Condon-Johnson & Assoc

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3125 E Guasti Rd
Ontario, CA 91761
+1 (909) 390-0268
https://condon-johnson.com

Condon-Johnson Associates is a leading geotechnical construction contractor based in Ontario, CA, recognized for its expertise in designing and building complex foundation systems for commercial heavy civil and industrial projects across the Western United States. With district offices in major cities including Oakland, Los Angeles, San Diego, Seattle, and Portland, the company collaborates closely with local public agencies and private industry to address challenging design-build projects.

Specializing in services such as deep foundations, earth retention, ground improvement, grouting, and dewatering, Condon-Johnson has successfully completed numerous high-profile projects, demonstrating innovative techniques and solutions. Their portfolio includes notable projects like the I-5 North Coast Corridor in San Diego and the Purple Line Extension in Los Angeles, showcasing their ability to tackle complex installations in demanding environments.

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