On 1 July 2026, the NSW Government announced Seymour Whyte as the successful contractor to deliver a new, more durable crossing at Mitchells Causeway following the closure of the Great Western Highway at Victoria Pass.
Following an accelerated procurement process, Seymour Whyte has been selected to construct a new crossing that will restore the connection between the Blue Mountains and Central West while improving its long-term resilience.
Extensive geotechnical investigations carried out over recent months were critical to the procurement process, providing the evidence needed to develop the safest and fastest solution for reopening the road.
The investigations confirmed the bedrock beneath Mitchells Causeway remains stable, enabling a design that builds on the existing crossing rather than replacing it entirely.
The new crossing will feature a bridge structure built over the existing Mitchells Causeway, supported by deep piles anchored into the stable bedrock below. The new structure will sit above, but independently of, the convict-built causeway, which will also be stabilised as part of the works.
While the priority is restoring this vital transport link as quickly and safely as possible, the new crossing has also been designed to meet the region’s future needs. It will be capable of accommodating an additional lane in the future, something that was not possible with the existing roadway.
Major construction is expected to begin in July 2026, with specialist engineering and construction teams undertaking drilling, grouting and heavy piling activities to establish the deep foundations that will support a new, reliable and resilient crossing.
NSW Transport Secretary, Josh Murray said:
“I’d like to acknowledge the construction and engineering industry for embracing a new, faster way of working. Their expertise and willingness to collaborate has enabled us to move quickly while undertaking the rigorous investigations and planning needed to get this right.
The NSW Government has also announced an expanded support package for communities and businesses affected by the road closure.
The road is expected to reopen in the second quarter of 2027.
