James Jardine Water Purification Plant

CTLGroup performed a condition assessment of thousands of precast concrete channel slabs that comprised the roof over a large filtration building. Deterioration observed during the visual review included spalled flanges with exposed corroded reinforcement, longitudinal cracking in the flanges, web spalls, and excessive web cracking. Based on the assessment. CTLGroup ultimately determined that replacement of distressed channel slabs was the only practical repair solution.

The City of Chicago commissioned a comprehensive removal and replacement program for the roof of the filtration building. As part of the program, CTLGroup was retained to design a more durable channel slab, which included a high performance concrete mix and enhanced concrete cover over the reinforcing steel. CTLGroup also performed submittal reviews and quality assurance reviews at the precast concrete fabrication plant.


Buildings & Facilities

Civil Infrastructure

Energy & Resources

Consulting Services

Concrete Mixture Development & Qualification

Materials Science + Engineering

Structural Engineering + Evaluation

Non-Destructive Evaluation

Repair, Restoration, Retrofit

Structural Condition Assessment

Formerly the Central District Filtration Plant, the Jardine Water Purification Plant is the largest capacity water filtration plant in the world and sends close to one billion gallons of water per day to the north and central parts of Chicago.


Year of Completion


Hours Worked


Year Opened

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