Business Details
Geotechnical Construction Services in Oakland, CA
Condon-Johnson & Associates is an innovative geotechnical construction contractor specializing in complex foundation systems for commercial, heavy civil, and industrial projects across the Western United States. With district offices in Oakland, Los Angeles, San Diego, Seattle, and Portland, our team of geotechnical experts collaborates closely with public agencies and private industry to deliver tailored solutions for challenging design-build projects. Our expertise spans deep foundations, earth retention, ground improvement, grouting, and dewatering services. We utilize advanced installation techniques and specialized equipment to address unique project requirements, including extreme environmental conditions and historically significant structures.Our commitment to safety, precision, and schedule adherence has been demonstrated through successful completion of landmark projects such as the I-5 North Coast Corridor bridge replacement, Port of Juneau cruise ship berths, and Calaveras Dam foundation work. By combining technical expertise with collaborative project management, we consistently deliver high-capacity infrastructure solutions that meet rigorous engineering standards.
Services
Deep Foundations
Earth Retention
Grouting
Ground Improvement
Dewatering
Micropiles
Soldier Piles
Rock Socket Drilling
Underpinning
Compensation Grouting
Highlights and features
- We offer specialized geotechnical expertise for complex foundation systems
- Our strategic Western US office locations enable local project collaboration
- We utilize advanced drilling techniques and specialized equipment
- Our team has extensive experience with challenging marine environments
- We maintain a proven safety record on high-risk infrastructure projects
Services
Deep Foundations
Our deep foundation solutions include drilled shafts, micropiles, and tiedown anchors for infrastructure projects requiring load capacities up to 600,000 pounds. We employ vibrated casing, oscillator systems, and slurry displacement drilling techniques to install piles reaching depths of 260 feet below grade. This expertise ensures structural stability for bridges, high-rise buildings, and critical infrastructure in challenging geological conditions.
Earth Retention
We provide comprehensive earth retention solutions including soldier pile walls, soil nail walls, and secant pile systems. Our underpinning techniques preserve historic structures while enabling adjacent construction, as demonstrated in San Francisco's 100-year-old brick wall preservation project. These systems ensure safe excavation and structural stability in urban environments with limited access.
Grouting
Our grouting services include permeation, compaction, and compensation grouting using cement-based stable high-mobility grouts. We employ real-time computer monitoring systems for precision grout injection in dam foundation projects. This technology enables controlled ground stabilization and seepage prevention in critical infrastructure applications like the Calaveras Dam replacement project.
Ground Improvement
We implement ground improvement techniques such as deep soil mixing, stone columns, and rigid inclusions to enhance soil bearing capacity. These methods address challenging subsurface conditions encountered in projects like the Purple Line Extension through Los Angeles' tar-impacted sands, ensuring stable foundations for transportation infrastructure.
Dewatering
Our dewatering solutions include deep well systems and well point installations for managing groundwater during excavation. These systems maintain dry working conditions for foundation construction in water-saturated environments, supporting safe and efficient project execution across diverse geological settings.
Questions
What geographic areas do you serve?
We operate throughout the Western United States, with district offices in California, Oregon, Washington, and Alaska.
What types of projects do you specialize in?
We focus on complex geotechnical construction for commercial, heavy civil, and industrial projects requiring deep foundations and earth retention systems.
Can you handle marine environment construction?
Yes, we've successfully completed challenging projects in severe marine environments like the Port of Juneau cruise ship berths installation.
Do you work on historic preservation projects?
Yes, we've provided underpinning solutions for historic structures including 100-year-old unreinforced brick walls in San Francisco.
What safety measures do you implement?
We maintain rigorous safety protocols demonstrated by incident-free completion of complex projects like the Purple Line Extension's 1,545 soldier pile installation.
How do you handle difficult access conditions?
We utilize specialized equipment and techniques, including four different drill rig types for the Calaveras Dam project's challenging access requirements.
