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    What's the difference?

To resurface the roads, the division is using flex pave, which is similar to cold-mix asphalt and can be made by any paving company. Flex pave is a dense-graded cold-mix pavement surface course designed to be laid in thin lifts. This is achieved by using smaller aggregate than porous paving methods, emulsified asphalt, and a portable mix plant in conjunction with traditional lay-down and compaction equipment. Typically, flex pave is laid down with 1 to 1½ inch lift thickness. Flex pave varies from $6 per square yard for a 1-inch-thick layer to $10 per square yard for a 2-inch layer.

— Budhu is manager and Parekh is engineer III with Orange County Roads and Drainage Division.

Porous perks

Porous pavement has three major benefits:

  • This mix allows water to infiltrate at a much greater rate than existing dirt roads
  • It enables excess runoff to migrate to its edges and into existing drainage systems
  • The percolation and clean surface (cleaner than the dirt surface) results in less turbid runoff, and does not require the purchase of additional parcels for stormwater runoff detention/retention.