The Bridge Fellowship - Lebanon TN Case Study

Key Takeaways

• Dual AquaCell SC-2 (Standard Configuration) detention tanks provided over 12,000 ft³ total

  storage.

• Modular system enabled installation within two constrained parking-lot basins.

   

• Coordination with Integrated Technologies and Warren & Tuggle Civil Engineering supported

  drainage alignment to two natural outfalls.

   

• Madison Contractors executed excavation and installation efficiently despite challenging rock

  conditions.

The Problem

The site exhibited significant topographic variation and drained toward two separate outfalls. Warren & Tuggle Civil Engineering identified the need for two independent underground detention systems that could fit within lower parking bays while meeting HS-20 loading and minimum cover requirements. Madison Contractors also required a constructible solution given the site's rocky excavation condition.

The Solution

Wavin designed two AquaCell SC-2 detention tanks: a West Tank with 5,085 ft³ storage and an East Tank with 7,067 ft³ storage. Each tank incorporated non-woven geotextile wrapping, crushed stone embedment, and pipe connections using geotextile boots. Warren & Tuggle provided drainage
alignment and grading coordination, while Madison Contractors performed the excavation, base
preparation, and installation of the modular units. The modularity allowed the system to follow site
grading and optimize available footprint.

The Impact

The dual-tank configuration aligned with the split drainage basins, reducing storm infrastructure
complexity. Close coordination with Warren & Tuggle ensured hydrologic requirements were met, and Madison Contractors' installation approach minimized excavation time. The AquaCell SC-2 system delivered more than 12,000 ft³ of combined storage while maintaining traffic-rated cover, supporting long-term performance and project schedule needs.