Columbia Groundwork is a locally owned and operated excavation and construction company serving Cowlitz County. We specialize in commercial, heavy civil, and residential excavation, offering scalable solutions tailored to each client's needs, whether your project demands a full-size crew or a more focused team.
Columbia Structure is a sister company to Columbia Groundwork, also fully licensed in Washington State. Rooted in experience and craftsmanship, we're here to be more than just your contractor, we're your project partner.
Contractor of the Year 2025, Cowlitz County 811 Utilities Council, recognized for excavation skill and safety. NFIB member.
Our Services
- Excavation
- Land Reclamation
- Erosion Control
- Landscape Preparation
From rough grade to finished pad, our team brings the experience, equipment, and commitment to deliver results on time and on budget.
Our Fleet
Service truck, mini excavators, and the equipment behind them, maintained and ready in our own shop, not rented job by job.
Design & Permitting
We handle project design and permit acquisition in-house, so you don't have to juggle multiple companies to get your project off the ground. For engineering and geotechnical work, we coordinate with trusted outside partners as your project needs it. Either way, we keep the pre-construction phase efficient and stress-free.
Our Approach
At Columbia Groundwork, we believe in selectivity, not volume. We focus on projects where our experience and attention to detail make a real difference. Our ability to visualize terrain, grade challenges, and construction needs before ground is even broken lets us streamline timelines, control budgets, and deliver better outcomes.
Whether acting as a general contractor or subcontractor, our commitment stays the same: safety, quality, knowledge, and customer service, every project, every time.
Where We're From
Formerly based in Longview, Washington, Columbia Groundwork relocated to rural Castle Rock in 2023. We're proud to get back to our small community roots while continuing to serve Cowlitz County.