – Brierley’s Trenchless Practice Leader give readers an update

Read more

InDepth March 2016 Available in Our Press Room

Featured Articles Brierley and BIM in San Francisco Mike McTeer and Eric Lindquist,PhD,PE The 2016 World Tunnel Congress Update from Alan Howard NASTT No-Dig Show, Dallas TX Update ACEC Missouri Grand Award Winner- Cole Junction HDD Brierley’s Texas Region Welcomes Greg Van Etten and Jacob Mitchell  

Read more

NASTT No-Dig Show – Dallas TX March 20-24, 2016

Brian Dorwart, Nick Strater, Nancy Nuttbrock, Lewis Yates and Kevin Mandeville at No-Dig   This year No-Dig will be held in Dallas and Brierley Associates will attending. Additionally Lewis Yates will be presenting “Tapping Lake Travis” that was co-authored by Kevin Mandeville, Aaron Archer (HDR Engineering, Inc.) and

Read more

Office Locations








New Hampshire

New York






Mailing List

Join our mailing list.

Connect With Us