IDOT CA6 ACBF

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Backfill, Pipe Bedding, Drainage, Subbase, Road Base.

M-DOT 22A Natural Sand & Gravel conforms to all the requirements of Michigan Department of Transportation (M-DOT) “2003 Standard Specifications for Construction,” section 902

The 22A Natural Sand & Gravel should be placed 6″-18″ (150mm-450mm) thick, depending upon ground conditions and design loadings, in lifts not exceeding 8″ (200mm). Prior to the placement of any base material, the grade should be compacted and trimmed to the design density & elevations and be free of any standing water and not in a frozen condition. Base material should be compacted at optimum moisture content (≈6%-8%) to 95%-100% relative density or to the compaction level as specified in the design plans.