Capture large volumes of stormwater runoff with a smaller footprint than traditional underground systems using the NDS StormChamber® system. The modular stormwater chambers can be laid out in unique configurations to fit job site requirements, and stacked to increase storage capacity while maintaining usable space above ground. This 18 in. high drainage chamber features minimum installed storage of 70 cubic feet and internal chamber volume of 25 cubic feet. The closed unit can be used on its own; to increase storage, additional units can be interconnected with pipe from side portals. StormChamber units are made of thermoformed high-density weight polyethylene, engineered to withstand extreme environments, exceeds the AASHTO H-20 design load, and allow for deeper cover than other systems. Use included SedimenTrap™ devices to capture sediments and help extend the lifespan of the system.