Project record

Princess Elisabeth Island caisson perimeter and reclamation

Participation
Not assessed
Project facts checked

TM EDISON reports all 23 caissons installed offshore; sand reclamation and electrical delivery remain separate subsequent stages

Project sources

Princess Elisabeth Island's marine civil package has reached an installed offshore perimeter. The 20 August contractor release reports the final caisson in position for Elia, following completion of the last unit at the Vlissingen yard in January. Further island filling and high-voltage delivery remain ahead.

Princess Elisabeth Island marine-to-electrical interface graphic linking the caisson perimeter, sand reclamation, platform handover and future electrical commissioning

Graphic: IMWO, based on Elia, DEME and Jan De Nul records; interface schematic, not a site survey or construction photograph

Location

Belgium / Europe

Segment

Offshore energy

Phase

Construction / Confirmed

Last checked

20 August 2026

Coverage

Related sectors

Offshore energy 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
Elia Transmission Belgium
Delivery parties
TM EDISON - joint venture of DEME and Jan De Nul, island EPCI contractor
Contract route
Elia's February 2023 award covers island engineering, procurement, construction and installation. High-voltage infrastructure was identified as a separate later contracting stage; the foundation milestone is not an electrical-package award or commissioning notice.
Execution window
Jan De Nul's August programme puts mainland cable connections in 2027-2028, electrical infrastructure installation from 2029 and final completion in 2031. Those remain announced future stages, not accepted achieved work.
Works package
A concrete caisson perimeter followed by sand reclamation to form the island. The original owner scheme includes marine maintenance access. This marine civil record does not establish accepted platform levels or energised electrical assets.
Marine interfaces
The caisson ring contains the reclamation works and provides the boundary for a future equipment platform. Fill suitability, placement sequence, drainage, geometry, access and handover requirements connect marine construction to electrical installation.
Commercial evidence boundary
The principal marine EPCI team is named. Neither the August installation announcement nor the January yard milestone provides a final account or accepted reclamation quantity. Earlier funding and project estimates cannot be treated as this stage's certified contract price.

Contract and delivery chain

Work packages and named roles

Published scope, named parties and supporting evidence for each workstream.

Marine foundations

Caisson perimeter

Named party
TM EDISON
Evidence status
Confirmed
Source position
The 20 August contractor announcement reports installation of the final foundation element. Source
Yard production

Final caisson construction and flotation

Named party
TM EDISON
Evidence status
Confirmed
Source position
January's report describes fabrication and flotation at Vlissingen, with offshore works still to follow. Source
Platform interface

Sand fill and civil handover

Named party
Marine and electrical delivery parties
Evidence status
Reported
Source position
Sand reclamation follows the installed perimeter; cited records do not establish accepted platform or electrical readiness. Source

Evidence gap

What remains unverified

Outstanding evidence

  • Sand placement and platform handover criteria
  • Foundation geometry and integrity acceptance
  • Marine access during electrical construction
  • Cable and electrical-package delivery against the revised programme

Related records 3

Reporting status

Project phase
Construction
Evidence confidence
Confirmed
Last checked
20 August 2026
Cited sources
4

Sources and related records

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Source collections

Project sources 4