Installation of WaterSilo Tanks and companion Drywells is best accomplished by vertical shaft drilling or caisson sinking/stacking.  These are proven method developed for bridge piers, tunneling, mining, wells, and pump stations.  Open excavation may also be used instead, but will require shoring. 

The excavation creates a hole that is marginally larger than the tank and thus minimizes the footprint.  The vertical shaft leaves an annulus around the tank that is filled with concrete to encase the FRP tank for added strength and weight against flotation.  The shaft can also serve as a microtunneling pit for  connection piping. 

In developed urban areas, impervious surfaces such as pavement and roofs prevent precipitation from naturally soaking in and recharging the groundwater. This results in increased runoff volume and peak.

WaterSilo is a system of vertical, large-diameter, interconnected underground vessels for stormwater storage (cistern), or detention-infiltration (drywell). Because of its vertical orientation, WaterSilo has a small footprint that fits in the public right of way, and is therefore a highly flexible stormwater management tool, particularly for Green Streets.

Multiple WaterSilos can be installed under roads throughout an urban watershed to capture runoff from various size basins.