Our 3"x2" and 6 inch +/- (4"x9" Rip-Rap) large drain-rock aka crushed-rock is a coarse, angular crushed rock designed for high-flow drainage and heavy-duty erosion control. Sourced from trusted Northern California quarries, these larger rock sizes offer excellent permeability, durability, and load-bearing performance.
 
This material is commonly used in drainage ditche, slope protection, culverts, and swale projects in Novato, San Rafael, Petaluma, Sonoma, Napa, Vacaville, Green Valley and other surrouding north-bay cities, where movement of water and resistance to erosion are critical. With a natural blend of gray, slate, and tan hues, it also blends well into the landscape for more natural-looking dry creek beds and infrastructure zones.
 
Available Sizes:
• 3-inch Drain Rock – Great for large drainage trenches, culvert bases, and slope stabilization
• 6-inch Drain Rock (4"x9" rip-rap) – Ideal for heavy-duty erosion control, ditch lining, and check dams
 
Common Applications:
• Drainage swales and culverts
• Erosion control on hillsides and embankments
• Dry creek beds and energy dissipation areas
• Retaining wall backfill and foundation drainage
• Roadside ditch protection and slope stabilization
 
Coverage Estimate (Per Ton):
• 3" Drain Rock – Covers approx. 60–70 sq. ft. at 4" depth
• 6" Drain Rock – Covers approx. 30–40 sq. ft. at 7" depth
(actual coverage may vary based on compaction and placement)
 
Delivery Service Area:
Bulk delivery available throughout Napa, Sonoma, Solano, Marin, and Contra Costa counties, including Napa, American Canyon, Vallejo, Fairfield, Benicia, Novato, Petaluma, and surrounding areas.