Reservoir Course (Porous Pavement)

02/03/2026

“Where does porous pavement hold water?”

Porous pavement can hold water that enters its surface. But how exactly does it do that? Well, inside the porous pavement, there is a section called a Reservoir Course. The reservoir course used air voids to hold water until it can infiltrate into soils or sub-drains away. The reservoir course can vary in size according to project needs and any applicable regulations.

Image credit: https://water.phila.gov/