Take a look at some of our most challenging and successful projects
Directional drilling pipe installation for EV charging stations at hotels, gas stations, and apartment complexes throughout Northern Colorado.
Completed horizontal directional drilling for 2-mile fiber optic cable installation through busy downtown Denver with zero surface disruption.
Year-long comprehensive recovery project including drilling pipe, setting fiber boxes, and pulling all fiber optic cables to restore critical infrastructure.
Two-month vacuum potholing project to safely locate and expose gas lines, power lines, and cable lines for utility mapping and infrastructure planning.
Non-destructive hydrovac excavation for utility location at Denver International Airport expansion project.
Join hundreds of satisfied clients who trust Onmark LLC for their underground construction needs.
Fully certified for all underground services
Available whenever you need us
Quality work guaranteed every time
Explore our completed projects showcasing excellence in directional drilling, excavation, and underground utility installations across Denver.
A selection of our most successful projects demonstrating our expertise and commitment to excellence
Complex directional drilling project for fiber optic and utility lines through busy downtown area with minimal disruption.
Large-scale excavation and trenching project for highway utility infrastructure with precision and efficiency.
Precision trenching and pipe installation through urban streets with careful attention to existing infrastructure.
Horizontal directional drilling for natural gas pipeline installation through residential areas with zero surface disruption.
Complete site preparation and utility installation for large commercial development project in metro Denver.
Non-destructive hydrovac excavation for utility location and verification in sensitive areas near existing infrastructure.
Complete telecommunications infrastructure installation including conduit systems and fiber optic networks for commercial developments.
Our commitment to excellence and customer satisfaction sets us apart
Over two decades of proven expertise in underground construction and directional drilling throughout the Denver metro area.
Latest technology and modern machinery ensuring efficient, precise, and safe completion of every project.
Fully licensed, bonded, and insured for your peace of mind on every project, large or small.
Around-the-clock availability for urgent projects and emergency situations. We're here when you need us.
Certified professionals with extensive training and experience in all aspects of underground construction.
We prioritize clear communication, transparency, and exceeding expectations on every single project.
Contact us today for a free consultation and quote. Our team is ready to bring your underground construction project to life with precision and professionalism.
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Explore our completed projects showcasing excellence in directional drilling, excavation, and underground utility services across Denver
From directional drilling to excavation, our experienced team is ready to bring your vision to life. Get your free consultation and quote today.
Discuss your project with our experts at no cost
Fast turnaround on all project estimates
Proven track record of successful projects
