Marine construction

Sizewell targets Q2 2027 bulk imports as jetty works advance offshore

Published 4 November 2026 Publisher IMWO Region Europe Confidence Confirmed
Sizewell bulk-import diagram connects the planned Wind jetty-head work and Canti-travel trestle to the berth, conveyor and shore receiving route

IMWO original construction and cargo-route diagram; sources: Sizewell C Harbour Authority Notice 29, owner works tracker and MMO amended marine licence.

Sizewell C expects its Marine Bulk Import Facility to become operational in the second quarter of 2027. The owner's works tracker reports that construction has advanced from the beach into the sea, with platform works continuing through the end of 2026. The facility will transfer bulk materials from vessels to the main construction site. April's site forum recorded Canti-travel piling in progress; the harbour's subsequent phase-two plan paired offshore jetty-head construction with an approach trestle advancing seaward from the mainland. [1][2][4]

Bulk-import construction reaches the sea

The works tracker gives the current operational forecast. Its April-December dates describe an activity window. The 15 April forum records earlier piling progress, and Notice 29 describes the planned July phase. The amended licence, effective 16 October 2025, supplies the structural scope, dredging ceilings and approval condition. [1][2][3][4]

Two workfronts meet at the cargo route

Notice to Mariners 29 scheduled phase two from around 2 July 2026 for approximately four months. It assigned the head to the self-propelled jack-up vessel Wind and the trestle to the Canti-travel process. Those workfronts form different parts of the same cargo route: a vessel needs a usable berth alongside the head, while discharged aggregate needs a continuous conveyor connection ashore. The October 2025 amended marine licence defines a pier carrying a covered conveyor and access road up to 468 m long and 12 m wide, a head approximately 50 m by 50 m, three berthing dolphins and two mooring dolphins. Their completion sequence determines when the vessel-to-site route can be commissioned. [2][3]

Evidence conclusion

Match the first cargo to the surveyed berth

Berth preparation also has a recurring limit. The amended licence allows a capital dredge of up to 11,675 m3 and maintenance dredging of up to 1,170 m3 per month in the berthing pocket. Condition 32 requires MMO approval of each dredging phase's dates, method, volume, depth and vessels before work begins. A cargo programme has to accommodate the time between the final dredge and the ship's arrival, when fresh shoaling can consume the available depth. If the surveyed recovery quantity exceeds the monthly allowance, the dredging plan and vessel timetable need revision. The facility team should link the first cargo nomination to a dated berth survey, the vessel's agreed operating draught, completed berthing arrangements and a loaded conveyor trial through to the site's receiving point. Holding those records against one arrival window exposes a berth, mechanical or shore-receiving constraint before a loaded vessel is committed. The Q2 2027 forecast supplies the planning window; the commissioning sequence determines the usable slot. [1][3]

Outstanding evidence

  • Dated head, trestle and conveyor completion and commissioning sequence
  • Approved dredging phase, final survey and maintenance allowance before each arrival
  • Vessel-specific operating draught, berthing arrangements and shore receiving capacity

Related records 1

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