Amphibious Excavators & Marsh Buggies
Built for dredging, wetlands, and the most demanding job sites — with Oshkosh 6x6 water trucks to match.
A specialty fleet for wetland, dredging & pipeline work.
O'Shea Equipment Company (OEC) is a specialty heavy equipment provider founded by Shamus O'Shea. We specialize in amphibious excavators — also known as marsh buggies or swamp buggies — for dredging, wetland construction, environmental remediation, pipeline, and civil projects across the United States.
Our fleet includes Caterpillar amphibious excavators (CAT 307E2, 312E, 330) outfitted with EIK long-reach booms, sticks, ditching buckets, and AM-series amphibious undercarriages. Based in Montgomery, Texas with units staged in Houston and Bryan, OEC ships nationwide.
Two categories, one job: get it done.
Purpose-built for the jobs standard equipment can't reach.
Dredging
Channel, canal, and pond material removal from the water.
Wetland Construction
Marsh creation and shoreline build-out on soft ground.
Environmental Remediation
Contaminated sediment and spoil handling in sensitive areas.
Pipeline Support
Right-of-way access, trenching, and mat work across wet terrain.
Civil Projects
Site prep, drainage, and earthwork for heavy civil builds.
Dust Suppression
4,000 gallon water trucks with cab-controlled spray heads.
Soil Compaction
Moisture conditioning for haul roads, pads, and subgrade.
Wildfire Response
6x6 water support and firebreak cutting on rough access.
Disaster Relief
Debris clearing and flood recovery where trucks can't reach.
Mining & Quarrying
Tailings pond work, haul road watering, and pit maintenance.
Pond & Canal Cleanout
Silt and vegetation removal from irrigation and retention systems.
Remote Site Support
Self-contained mobilization to sites with no improved access.
Discover the Perfect Tools for Your Project.
Talk with our team about availability, pricing, shipping, and custom configurations.