WaterSilo drywells can fit under public roads making them a unique sub-regional BMP for low flow diversion and municipal MS4 compliance.

The main difference between WaterSilo municipal drywells and conventional drywells, which also fit in the public ROW, is that conventional drywells do not provide any significant stormwater detention. So their inflow capacity is limited to their infiltration rate, requiring numerous drywells for a given sub-basin.

WaterSilo drywells each provide a large detention volume that greatly increases their inflow capacity.  This leads to fewer number of drywells and significant reduction of schedule and cost for a given sub-basin.