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1" Clean Granite

Clean 1" — washed, no finesOne-inch clean angular granite drainage stone with no fines

1" Clean Granite is a washed, single-size coarse aggregate with no fines, meeting AASHTO M43 #4 and commonly specified simply as "1" Clean" for drainage applications. Its open structure provides excellent permeability, making it the standard choice for storm drainage, underdrain systems, and foundation drainage blankets.

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Technical Data

Specifications

SpecificationStandardNotes
GradationASTM D448Single-size, washed
Wet Electrical ResistivityAASHTO T288Available on qualification
DOT ApprovalAASHTO M43 #4Drainage designation
Where it's used

Common Applications

Storm drainage
Underdrain systems
Foundation drainage blanket
Filter layer
Retention pond lining
Compliance

Available Documentation

  • Gradation report
  • Wet electrical resistivity testing
  • State DOT approval letter
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