Underground Detention
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R-Tank® Detention/Retention and Infiltration Systems

R-Tank® detention/retention and infiltration systems are among the most efficient systems available to provide underground storage for stormwater runoff. After a rain event fills the R-Tank®, stormwater can be routed to the drainage system, infiltrate into the ground, or be recycled for rainwater harvesting. The R-Tank® system provides an alternative to stormwater basins and is a highly effective, space saving alternative to other underground systems.

Why Do You NEED Modular Versatility?

Smaller Construction Footprint

  • The R-Tank is an open, 95% void system that encourages infiltration.
  • Combining the 95% void R-Tank with a 40% void aggregate base can decrease the overall excavation footprint while still meeting detention requirements.
  • No header rows, no diversion weirs or any other ancillary structures are required to tie in the R-Tank system to site storm.
  • Inlet and outlet pipes can connect directly to the R-Tank system.

Design & Construction Versatility

  • The modularity of the R-Tank allows for simple footprint changes on the fly without impacting storage volumes.
  • R-Tank modules are available in multiple configurations (LD, HD, SD, XD, and UD) with heights varying from 2 inches to 7 feet.
  • Easily supports traffic loading from parking lots and roads with module options for HS-20 and HS-25 rating with cover depths from 6 inches to 16 feet.
  • R-Tank systems can be combined into various shapes to efficiently work around obstacles/utilities and fit to the constraints of your site.
  • Elevations of the R-Tank modules can be varied to maintain cover beneath changing grade requirements
  • Module options for HS-20 and HS-25 rating with cover depths from 6” to 16’
  • R-Tank modules are shipped flat on pallets and can be assembled and installed by hand, making for a simplified installation process.
  • Combining with low impact design & green infrastructure

Combining R-Tank with bioretention and permeable pavement systems can maximize storage capabilities.

  • The R-Tank’s square flow area spreads stormwater flows across bottom, encouraging infiltration and time of concentration while transporting runoff to a discharge point.
  • R-Tank systems wrapped with an impermeable liner are perfect for stormwater reuse and rainwater harvesting systems.
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  • High capacity with 95% void space
  • Modular design
  • High strength
  • Lightweight and quick to install
  • Recycled content
  • LEED Credits
  • Longer-lasting horse tracks training fields
  • Irrigate without flooding
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Greenrise was created from a drive to not only bring solutions for erosion and sediment control, and stormwater runoff treatment, but to do it with the best products like certified bioretention soil and proven erosion solutions, and services like SWPPP management and vegetated roof design. This was our goal from the start, and it is still what pushes us forward every day.