At Columbia Groundwork Inc., we supply premium sand, gravel, and aggregate materials to contractors, landscapers, and homeowners across Cowlitz County. 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
Whether you're working on a driveway, foundation prep, or landscaping upgrade, we help you choose the right materials for long-term performance.
Aggregate Materials for Every Project
- Outdoor projects: driveways, walkways, patios
- Site preparation: backfill, foundation support, retaining walls
- Erosion control and drainage solutions
- Landscaping accent pieces and hardscape bases
Choosing the Right Gravel for a Driveway
The best gravel for a driveway is usually a crushed rock with fines in it, often called 3/4 minus or 5/8 minus, because the sharp edges and dust let it pack into a hard, stable surface instead of shifting under your tires. Rounded rock like pea gravel looks good but rolls and scatters, so it suits paths and drainage better than a driveway you use every day.
For a new gravel driveway we usually set a pit run or larger rock base first, then top it with a compacted minus so it holds up to traffic and our wet Cowlitz County winters. Tell us your ground and how the driveway gets used, and we will spec the material that lasts.
Why Choose Us?
- Local in Castle Rock, WA, with deep knowledge of regional soil and climate
- Licensed and insured, reliable delivery every time
- Transparent quotes and flexible delivery options
- Fully maintained fleet and equipment for efficient jobsite service
Built on Local Expertise
Southwest Washington's alluvial soils and high rainfall demand materials that perform. Whether it's crushed asphalt for erosion control near the Coweeman River or sand for proper drainage in Longview, we make sure materials arrive on time and are suited for our terrain.
We account for compaction, load-bearing capacity, and how each material holds up in wet conditions. Selecting and placing the right materials from the start helps prevent settling, washouts, and costly rework, keeping your project stable and built to last.
Service Area
Castle Rock, Longview, Kelso, Woodland, and Kalama, all of Cowlitz County.
Frequently Asked Questions
What is the best gravel for a driveway?
For most driveways, a crushed rock with fines (often called 3/4 minus or 5/8 minus) is the best choice, because it compacts into a hard, stable surface. Rounded rock like pea gravel scatters under tires and is better suited to paths and drainage. We match the material to your soil and how the driveway is used.
What's the difference between pit run and crushed rock?
Pit run is unprocessed material straight from the pit, a mix of sizes that makes an economical base or fill. Crushed rock has been run through a crusher to a consistent size, so it packs tighter and finishes cleaner on top. Many driveways use both: pit run below, crushed rock on top.
Do you deliver, or is it pickup only?
We deliver throughout Cowlitz County: Castle Rock, Longview, Kelso, Woodland, and Kalama. Tell us the material and where it goes and we bring it to your site.
Is material priced by the ton or the yard?
Material is sold by the ton off a certified scale, but most customers order in yards because that is how they picture the pile. Tell us the yards you are after and we will sort out the tonnage. Weight per yard changes by material and moisture, so we confirm it at the scale rather than a fixed chart.
Request Your Materials Quote
Need aggregates delivered promptly and accurately? Call (360) 957-8847.
Get An Estimate