CON/SPAN is a modular precast system designed to provide economic,
large volume stormwater detention or infiltration below grade.
CON/SPAN’s distinctive arch top and vertical side walls maximize
storage volume and provide structural integrity. Combining the CON/SPAN
arch unit with precast walls and cast-in-place foundations allows for
an array of configurations to meet nearly any site need.
Construction of cast-in-place strip footings beneath CON/SPAN legs
and end walls allow for a large open area in the center of each cell.
These cells can be filled with crushed stone or granular material to
allow for stormwater infiltration or recharge by percolating runoff
through the granular material inside of the foundation.
CON/SPAN system provides efficient stormwater detention in a variety
of footprints. Installation on a base slab foundation can be made
watertight, which is ideal when dealing with high water table issues or
subgrade soils sensitive to water infiltration.
CON/SPAN can be combined with the Stormwater Management StormFilter to provide high-volume stormwater treatment.