Trusted on the largest mission-critical sites in the country
We build the ground the future stands on.
A nationwide, niche heavy-civil contractor. Centrally located, we go wherever our clients build, from data centers and energy to aviation, industrial, and environmental cleanup.
Kolb isn't just a grading contractor. We self-perform the whole site.
One accountable partner for sitework, utilities, earthwork, demolition, crushing, paving, stabilization, and environmental work. Headquartered in Missouri. Mobilized coast to coast.
What we self-perform
Services
Eight core services, all self-performed. From demolition and earthwork to utilities and paving, Kolb handles the full scope of heavy-civil sitework under one roof.
Site Development
Demolition & Blasting
Mission Critical
We build the digital frontier.
Every data center starts in the dirt. Kolb self-performs the site work behind hyperscale campuses, neo-cloud builds, and the facilities that power them.
Trusted by the world's leading hyperscalers
Why Kolb
The Kolb advantage
Self-perform everything
One accountable team across every major scope, fewer subs, tighter schedules, better control.
Certified & equipped
Environmental certifications, Helix Pier foundations, and a modern, tech-driven fleet.
Safety
first
A safety culture built for the scale and complexity of mission-critical sites.
Fast, reliable pay
Industry-leading days-payable. Vendors and partners choose to work with us because we pay quickly.
Where we work
Industries
From the markets we’ve served for decades to the three frontiers driving heavy-civil demand today.
Mission Critical
Hyperscale data centers, neoclouds, third-party providers
Commercial
Retail, office & institutional
Industrial
Concrete & industrial plants, manufacturing, processing
Energy
Power, oil, gas & renewables
Aviation
Runways & airfields
Transportation
Highways, airports & rail
Utilities & Infrastructure
Pipelines, water & power
Environmental
Remediation & cleanup
Recreation
Parks, trails & venues
Residential
Subdivisions & communities
Selected work
Projects
A snapshot of recent work. Each project: what it was, where, and the scope we self-performed.
Valley View Pipeline
Kolb Grading installed 50,000 linear feet of fusion-welded HDPE pipe for the Valley View Pipeline in Missouri. The route crosses...
Cottleville Trails
DCM Land selected Kolb Grading as a subcontractor to build out Cottleville Trails, a 300-acre master-planned development in Cottleville, Missouri....
Frankie Martin’s Garden
Cottleville Holdings selected Kolb Grading as general contractor to build Frankie Martin’s Garden, an outdoor entertainment and athletic venue on...
Labadie Power Plant Ash Pond Closure
Ameren Missouri awarded Kolb Grading the general contract to close both the bottom ash and fly ash ponds at the...
Taum Sauk RCC Test Pads
In December 2005, the upper reservoir at Ameren’s Taum Sauk pumped storage plant near Annapolis, Missouri, failed. Before the reservoir...
Vandalia Solar Farm
Kolb Grading was awarded site work as a subcontractor for the 68 MW Vandalia solar project in Pike County, Missouri,...
Split Rail Solar Farm
Kiewit selected Kolb Grading as a subcontractor for site work on the 300 MW Split Rail solar project in Warren...
Warrenton Hyperscale Data Center
Kolb Grading was awarded mass earthwork and soil stabilization for a greenfield hyperscale data center campus in Warrenton, Missouri, about...
Our Story
Family-owned. Built over generations.
People trust Kolb because they know where we came from, a family business that grew from local grading into a nationwide heavy-civil contractor without losing the values it started with.
1960
1987
1999
2022
Careers
Build Big Things.
Go where the work is.
From operators to project leadership, Kolb crews run the country’s most ambitious sites. Grow a career with a family-owned company that’s going places.
