Our Drain Rock 3/4-inch or 1-1/2-inch Gravels —also known regionally as Clean Fill, Crushed Blue, Crushed Rock, or Blue Drain Rock — is a versatile, angular crushed stone perfect for a wide range of drainage and construction applications in Novato. Sourced locally from high-quality quarries, this gray-blue rock provides excellent compaction and superior water flow projects in Angwin, making it ideal for French drains construction in Napa, base layers installations in Fairfield, septic systems in Vacaville, mud control in San Rafael and behind retaining wall projects in Sonoma.
 
Whether you're a contractor prepping a jobsite in Vallejo or a homeowner tackling a landscape in Benicia or drainage project in Green Valley, area our drain rock delivers reliability and performance where it matters most.
 
Common Applications
3/4-Inch Drain Rock
French Drains & Trench Drains – Prevents soil infiltration while allowing maximum water flow.
Perimeter Drainage Around Foundations – Keeps basements, crawl spaces, and retaining walls dry.
Driveway & Pathway Base Layer – Adds stability and drainage beneath gravel or paver surfaces.
Backfilling Around Utility Lines – Provides protective bedding for pipes and conduits.
Landscaping Borders & Ground Cover – Enhances garden beds with a clean, finished look.
 
1-1/2-Inch Drain Rock
Large-Scale Drainage Fields – Ideal for septic systems, dry wells, and stormwater management.
Erosion Control on Slopes – Stabilizes soil in high-runoff areas.
Decorative Rock Features – Adds texture to dry creek beds, water features, and rock gardens.
Culvert & Ditch Lining – Protects against washouts and sediment buildup.
Heavy-Duty Base Applications – Used under roads, parking pads, and structural fills where drainage is critical.
 
Material Specs & Technical Notes
Material Type: Virgin, mechanically crushed, angular rock
Sizes Available: 3/4" (0.75") and 1-1/2" (1.50") nominal size
Processing: Screened for size consistency and washed to remove fines for maximum permeability
Color Range: Natural mix of grays, tans, browns and occasional whites
Bulk Density: ~1.35–1.45 tons per cubic yard (varies by moisture content)
Load Bearing Capacity: Excellent stability under load; resists compaction to maintain drainage voids
Gradation: Meets typical ASTM C33 specifications for coarse aggregates and Caltrans Section 68 standards for permeable material (verify per project requirements)
Applications Compliance: Commonly approved for drainage, backfill, and erosion control projects in residential, commercial, and municipal work
Packaging: Sold in bulk by the cubic yard or ton; local delivery available throughout Marin, Sonoma, Napa, and Solano counties
Maintenance: Minimal — occasional raking to remove debris may be required in exposed installations
 
Delivery Notes
Service Areas: We deliver directly to homes, job sites, and commercial locations across Marin, Sonoma, Napa, and Solano counties.
Delivery Methods: Bulk orders are transported in dump trucks.
Placement: Dumped on driveway, street frontage, or accessible work area — placement inside job sites depends on truck access and safety clearance.
Truck Access Requirements: Minimum 12 ft. width, 14 ft. height clearance, and a firm, level surface to prevent equipment damage.
Lead Times: Standard delivery within 1–3 business days; same-day or next-day service available in select areas.
Scheduling: Customers will be contacted prior to delivery to confirm drop location and time.
Weather Considerations: Delivery schedules may be adjusted during heavy rain to prevent washout or contamination of material.
Bulk Delivery Available
 
Frequently Asked Questions
Q: Which size should I choose — 3/4" drain rock or 1-1/2" drain rock?
A: Choose 3/4" for most French drains, driveway base layers, and backfilling around pipes. Use 1-1/2" for large drainage fields, erosion control, or decorative dry creek beds where a bolder look is desired.
 
Q: Is this drain rock clean and ready to use?
A: Yes — it is washed and screened to remove fines, ensuring maximum water flow and minimal clogging in drainage systems.
 
Q: Can I use drain rock for driveways?
A: Yes - it is primarily a drainage material, 3/4" drain rock can be used as a decorative driveway surface or base layer beneath other aggregates.
 
Q: How much drain rock do I need for my project?
A: A general rule is that 1 cubic yard covers ~100 sq. ft. at 3 inches deep. For precise needs, use our online Material Volume Calculator.
 
Q: Do you offer drain rock delivery to my city?
A: We deliver throughout Marin, Sonoma, Napa, and Solano counties. Enter your ZIP code at checkout to confirm delivery availability or call us.