Creating Space Underground


MARCH 2016


Brierley and BIM in San Francisco

San Francisco, CA

Mike McTeer

Eric Lindquist, PhD, PE the midst of one of San Francisco's largest new-housing and office construction booms in history, Brierley Associates has been busy designing deep excavation support systems for many of these new tall and deep structures. One of our most-recent support of excavation design projects is the Transbay Block 9 development. A multi-residential project consisting of a 43-story tower on Folsom Street attached to an 8-story podium building on Folsom and First Street, and a row of two-story townhouses on the south side of Clementina Street. The Transbay 9 Tower shown in the image to the right was designed by the San Francisco office of Skidmore, Owings & Merrill, LLP. Brierley, as the sub-consultant design engineer for Malcolm Drilling, designed the 69-ft deep support of excavation for this new high rise basement structure.


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The 2016 World Tunnel Congress

San Francisco, CA

Alan Howard, PG Associates is excited to help showcase North American Tunneling to global visitors when the World Tunneling Conference (WTC) arrives in San Francisco, California, April 22-28, 2016.  WTC 2016 is a joint conference event combining the International Tunneling Association (ITA) Annual Congress with the biennial North American Tunneling Conference.  With as many as 2,500 attendees, 600 unique technical presentations, short courses and breakout sessions, and more than 200+ exhibitors expected from around the world, we will have the chance to interact with peers representing all types of products and services for the tunneling and underground construction industry. Brierley's participation in WTC 2016 includes conference organization, technical presentations and attendance by Brierley tunneling staff.  Alan Howard, Managing Partner, is a member of the conference organizing committee responsible for technical field trips. The trips include a tour of the SEM caverns at Chinatown Station for the Central Subway, where Brierley is working for Tutor Perini. Of course a visit to California would not be complete without a combined Napa winery/wine cave tour.  Additionally, a post-conference tour is scheduled at the SR99/Alaska Way Viaduct Tunnel where Brierley is working for Seattle Tunnel Partners, a joint venture of Tutor Perini and Dragados, USA.  Alan also served as technical reviewer of manuscripts being published and will co-chair a Technical Session, "Tunneling Advances Through Innovation".  In addition, Brierley Partners Dr. Mohamed Gamal and Bill Zietlow are presenting and publishing a paper "Underground Space for Oil Mining". 



NASTT No-Dig Show

Dallas, TX 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 Tom Gallier, (Brushy Creek Regional Utility Authority). The presentation will focus on geotechnical and geologic information collected to date for preliminary design of tunnels, shafts and pump station suction chambers for a new water supply intake to be constructed near the deep water channel of Lake Travis in central Texas.


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ACEC Missouri Grand Award Winner Associates congratulates the Cole Junction Team led by Donohue Associates for being recognized with a Grand Award in Engineering Excellence by ACEC Missouri. Brian Dorwart, Nick Strater and Tom Pullen of Brierley Associates were on the design team for a 2,350-lf of 24-inch diameter force main crossing beneath the Missouri River that was completed via Horizontal Directional Drilling and fusible PVC pipe. During the upcoming NoDig Conference in Dallas, Texas a paper, which was co-authored by Brian Dorwart and Mike Fitzhenry will be presented by Mr. Eric Seaman of Jefferson City.


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Brierley's Texas Region Welcomes Greg Van Etten has been with Brierley Associates for 5 years, and in June 2016 he will transfer to Texas after wrapping up the Kaneohe-Kailua Sewer Tunnel project in Hawaii. He earned a BS in Earth and Space Sciences from the University of Washington.  Since joining Brierley in 2011, Greg worked at Brierley's Moraga, CA office on the New Irvington Tunnel water supply tunnel in the San Francisco Bay Area; Caldecott 4th Bore Tunnel that connects Oakland and Orinda, California through the Berkeley Hills and; River Supply Conduit 1A Tunnel Sinkhole Investigation, Los Angeles. 


Greg may be contacted in our Austin, TX office at 512.219.1733 or by e-mail at



Brierley Welcomes Jacob Mitchell to Texas has been with Brierley Associates for 6 years, and will transfer to our Texas operations from Brierley's Moraga, CA office in April 2016.  He earned his BS and MS in Civil Engineering from the University of Colorado.  Since joining Brierley in 2010, Jacob worked at our home office in Denver, CO.  Some of his projects included the Twin Tunnels Widening, Eastbound and Westbound, Idaho Springs; Gumlick, Vasquez, and South Boulder Tunnel Inspections; Paradise Whitney Interceptor, Las Vegas, NV; and the Central Weber Sewer in Ogden, UT.  Jacob moved to Brierley's Moraga, CA office where he was instrumental in Brierley's successful involvement on the SR-99 Access Shaft to retrieve and repair "Bertha" in Seattle, WA.


Jacob may be contacted in our Austin, TX office at 512.219.1733 or by e-mail at





Brierley Associates delivers intrinsic, recognizable value to our owner, A/E firm, and contractor clients by focusing on constructability, efficiency and practicality.  Our geotechnical and structural design and consulting services are founded on a keen understanding of our clients' needs, subsurface conditions, site-specific constraints, and the risks associated with the construction of tunnels, underground facilities and heavy civil infrastructure projects.


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