Our Driveway Preparation Services
Excavation & Clearing
We remove topsoil, vegetation, and unsuitable soils to create a stable subgrade.
Grading & Slope Adjustment
Using laser/RTK equipment, we grade for level driveways or create slope for water runoff.
Base Rock Installation
we lay and compact high-quality gravel or crushed rock to form a strong driveway foundation.
Final Compaction & Surface Prep
Our crews compact the surface, leaving your driveway pad ready for gravel, asphalt, or concrete installation.
Frequently Asked Questions
How thick should the driveway base be?
Most gravel or asphalt driveways need 4–6 inches of compacted base rock. Concrete driveways may require up to 8–12 inches depending on soil conditions.
How long does driveway prep take?
A typical residential driveway takes 1–3 days depending on size, soil conditions, and weather.
Do you handle drainage?
Yes. We grade slopes, cut swales, and install culverts where needed to prevent water from damaging your driveway.
Why Choose Columbia Groundwork?
Local experience with Southwest Washington soils and drainage
Modern equipment for efficient excavation and compaction
Reliable scheduling for homeowners and contractors
Commitment to lasting results and customer satisfaction
Driveway Preparation Services in Southwest Washington
At Columbia Groundwork Inc., we provide complete driveway preparation services to ensure your gravel, asphalt, or concrete driveway is built on a strong, long-lasting foundation. From excavation and grading to compaction and base rock installation, our team delivers a driveway that stands up to traffic, weather, and time.
Why Proper Driveway Preparation Matters
A driveway is only as strong as the ground beneath it. Skipping proper prep leads to cracks, ruts, potholes, and drainage problems. Our process ensures your driveway is durable, attractive, and cost-effective:
Correct excavation depth and soil removal
Compaction to 95%+ density for stability
Installation of quality base rock
Precision grading for smooth finish and proper drainage
Materials & Driveway Types We Prepare
Gravel Driveways – cost-effective, durable, and easy to maintain
Asphalt Driveways – smooth, flexible, and ideal for heavy use
Concrete Driveways – long-lasting, strong, and clean finish
Service Area
We prepare driveways throughout:
Cowlitz County: Castle Rock, Longview, Kelso, Woodland, Kalama
Clark County: Ridgefield, La Center, Vancouver area
Lewis County: Toledo, Winlock, Chehalis, Centralia
Get a Free Driveway Preparation Estimate
Ready to build a driveway that lasts? Contact Columbia Groundwork Inc. today for a no-obligation quote.
📞 Call: (360) 957-8847
📧 Email: ryane@columbiagroundwork.com
📍 Office: P.O. Box 1855, Castle Rock, WA 98611
