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===Underdrain===
===Underdrain===
[[File:PermeablePaving CS.png|frame|Permeable Pavement cross sections showing full and partial infiltration designs. Source: GVRD]]
[[File:PermeablePaving CrossSection.png|frame|Permeable Pavement cross sections showing full and partial infiltration designs. Source: GVRD]]
===Finish course===
===Finish course===
Consult the manufacturer for the design specifications of their product. In pervious concrete and porous asphalt systems, the concrete or asphalt mix specifications and construction procedures are key to proper functioning. These systems require well-trained and experienced contractors for installation.
Consult the manufacturer for the design specifications of their product. In pervious concrete and porous asphalt systems, the concrete or asphalt mix specifications and construction procedures are key to proper functioning. These systems require well-trained and experienced contractors for installation.