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#34 crushed granite, also known as #34 granite, large crushed granite, coarse granite aggregate, or granite drainage stone, is a heavy-duty angular aggregate commonly used for drainage, stabilization, erosion control, and structural support. It typically consists of granite pieces ranging from approximately 1 inch to 2 1/2 inches, although exact gradation may vary by quarry and regional specification.
The large stone size creates open spaces that allow water to move freely through the aggregate, while the rough, fractured edges help the pieces interlock and remain stable under pressure. Granite’s natural hardness and resistance to abrasion make #34 crushed granite especially durable in areas exposed to vehicle traffic, runoff, heavy loads, and changing ground conditions.
#34 granite is popular for projects that require more mass and structural support than smaller clean stone such as #57 granite. Its larger particle size performs well in deep drainage systems, erosion-prone areas, septic installations, and base reinforcement projects where dependable water flow and long-term stability are equally important. It can also be topped with smaller aggregate to create a smoother finished surface.
Common Applications of #34 Crushed Granite
- French drains and high-capacity drainage ditches
- Erosion control on slopes and embankments
- Driveway and parking-area base reinforcement
- Septic systems and drain fields
- Construction entrances and equipment access areas
- Stabilization over soft or muddy ground
- Culvert and stormwater drainage support
- Structural fill and jobsite stabilization
