Deep Foundation Testing, Analysis, and Consulting Services. 

GRL Engineers services range from small specialized testing jobs (such as evaluating unknown foundations)
to large-scale projects requiring the monitoring and analysis of hundreds of test piles nationwide.

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Statement of

QUALIFICATIONS

GRL Engineers, Inc, is a professional engineering firm established to provide specialized foundation testing, analysis, and consulting services to the deep foundation industry. GRL operates the largest dynamic pile testing firm in the world, as well as an industry leading provider of integrity test methods for deep foundations including thermal integrity profiling, cross-hole sonic logging, and low strain integrity testing.

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Services

Testing & Consulting

GRL Engineers offer a wide range of deep foundation testing and consulting services, nationwide. Most GRL Engineers have achieved Advanced Level or higher on both the PDCA/PDI Dynamic Measurement and Analysis Proficiency Test. 

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Projects

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case histories >
Velsicol Chemical Corporation Superfund Remediation
Challenge: The Velsicol Chemical Corporation in St. Louis, Michigan underwent a Superfund Remediation Program initiated in 1999 to address environmental concerns. Issues of contamination in surrounding soil and the Pine River led to remediation. Once river sediment and soil contamination were addressed, it was determined that a downgradient vertical barrier…
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Barrette Integrity Measurements for High Rise Construction in Paraguay
Challenge: A 55‑story residential tower in Asunción required measurement of concrete integrity for deep barrette foundations installed within a constrained urban site. The foundation system consisted of 44 barrettes, each approximately 36 to 40 meters in length. The size of the reinforcement cages, combined with limited site access, required an…
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Remote SQUID Testing at Frankfort Road over Raccoon Creek – ECMS 101165
Challenge: GRL Engineers, Inc., provided drilled shaft base cleanliness testing services for the Frankfort Road over Raccoon Creek Bridge Replacement Project in Monaca, PA. GRL was contracted in 2025 to provide SQUID testing, a quick and reliable method to obtain quantitative measurements of the debris thickness at the bottom of…
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