Constructing two retaining walls was the essential first step for Cobb County D.O.T. before they could begin to implement their proposed site improvements along Little Willeo Road. Two retaining walls would provide the necessary grade separation to allow road widening, and without them, there would be no viable space for sidewalk or drainage upgrades.

The general contractor, Georgia Development Partners, suspected that the original design for the retaining walls as reinforced, cast-in-place concrete structures would not be the most cost-effective approach for the project. To confirm their theory, Georgia Development Partners joined with Piedmont Precast and confirmed that the Redi-Rock system would indeed be a suitable alternative.

Piedmont Precast contacted JC Hines & Associates to prepare a construction feasibility assessment and preliminary design for an optimized Redi-Rock solution. With accurate material quantities and reliable construction cost estimates, the contractor was able to demonstrate to the Cobb County D.O.T. that the Redi-Rock system would in fact, provide a suitable and more economically attractive alternative for the project.

The final design called for both walls to be designed and constructed as Redi-Rock gravity walls. To approve the proposed value engineering, key considerations had to be satisfied, such as achieving the maximum design height of 15 feet without need for external reinforcement or earth anchors. Staying within the available space was critical to passing the design into the construction phase.

Completed in 2016, with a total face are of 4,965 square-feet. Wall design by JC Hines & Associates and Redi-Rock blocks manufactured by Piedmont Precast.