Location
Netherlands / Europe
Project record
Boskalis SEAWAY 31,000 m³ TSHD
- Participation
- Not assessed
- Project facts checked
In service; first project off Den Helder reported
SEAWAY's order, launch and shipyard handover now lead into a named operating location. Royal IHC handed the 31,000 m3 trailing suction hopper dredger to Boskalis on 20 July 2026 after sea trials. In its 20 August results, Boskalis reports that the vessel has entered service on a first project off Den Helder in the Netherlands. That advances the fleet record beyond construction, while the campaign's scope, quantities, acceptance and operating-fuel results remain separate reporting needs.
Segment
Dredging
Phase
Completed / Confirmed
Last checked
22 August 2026
Coverage
Related sectors
Dredging is the primary work classification. Related sectors connect this record to adjacent marine delivery and market coverage.
Subject index
Related subjects
These subject pages bring together related projects, technical articles, reports, and evidence methods.
Project anatomy
Contract scope and delivery roles
- Client / authority
- Boskalis
- Delivery parties
- Royal IHC
- Contract route
- Contractor-funded custom fleet investment. Royal IHC and Boskalis signed a letter of intent on 5 June 2023 after a co-design and engineering phase, and Boskalis announced the construction contract on 27 October 2023. Boskalis' 2025 results report EUR 564 million of group property, plant, and equipment investment and EUR 237 million of year-end capital commitments relating predominantly to completion of SEAWAY, Windpiper, and four Smit Lamnalco vessels; those aggregate figures do not disclose a SEAWAY contract value.
- Execution window
- The October 2025 launch was followed by final outfitting and sea trials. Royal IHC dates handover to 20 July 2026; Boskalis' 20 August account reports subsequent service entry off Den Helder. The exact mobilisation day and the first campaign's completion date are not specified in those releases.
- Works package
- One 178-metre-long, 38-metre-wide TSHD with a 31,000 m³ hopper, two trailing suction pipes with underwater pumps, two discharge pumps with a combined 15,000 kW, full diesel-electric installation, Azipods propulsion, an optimised hull, and advanced automation. Boskalis says the dual-fuel main engines, methanol plant, and storage tanks prepare the vessel to use biodiesel or methanol as alternatives to conventional fuel. The sources do not prove which fuel will be used at entry into service or publish achieved fuel, emissions, production, or discharge performance.
- Marine interfaces
- The vessel's large hopper and pump-ashore configuration support high-volume dredging and reclamation interfaces. A project assignment now exists at owner-report level, but its workability, material route, sailing cycle and survey acceptance must be established from campaign-specific records rather than extrapolated from design capacity.
- Commercial evidence boundary
- July delivery and August service entry are resolved milestones. Remaining commercial questions are first-campaign scope and acceptance, representative utilisation, operating-fuel costs, and whether measured production and emissions support the design objectives. Group capital commitments and group order-book stocks are not the vessel's contract value or its own workload.
Project timeline
Material developments
Dated events that changed scope, counterparties, delivery, commissioning or operating status.
Open this project in the Change LogOwner reports SEAWAY in service off Den Helder
Boskalis' half-year account identifies the first operating location, advancing the record beyond July handover. Campaign acceptance and measured performance are not reported.
SourceSEAWAY delivered to Boskalis
The shipyard's dated delivery record closes the construction and handover sequence. The record omits the first project, operating fuel and measured production and environmental performance.
SourceBoskalis still reported SEAWAY under construction
The owner identified SEAWAY as one of its largest 2025 investments and said year-end capital commitments related predominantly to its completion and other named fleet investments. This is a current construction and capital-completion signal, not delivery or service entry.
SourceSEAWAY was christened and launched at Royal IHC
The physical launch closed the hull-launch gate and exposed the named vessel, but Royal IHC explicitly placed final outfitting and extensive testing afterward and retained a future mid-2026 service-entry expectation.
SourceBoskalis converted the design phase into a construction contract
The owner confirmed Royal IHC, a 31,000 m³ hopper, the dredging and discharge arrangement, propulsion and fuel-preparation concept, build location, and intended mid-2026 service entry. The announcement did not disclose contract value or acceptance terms.
SourceRoyal IHC and Boskalis signed the construction letter of intent
The letter of intent followed joint design and engineering and established the intended 31,000 m³ custom-build route at Krimpen aan den IJssel. It preceded the later construction contract and was not itself delivery evidence.
SourceEvidence gap
What remains unverified
Outstanding evidence
- First Den Helder campaign scope, dates and owner acceptance
- Class, flag and current fleet particulars
- Representative dredging, discharge and reliability records
- Operating fuel, bunkering route and measured emissions
- Vessel-specific work windows rather than group order-book extrapolation
Reporting status
- Project phase
- Completed
- Evidence confidence
- Confirmed
- Last checked
- 22 August 2026
- Cited sources
- 6
Sources and related records
Project changes Methodology Email a correction Project tracker
Source collections
Project sources 6
- Boskalis half-year results 2026: SEAWAY service entry Boskalis, 20 August 2026
- IHC Dredging delivers 31,000 m³ TSHD SEAWAY to Boskalis Royal IHC, 21 July 2026; handover 20 July 2026
- Boskalis 2025 annual results Boskalis, 5 March 2026
- Launch of the SEAWAY Royal IHC, 3 October 2025
- Boskalis orders large 31,000 m³ TSHD from Royal IHC Boskalis, 27 October 2023
- Boskalis and Royal IHC sign LOI to build a new 31,000 m³ TSHD Royal IHC, 5 June 2023