a concrete structure for replenishing an aquifer and a method for constructing the same is provided . the structure is comprised of a pavement layer with surface drains that extend through the pavement layer and into an aggregate leach field . the leach field includes leach lines spanning the leach field . an aggregate drain extends from the leach field into a sand lens . precipitation which falls upon the structure thus flows through the surface drain , absorbed into the aggregate leach field , and transported to the aggregate drains by way of aggregate leach lines . the water is then absorbed into the sand lens , ultimately replenishing the aquifer . existing conventional pavement structures are retrofitted by the removal of a section of the pavement , and filling the same with porous concrete .