Project record

Jurien Bay Boat Harbour entrance reconfiguration

Participation
Not assessed
Project facts checked

April maintenance dredging complete; 170m northern breakwater extension in detailed design, with construction tender to follow

Project sources

Jurien Bay's proposed entrance reconfiguration adds 170 metres to the northern breakwater to divert seagrass wrack before it enters the harbour. The transport department's 17 August 2026 position places the structural works in detailed design and confirms maintenance dredging completed in April. Construction procurement and a measured operating benefit remain ahead.

Jurien Bay wrack-management process linking seagrass ingress, decomposition and oxygen decline, with the proposed 170m breakwater extension as an entrance intervention

Graphic: IMWO, based on Transport WA records; wrack-management schematic, not a scaled harbour layout or construction photograph

Location

Australia / Asia Pacific

Segment

Ports and coastal protection

Phase

Design / Confirmed

Last checked

17 August 2026

Coverage

Related sectors

Ports and coastal protection 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
Department of Transport and Major Infrastructure, Western Australia
Delivery parties
Construction contractor - not named in the cited August 2026 position, Design delivery - in progress; external designer not identified in the cited records
Contract route
Construction request for tenders was to follow detailed design in the 17 August 2026 update. The 2024 announcement's expectation of design and construction awards in 2025 is an earlier programme statement; the cited August position names no construction award.
Execution window
April 2026 maintenance dredging is reported complete. A September 2025 parliamentary answer expected detailed design by the end of 2025, while the August 2026 update still describes design in progress. No revised construction start or completion date is provided.
Works package
A proposed 170m extension to the northern breakwater forms a spur groyne. The concept uses truck-delivered rock and earthmoving plant; final rock quantities, contract packaging and tender price are absent from the cited historical record.
Marine interfaces
Wrack decomposition reduces oxygen and can cause odour and fish kills. Entrance geometry is intended to redirect incoming material, with possible periodic accumulation on the northern beach. Harbour access, beach management and future maintenance therefore remain linked.
Commercial evidence boundary
The May 2024 release announced AUD 17.5 million; the September 2025 parliamentary answer stated an approved budget of AUD 17.047 million. The documents disclose no reconciliation between those figures or August 2026 contract value. Local rock and contractor opportunities were anticipated in the 2024 announcement, without named awarded lower tiers.

Contract and delivery chain

Work packages and named roles

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

Entrance design

170m northern breakwater extension

Named party
Transport WA
Evidence status
Confirmed
Source position
The 17 August 2026 update describes detailed design in progress and a construction tender to follow. Source
Maintenance

Harbour navigation and water-quality dredging

Named party
Transport WA
Evidence status
Confirmed
Source position
The owner reports the most recent maintenance dredging campaign completed in April 2026. Source
Performance

Wrack diversion and seasonal water quality

Named party
Transport WA
Evidence status
Reported
Source position
Approximately 80% diversion is a modelling result; the cited records contain no built-structure performance measurements. Source

Evidence gap

What remains unverified

Outstanding evidence

  • Construction tender, rock quantities and access arrangements
  • Updated design programme and current cost baseline
  • Northern-beach wrack management responsibilities
  • Post-construction wrack, oxygen and maintenance monitoring

Related records 2

Reporting status

Project phase
Design
Evidence confidence
Confirmed
Last checked
17 August 2026
Cited sources
4

Sources and related records

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Source collections

Project sources 4