Land Slip Remediation

DEKACON was engaged by National Parks and Wildlife Services (NPWS) to rectify a highly visible landslip at the scenic tourist lookout of The Three Sisters Track at Broken Head.

This work was important to ensure the integrity of the walking track situated above the slip. Due to limited access, the project involved Heli lifting in all plant, equipment and materials whilst ensuring controls were in place to manage tourists / public access.

The work encompassed:

Heli lifting plant and materials to site (including excavator) with sensitivity and controls in place to avoid disruption to sacred site
Excavation of slipped material reused below slip toe for rehabilitation of surrounding vegetation
Installation of gabion cages to retain slipped material and ensure integrity of footpath above slip location
Installation of permanent silt barriers made from hardwood sleepers to prevent future scouring / erosion of the site
Reinstate handrails and signage along top of gabion wall to maintain safety to public
Revegetate surrounding area to enhance integrity of material and reinstate aesthetic value of the location

Testimonials

"DEKACON was engaged via selective tender to deliver remediation works on the Three Sisters Walking Track in Broken Head Nature Reserve, following a significant landslip from the March 2022 flood event. The site was highly sensitive, with a nearby Aboriginal Cultural Heritage site and a Threatened Ecological Community, requiring strict environmental and cultural protection measures.

The scope involved stabilisation of the slip and reconstruction of the walking track in line with engineering designs. With limited site access, materials and machinery were delivered via helicopter across 11 lift days. DEKACON worked closely with NPWS to ensure safe, efficient aerial operations and maintained a tightly controlled worksite within the approved footprint.

Throughout the nine-week project, DEKACON delivered high-quality work while meeting safety, environmental, and engineering expectations. Their collaborative approach and professionalism ensured successful outcomes, with no further damage to the site even after Tropical Cyclone Alfred".

Molly O’Neill

Project Officer, NSW National Parks and Wildlife Service

Land Slip Remediation

Testimonials

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