California Department of Resources Recycling and Recovery (CalRecycle) 

Tire-Derived Aggregate Projects

Los Angeles County Area Landfill

TDA placement in gas collection trench.

Tire-Derived Aggregate as Landfill Gas Collection Application

In this landfill application tire-derived aggregate (TDA) has been used in the landfill gas collection trenches. The landfill gas collection system used the same pipe that would normally be used. However, instead of using rock aggregate, Type A TDA was called out as a replacement. Installation began with the excavation of a 3-by-3-foot trench into existing waste; the waste was immediately relocated to the active landfill area.

Approximately six inches of TDA was placed on the bottom of the trench as a base material for the pipe. After the landfill gas collection pipe was in place, an additional 12 inches of TDA was placed over the pipe.

The TDA was covered with a geotextile material and cover soil was placed to fill the remaining portion of the trench.


Gas collection pipeline covered in TDA material.

Last updated: December 3, 2010
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