What Dutra does

The Dutra Group is a privately held, family-owned heavy civil marine construction company headquartered in San Rafael, California, with roots in California Delta levee work dating to 1904 and a corporate history beginning in 1972. The company generates revenue through five integrated service lines: dredging (trailing suction hopper, clamshell, and maintenance), marine construction (wharves, piers, seawalls delivered via Design-Build, CMGC, and Progressive Design-Build), ecological restoration (added through the 2025 acquisition of Hanford ARC), barged aggregates and quarrying (San Rafael Rock Quarry with unique direct waterside access), and steel fabrication (Rio Vista shop). Its core technology platform is a specialized marine equipment fleet including the TSHD Stuyvesant (9,870 cubic yard hopper dredge — one of only two operating on the West Coast), Crane Barge Harry S (350-ton Liebherr HS 8300 HD), a fully electric crushing and screening plant (largest Gladiator-powered site in the world), and the TSHD Adele (10,464 cubic yard, delivery late 2028, the largest capital investment in company history). The Dutra Group sells primarily to federal, state, and local government agencies and port authorities, including the U.S. Army Corps of Engineers, Port of Long Beach, Port Canaveral, and California Delta reclamation districts, with projects bid competitively or through relationship-driven alternative procurement. The company markets itself as American-built, American-flagged, and American-crewed, leveraging Jones Act compliance, a 100+ year brand, and a safety record (TRIR, LTIR, EMR below national averages since 2018) as primary differentiators. Geographic reach is national across the U.S. with stated operations across the Pacific Rim.

Name

Dutra

Legal name

The Dutra Group

Website

https://dutragroup.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

101–250 employees

Short description

The Dutra Group is a family-owned heavy civil marine construction company based in San Rafael, California, providing dredging, marine construction, ecological restoration, and barged aggregates services to U.S. federal, state, and port authority clients nationwide.

Ownership category

akta.pro rank

Product category

Heavy Civil Marine Construction

NAICS

Geophysical Surveying and Mapping Services (541360), Marine Cargo Handling (488320), Ship Building and Repairing (336611)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Dredging & Channel Deepening (Capital & Maintenance) (IMAFAJAB)

akta.pro secondary industries

Port & Harbor Construction (Quays, Wharves, Berths) (IMAFAJAA), Sediment Remediation & Dredging (Capping, Removal, Confined Disposal) (EUAIALAG), Subsea & Nearshore Civil Works (Trenching, Rock Placement, Mattressing) (IMAFAJAI)

Keywords

• Heavy civil marine construction
• Trailing suction hopper dredging
• Port and harbor infrastructure
• Ecological restoration services
• Marine aggregates supply

Headquarters

HQ city

San Rafael

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Dredging Services: Trailing suction hopper dredging, clamshell dredging, and maintenance dredging for ports, harbors, and waterways. Includes beach nourishment, coastal restoration, and channel deepening projects.
2. Marine Construction: Heavy civil marine construction including wharf construction, pier extensions, seawall projects, and maritime infrastructure development. Often delivered through alternative procurement methods like Design-Build and Progressive Design-Build.
3. Ecological Restoration: Ecological restoration and wetland mitigation services through Hanford ARC subsidiary, including stream construction, soil bioengineering, revegetation, and habitat restoration.
4. Barged Materials/Aggregates: Production, delivery, and placement of rock products through San Rafael Rock Quarry. Provides construction aggregates to clients across the nation with direct waterside access.
5. Fabrication Services: Steel fabrication through Rio Vista shop for vessel maintenance and new equipment builds.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

The Dutra Group is a heavy civil marine construction company that delivers dredging, marine construction, ecological restoration, and barged materials services to government agencies and port authorities. It operates an American-built, American-flagged Jones Act-compliant fleet of trailing suction hopper dredges, crane barges, and supporting equipment, supported by a vertically integrated rock quarry for aggregate supply. Its projects include channel deepening, beach nourishment, port expansion, pier and wharf construction, seawall installation, and wetland mitigation across the U.S. and the Pacific Rim.

Product overview

The Dutra Group is a heavy civil marine construction company offering an integrated portfolio of dredging, marine construction, ecological restoration, and barged materials services. Their core equipment fleet includes trailing suction hopper dredges (TSHD Adele and TSHD Stuyvesant), crane barges (Harry S), and the San Rafael Rock Quarry for aggregate materials. The company operates nationally in the U.S. and across the Pacific Rim, serving ports, waterways, and coastal infrastructure markets.

Differentiator

Problem solved

Functional benefit

Brands

• San Rafael Rock Quarry, Inc. Aggregates and barged materials division

Products and services

• Dredging Services Heavy civil marine dredging operations including coastal restoration, storm recovery, beach nourishment, and maintenance and capital deepening projects for ports, harbors, and waterways. Sold to government agencies and port authorities through competitive bidding.
• Marine Construction Heavy civil marine construction services including pier construction, wharf extensions, seawall projects, and port infrastructure development, often delivered through Design-Build, Progressive Design-Build, and CMGC procurement methods.
• Ecological Restoration Ecological restoration and wetland mitigation services provided through the Hanford ARC subsidiary, including stream construction, soil bioengineering, revegetation, park construction, and erosion control for environmental agencies and developers.
• Barged Materials (San Rafael Rock Quarry) Production, sale, and barged delivery of aggregate rock products from the San Rafael Rock Quarry to construction clients nationwide, leveraging direct waterside access for marine loading.
• Steel Fabrication Steel fabrication services from the Rio Vista fabrication shop supporting vessel maintenance and new equipment builds for the Dutra fleet and external clients.
• TSHD Stuyvesant 9,870 cubic yard trailing suction hopper dredge serving U.S. essential waterways under Dutra's ownership; one of only two hopper dredges operating on the West Coast.
• TSHD Stuyvesant (Dredging Asset) 9,870 cubic yard trailing suction hopper dredge acquired in 2012, operating on the West Coast and throughout the United States.
• Crane Barge Harry S The largest crane barge in Dutra's fleet, featuring a modified 350-ton Liebherr HS 8300 HD duty-cycle crane with Pactronic accumulator system; has 10% more capacity than the predecessor Paula Lee and uses approximately half the fuel load.
• Crane Barge Harry S (Asset) Largest crane barge in the fleet with 350-ton Liebherr HS 8300 HD crane (upgraded from standard 300 tons), Pactronic accumulator system, tier-compliant engine, wireless bluetooth/wifi connectivity, and latest navigational aids.
• Electric-Powered Crushing and Screening Plant Fully electrified mobile crushing and screening operation at the San Rafael Rock Quarry, including two MT1300 cone crushing plants, two H8203 screening plants, one H6203 screening plant, and 11 conveyors; the largest Gladiator-powered site in the world.
• Liebherr e8300 Electric Duty Cycle Dredge Electric-powered duty cycle dredge based on the Liebherr 8300 with electric motors replacing internal combustion engines, capable of connecting to shore-side substations or operating on diesel generators to meet project and environmental requirements.
• TSHD Adele 10,464 cubic yard (8,000 m³) Beagle 10.2 Mk2 trailing suction hopper dredge with advanced automation, modular design for future upgrades, V-shaped hopper cross-section, single row bottom doors, bow connection for shoreline pump-off, and bulbous bow; American-built, American-flagged, American-crewed.

Quantifiable outcome

• 35% fewer injuries in 2025 compared to 2024
• +2 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Eastern Shipbuilding GroupcoreStrategic or Co-development Partner · 20 March 2025Contracted to build the 10,464 cubic yard trailing suction hopper dredge Adele at Eastern's Allanton and Port St. Joe, Florida facilities. Construction scheduled for completion in late 2028. Eastern is described as the most experienced builder of dredges in the U.S.
• Royal IHCcoreTechnology or IntegrationRoyal IHC designed the Beagle Mk2 vessel (Adele) for The Dutra Group. Provides advanced design capabilities, state-of-the-art dredging equipment, automation, and environmental awareness. The IHC Beagle Mk2 is a twin-screw trailing suction hopper dredge.
• Griffith CompanycoreStrategic or Co-development PartnerHistoric joint venture partner for the Pier G South Slip Fill project at the Port of Long Beach, representing Dutra's largest contract to date.
• International Transportation Service (ITS)coreStrategic or Co-development PartnerJoint venture partner with Griffith Company and Dutra for the Pier G South Slip Fill, New Wharf at Berth 234, and Backland Development Project at the Port of Long Beach.
• LiebherrcoreTechnology or IntegrationEquipment provider for crane barges including custom modifications to HS 8300 HD crane (increased to 350-ton capacity). Also partnered for electric e8300 duty cycle dredge development. Manufacturer based in Nenzing, Austria.
• GHDminorImplementation/ SI/ Consulting PartnerArchitecture partner alongside Dutra for Cal Poly Maritime Boat Basin and Pier Extension Project design-build contract.
• Hanford ARCcoreStrategic or Co-development PartnerAcquired in 2025 as wholly-owned subsidiary. General engineering and landscape contractor specializing in ecological restoration and heavy civil construction in environmentally sensitive resource areas.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Manson Construction Co. Heavy marine contractor with dredging, wharf construction, and pile driving capabilities, with strong West Coast and Gulf presence. Competes with Dutra on Pacific marine construction and dredging tenders.
• Orion Group Holdings: Houston-based marine specialty contractor offering dredging, marine construction, and environmental services. Direct competitor to Dutra on heavy civil marine infrastructure for ports, waterways, and coastal projects.
• Great Lakes Dredging & Dock Corporation: Largest U.S. dredging contractor and the closest direct comparable. Operates the biggest hopper dredge fleet in the country, serves U.S. Army Corps of Engineers and port authorities, and competes head-to-head with Dutra on capital and maintenance dredging, beach nourishment, and coastal restoration bids.
• Cashman Dredging & Marine Contracting: Family-owned East Coast dredging and marine construction firm with clamshell and hopper dredging capabilities. Direct peer competing for U.S. Army Corps of Engineers work and port deepening contracts in the same bidding markets.
• Weeks Marine: Major East Coast marine construction and dredging contractor serving U.S. Army Corps of Engineers and port authorities on harbor deepening, beach nourishment, and heavy marine infrastructure. Overlaps substantially with Dutra's marine construction and dredging service lines.

Broad incumbents

• Tetra Tech: Large engineering and environmental services firm supporting coastal restoration, ecological mitigation, and waterway infrastructure design. Adjacent incumbent whose environmental and design capabilities overlap with Dutra's Hanford ARC ecological restoration work.

Others

• Eastern Shipbuilding Group: U.S. shipyard contracted to build Dutra's TSHD Adele. Partnered contractor on Dutra's flagship capital project and indicative of the limited U.S. shipyard capacity for hopper dredge construction.
• Royal IHC: Dutch shipbuilder and dredge designer of the Beagle Mk2 platform (basis for Dutra's TSHD Adele). Functions as technology/equipment partner rather than competitor, but is the most relevant comparable for dredge vessel design and build economics.

Emerging players

• Mike Hooks, LLC: Dredging contractor operating one of the largest privately held fleets of pipeline and hydraulic dredges. Competes with Dutra on maintenance and capital dredging projects in Gulf and inland waterway markets.
• Callan Marine: Gulf-based dredging and marine construction specialist operating clamshell and hydraulic dredges. Emerging player overlapping with Dutra on U.S. Army Corps of Engineers hopper and clamshell dredging opportunities.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/dutragroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dutra