Creating Space Underground




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Mine Subsidence, Assessment and Mitigation in Wyoming

David Hallman, PE, PG

Mohamed Gamal, PhD, PE

Ryan Marsters, PE, PG abundant coal deposits and the transcontinental railroad in southern Wyoming, a number of communities were founded to supply steam engines with coal. In many instances development occurred directly above the underground mine workings, which over time often collapse and pose an on-going surface subsidence hazard. Depending on location and subsurface conditions, collapse features range from sinkholes as shown in the image, to building cracks.




George A. Fox Conference

New York, NY

Brierley Associates is a Bronze Sponsor of the upcoming UCA-SME

George A. Fox Conference to be held in New York City on January 24, 2017. This year's theme is New Tunneling Technologies with presentations on US and Canadian Transit Programs and East Coast Water Supply. We will be well represented by AJ McGinn, Gregg Sherry, Alan Howard and Jeremiah Jezerski at the conference.



Brierley Continues to Expand BIM/VDC Services Associates continues to expand our BIM/VDC services.  To date we have participated in over 20 collaborative BIM projects for underground and support of excavation work.  We have a team who understands that the success of BIM does not rely on the software alone, but the ability to communicate, collaborate, cooperate, and coordinate.  Jake Koelliker is the latest to join our BIM/VDC team and he understands the BIM process.  Jake received his bachelor's degree from Brigham Young University in Construction Management and began working as a VDC/BIM Engineer shortly thereafter. Jake has worked on coordinating healthcare, waste water, parking garages, solar, and multi-purpose facilities specializing in self-perform cast-in-place concrete. He also was an essential part of developing work flows and establishing standards for self-perform concrete through the production of Concrete Lift Drawings and the inclusion of Collaboration for Revit, Autodesk Point Layout, SCRUM, Kanban, and other LEAN practices.


Jake Joined Brierley Associates in October and has been helping to coordinate several large SOE designs in the San Francisco Bay Area.  Jake's ultimate goal is to create a collaborative environment where all project conflicts are resolved virtually in an efficient and productive manner prior to construction.



Brierley's Moraga Office Welcomes Kristin Kwok received her bachelor's and master's degree in Civil Engineering from UC Berkeley, and was awarded the departmental citation for her undergraduate work. Having focused on geotechnical and structural engineering, Ms. Kwok is excited to apply her knowledge to the geo-structural work at Brierley. In her free time, Kristin enjoys playing the piano.


Kristin may be contacted in our Moraga, CA office at 925.247.9000 ext. 124 or by e-mail at





Brierley Associates offers North American experience related to dams, locks, and levees. This experience ranges from post Katrina response in Louisiana to the Mormon Island Auxiliary Dam Key Block project that enhances seismic stability of an earthen dam located in California. Clients such as the Corps of Engineers, Bureau of Reclamation as well as various state and local entities look to Brierley to help with:

  • Geotechnical/Geological Engineering
  • Dewatering Stability & Control of Groundwater
  • Engineering During Construction
  • Potential Failure Mode & Risk Analysis
  • Geohazard and Fatal Flaw Assessment
  • 3D Finite Element Modeling
  • Design of Levees and Dams

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Creating Space Underground - Coast to Coast

Brierley Associates, 990 South Broadway, Suite 222, Denver, CO 80209



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