City officials in Chattanooga announced a plan to prevent wastewater from their combined sanitary sewer system from overflowing into the Tennessee River. The plan suggested that three massive storage tanks with a collective capacity of 30 million gallons be installed at the Hamm Road Equalizer Station. Because of the size and significance of the tanks, a maintenance access road adjacent to the tanks was required, but the only way to create access was with a strong retaining wall.

Ryan Viva of U.S. Retaining Walls, the retaining wall installation contractor, considered several types of  wall systems, but concluded that Redi-Rock would offer the most cost-effective solution given the limited site access and required construction schedule. Viva then reached out to Bradley Tank & Pipe, the local Redi-Rock producer, to prepare an accurate bid proposal. 

Bradley Tank & Pipe retained the services of JC Hines & Associates for the preliminary wall design and detailed material quantities. Following the original proposal’s acceptance by the city officials, the team at JC Hines could begin finalizing the design.

 To increase wall stability, JC Hines & Associates designed the 22.5-foot-tall structure on top of a concrete leveling pad. With the use of Redi-Rock’s XL units, Viva’s installation team could efficiently secure the structure while saving significant time, money, and space. The 10,173 square foot wall was completed in just 33 working days.