GravelPave2 is a structure to provide heavy load bearing support and true containment of gravel to create a porous surface with unlimited traffic volume and/or duration time for parking. The system can be used for storage and filtration of rainwater. For example, a cross-section with an 12" deep base course (at 20% void space) and the one inch of Gravelpave2 (at 35%) would store 2.75" of rain. Although bacteria concentrations are lower than with Grasspave2, polluted runoff and vehicle drippings are consumed prior to reaching the water table.