Detention & Retention
Unlike conventional detention/retention systems, retain-it takes advantage of internal hydraulics to optimize storage volumes and to support engineering applications such as flow attenuation, head optimization and controlled retention time. These functions are achieved by utilizing low flow channeling, controlled isolation chambers, and hydraulic separation techniques via weirs, baffles, walls and orifice control devices.
Due to its modular and uniform design, retain-it stormwater detention/retention systems offer:
- One of the highest storage volume to system footprints in the industry
- Integrated water treatment and flow control devices within a single system, reducing the number of additional structures required to comply with storm water regulations.
retain-it detention/retention systems offer engineers a new tool in their efforts to design cost effective stormwater management systems while reducing land impacts and costs of compliance.
Infiltration
retain-it stormwater infiltration systems provide one of the industry’s highest “infiltration rates per surface area” available on the market today. For systems with a profile of at least three feet, total costs (value engineering) of retain-it infiltration systems fall anywhere from 10% to 30% below traditional pipe/structural stone systems. These saving are realized largely through a substitution of retain-it modules (80% + void ratio) for structural stone (40% void ratio) – this increase in storage volumes enables a significant reduction in footprint for any given infiltration system.
Like any other retain-it stormwater management system, internal controls can be incorporated into an infiltration system, creating treatment zones which filter out impurities, pre-infiltration. Additionally, retain-it modules are manufactured to meet a true standalone H-20 loading capacity – our infiltration systems can be built beneath parking lots, roadways, or buildings without relying on a structural stone zone for support.
