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Martha Gardens Green Alleys

Design Features of the Alleys

Diagram of permeable concrete paver system


  1. Recycled flyash concrete, 6" thick 
  2. Permeable concrete pavers, 3" thick
  3. Asphalt strip, 2" thick
  4. Fabric-lined trench
  5. Porous sand
  6. 12" perforated plastic pipe
  7. Porous stone
  8. Native soil
  9. Base rock