Custom Commercial Vessel Construction
Diversified Marine Incorporated (DMI) is a full-service commercial shipyard specializing in the design and construction of new vessels for maritime operators across the Pacific Northwest and beyond. From tugboats and push boats to fuel tankers and pilot boats, we engineer every vessel for the demanding conditions of West Coast waterways — on time, on spec, and built to last.
Located along the Columbia River in Portland, Oregon, DMI has been a trusted name in commercial shipbuilding for more than 40 years.
End-to-End New Vessel Construction
DMI manages every phase of your newbuild project in-house — from initial concept and naval architecture through steel fabrication, systems outfitting, regulatory approval, and sea trials. This integrated approach eliminates third-party handoffs, reduces risk, and keeps your project on schedule.
Our naval architects and marine engineers collaborate with you from day one to define your operational requirements, then use advanced design software to optimize your hull for fuel efficiency, stability, and maneuverability.
Commercial Vessels We Build
DMI constructs a wide range of commercial vessel types, including:
Tugboats & Push Boats — Engineered for high bollard pull and reliable performance in ship-assist and barge-handling operations.
Deck Barges, Hopper Barges & Specialty Barges — Built for heavy cargo transport, dredging support, or fully custom configurations.
Pilot Boats — Fast, seaworthy, and purpose-built for safe crew transfers in challenging harbor conditions.
Fuel Tankers & Workboats — Designed to current USCG and environmental regulations, with advanced tank systems and monitoring technology.
Why Choose DMI for Your Newbuild?
Quality construction, in-house. Our skilled welders, fabricators, and marine craftsmen handle all steelwork, piping, electrical, and mechanical systems on-site using high-grade materials and strict quality control at every stage.
Regulatory compliance, handled. Our project managers coordinate all USCG and ABS approvals and conduct full sea trials before delivery — so your vessel enters service ready to work.
Built for the long term. Because DMI also provides repair and retrofit services, every vessel we build is designed with maintainability in mind: accessible systems, standardized components, and comprehensive documentation.
Future-ready technology. We integrate hybrid and repower-ready propulsion systems, advanced navigation equipment, and ergonomic crew accommodations to help operators reduce fuel costs and meet evolving emissions standards.
The Long-Term Value of New Construction
Investing in a purpose-built vessel from DMI typically delivers a stronger return than continued repairs on aging hulls. A new vessel means optimal fuel economy, modern safety systems, and lower maintenance costs over a service life measured in decades — not years.
Whether you need a single specialized vessel or a complete fleet refresh, DMI delivers the craftsmanship and project management experience to bring your vision to life.
Start Your Newbuild Project
Ready to discuss your next commercial vessel? Contact our team for a no-obligation consultation. Let DMI’s 40+ years of West Coast shipbuilding expertise work for you.
