Stormwater Detention For Restaurant Parking Lot

Existing downstream storm water problems and an undersized storm sewer made permitting of a new Wendy’s Restaurant difficult. The city demanded on-site detention of a 25 year storm, requiring a 5,000 cubic foot detention system for a one acre site. With a building footprint that took up much of the existing lot, finding space for this much water seemed difficult.

CTL Engineering in Morgantown, WV met the challenges of this site with Atlantis Flo-Tank® tank system. A rectangular system designed to maximize the efficiency of a rectangular excavation, a Triple Atlantis Flo-Tank® module (52″ deep) created enough capacity to detain the storm water between the building and adjacent lot. Without a lot of space to work, installation was a snap, since the lightweight Atlantis Flo-Tank® modules could be installed by hand. The unique orifice for discharging storm water included a multilevel release system which increases the flow as the system fills.