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DOT #57 certified limestone, also known as #57 DOT stone, certified #57 limestone, washed limestone, or specification-grade drainage stone, is a clean, angular crushed aggregate produced to meet applicable state Department of Transportation requirements. It typically contains limestone ranging from approximately 1/2 inch to 1 inch, with most pieces averaging around 3/4 inch. Exact sieve gradation may vary by state specification and approved quarry source.
Because the stone is washed and contains little to no dust or fines, it creates open spaces that allow water to drain efficiently. Its fractured edges help the aggregate interlock and remain stable under load, providing a dependable combination of drainage, durability, and structural support.
DOT #57 limestone is one of the most widely used construction aggregates because its versatile size performs well across roadway, concrete, drainage, utility, and site-development projects. Certified material provides consistent quality and predictable performance for contractors, municipalities, and commercial projects that require specification-compliant aggregate.
Common Applications of DOT #57 Certified Limestone
- Driveways and roadway support layers
- French drains and stormwater systems
- Retaining wall and foundation backfill
- Concrete production and aggregate mixes
- Pipe bedding and utility trench support
- Perimeter and subsurface drainage
- Structural support beneath slabs
- Municipal and commercial construction projects
