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DOT #2 limestone, also known as #2 DOT stone, certified #2 limestone, coarse crushed limestone, or specification-grade aggregate, is a large, angular stone produced to meet applicable state Department of Transportation requirements. It is commonly sized around 1 to 2 inches, although exact gradation may vary by state specification and approved quarry source.
Its coarse size and fractured edges provide strong load distribution, dependable drainage, and long-term stability under traffic, heavy equipment, and changing site conditions. The angular stone interlocks more effectively than rounded gravel, helping the material remain in place while allowing water to move freely through the aggregate.
DOT #2 limestone is widely used in roadway, municipal, commercial, and heavy-duty site-development projects that require consistent quality and spec-compliant performance. It is especially effective as a deep base or stabilization layer beneath smaller compactable aggregate, where it helps reinforce soft ground and improve structural support.
Common Applications of DOT #2 Limestone
- Road base and sub-base stabilization
- Construction entrances and equipment access roads
- Deep base beneath driveways and parking areas
- Stabilization over soft or muddy ground
- Culvert and drainage reinforcement
- Erosion control and washout protection
- Heavy-duty structural backfill
- Municipal and infrastructure construction projects
