Service Area

Proudly serving:

Castle Rock
Longview & Kelso
Woodland & Kalama
Chehalis & Centralia
Greater Cowlitz, Lewis, and Clark Counties

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Need aggregates delivered promptly and accurately? Call (360) 957-8847 or

Get an estimate

Trusted Sand & Gravel Supplier in SW Washington

At Columbia Groundwork Inc., we supply premium sand, gravel, and aggregate materials to contractors, landscapers, and homeowners across Southwest Washington. Located in Castle Rock, WA, our inventory includes:

Drain rock, pit run gravel, pea gravel
River rock (large & medium), sand, chips, crushed asphalt
Landscaping boulders, topsoil, fill dirt, and more

What We Offer

Aggregate Materials for Every Project Need

We deliver high-quality materials ideal for:

Outdoor projects: driveways, walkways, patios
Site preparation: backfill, foundation support, retaining walls
Erosion control and drainage solutions
Landscaping accent pieces and hardscape bases

Why Choose Us?

Local in Castle Rock, WA, with deep knowledge of regional soil and climate

Licensed and insured—reliable delivery, every time
Competitive pricing with transparent quotes and flexible delivery options
Fully maintained fleet and equipment for efficient jobsite service

Built on Local Expertise

South West Washington’s unique alluvial soils and high-rainfall climate demand materials that will perform. Whether it’s crushed asphalt for erosion control near the Coweeman River or sand for proper drainage in Longview, we make sure materials not only arrive on time, but are engineered for longevity in our terrain.