Dredging
Maintain ponds, lakes, canals, rivers, and waterways with equipment specifically designed for working in saturated conditions.
Amphibious Excavators & Marsh Buggies
Built for the toughest terrain.
When conventional excavators reach their limits, amphibious excavators keep working.
At O'Shea Equipment Company, we specialize in Caterpillar Amphibious Excavators—commonly known as Marsh Buggies or Swamp Buggies—designed to operate in wetlands, marshes, shallow water, and other challenging environments where traditional excavators simply can't go.
Our machines combine the proven reliability of Caterpillar excavators with premium amphibious undercarriages, long-reach front equipment, and specialized attachments—giving contractors the reach, flotation, and stability needed for the toughest projects.
Why Amphibious
Access where others can't.
Amphibious excavators are engineered for low-ground-pressure applications where conventional tracked excavators become ineffective or inaccessible. When your project demands access to wetlands, marshes, ponds, canals, or soft ground, an amphibious excavator is often the safest and most productive solution.
- Low Ground Pressure
- Excellent Flotation
- Long Reach Capabilities
- Superior Stability
- Increased Jobsite Accessibility
- Reduced Environmental Impact
- Higher Productivity in Difficult Terrain
Our Fleet
Late-model Caterpillar, professionally configured.
Models
CAT 305.5CAT 307CAT 312CAT 320CAT 330
Configurations
- EIK Amphibious Undercarriages
- HAWK Long Reach Systems
- EIK Long Reach Systems
- Long Reach Booms & Sticks
- Wide Duty Buckets
- Mulching Attachments
- Tool Control Systems
Applications
Where these machines earn their keep.
Wetland Restoration
Complete environmentally sensitive projects while minimizing ground disturbance and maximizing productivity.
Pipeline Construction
Access remote rights-of-way, marshes, and soft ground where conventional equipment cannot safely operate.
Flood Control & Canal Maintenance
Support flood control infrastructure by maintaining drainage canals, retention ponds, levees, and waterways.
Environmental Remediation
Ideal for habitat restoration, shoreline stabilization, sediment removal, and environmental cleanup projects.
Vegetation Management
With specialized attachments such as the Denis Cimaf Mulcher, our equipment clears vegetation in wetlands and hard-to-access areas.
Why OEC
Equipment we'd be proud to run ourselves.
For founder Shamus O'Shea, heavy equipment has never been just a business—it has been a lifelong passion. Today, OEC focuses on providing high-quality specialty equipment backed by honest service, industry knowledge, and a genuine understanding of how these machines are used in the field.
We don't simply sell equipment—we help contractors find the right machine for the job.
Nationwide Service
Montgomery, TX to anywhere in the country.
Based in Montgomery, Texas, with equipment staged throughout the Houston area, O'Shea Equipment Company serves customers across the United States.
- Equipment Sales
- Nationwide Shipping
- Equipment Sourcing
- Custom Amphibious Builds
- Long Reach Configurations
- Project Consultation
Ready to go to work?
Whether you're looking for a late-model Caterpillar marsh buggy, a long-reach amphibious excavator, or a custom specialty machine, we have the experience and equipment to support your next project.