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CR&R La Pata Transfer Station Awarded Outstanding Structural Engineering Project

Where Geo-Structural Engineering Made the Difference

Some projects demand more than technical expertise—they require alignment, adaptability, and trust across every discipline.


The CR&R La Pata Transfer Station in Orange County is one of those projects.

Recently recognized by the ASCE Orange County Branch as an Outstanding Structural Engineering Project, this work reflects the power of integrating geotechnical insight with structural execution—from concept through construction.



A Challenging Site with No Room for Error

CR&R La Pata Transfer Station Awarded Outstanding Structural Engineering Project


Set against steep terrain with adverse geologic conditions, the site presented significant slope stability challenges. Adding to the complexity, a high-pressure petroleum pipeline ran along the upper portion of the slope—requiring precision, protection, and constant coordination.

Rather than treating geotechnical and structural as separate efforts, GMU approached the project as a fully integrated geo-structural solution.


Designing Stability—Together

The team designed a 1,400-foot-long, tieback-supported retaining wall system, reaching heights of up to 26 feet, supported by a network of reaction blocks and tiebacks.

But the real story lies in how it was built:

  • Tiebacks installed at steeper-than-standard angles to protect existing infrastructure

  • A top-down construction approach to maintain stability during excavation

  • Real-time monitoring and adaptive sequencing to respond to field conditions

  • Continuous coordination between design, field observation, and construction teams

This wasn’t just engineering—it was engineering in motion.


The Value of Geo-Structural Integration

By combining geotechnical and structural services under one team, the project benefited from:

  • Faster decision-making in the field

  • More efficient construction sequencing

  • Reduced risk to critical infrastructure

  • A safer environment for crews

  • Long-term slope performance and stability

The result was a solution that not only worked—but worked efficiently, safely, and with purpose.


A Shared Effort

Projects like this are never done alone. Strong collaboration with partners including Huitt-Zollars, ECM, DrillTech, and Crede played a key role in delivering a successful outcome.


Recognition That Reflects the Work

Being honored as an Outstanding Structural Engineering Project is meaningful—but more than anything, it represents the commitment of a team focused on doing things the right way.

Thoughtfully. Collaboratively. And with a deep respect for the challenges each project brings.


👉 Watch the project video and explore the full story:


GMU Engineers and Geologists is honored to provide multi-disciplinary engineering and inspection services for legacy-defining projects across Southern California. With over five decades of experience in geotechnical engineering, structural support, and materials testing, we deliver solutions that build stronger communities.

Learn more at www.GMUgeo.com

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