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Limestone 1"–3", also known as 1x3 limestone, large clean limestone, coarse drainage stone, or oversized crushed limestone, is a durable, angular aggregate typically ranging from approximately 1 inch to 3 inches. Its clean composition and broad stone size provide a strong combination of drainage, stability, and load-bearing support for demanding construction and site-development projects.
Because the material contains little to no stone dust or fines, it creates open spaces that allow water to move freely through the aggregate. The fractured edges help the stones interlock and remain stable under pressure, making 1"–3" limestone effective in wet areas, drainage systems, and structural applications where smaller stone may shift or clog more easily.
Limestone 1"–3" is widely used as a drainage layer, structural backfill, and stabilization stone. Its size makes it substantial enough to support heavy loads while still being practical for installation around culverts, retaining walls, septic systems, and large drainage trenches. Exact gradation may vary by quarry and regional specification.
Common Applications of Limestone 1"–3"
- French drains and high-capacity drainage systems
- Septic and leach field installations
- Culvert and ditch reinforcement
- Retaining wall backfill and stabilization
- Foundation and perimeter drainage
- Slope stabilization and erosion control
- Base reinforcement over soft or unstable ground
- Construction entrances and equipment access areas
