The PaveDrain System is a Permeable Articulating Concrete Block/Mat (P-ACB/M) that creates a performance pavement that integrates the patented arched reservoir to maximize onsite stormwater capacity during extreme storm events. This improves the typical storm hydrograph and increases environmental performance while reducing stormwater infrastructure costs. The PaveDrain can be installed either by individual units or pre-assembled in a variety of configurations customized for specific applications and installed very quickly with conventional construction equipment.