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Max Allen Drive Stabilisation Works

Max Allen Drive Stabilisation Works

STATUS
Completed
CLIENT
Public Works
Australia
SERVICE
Roads & Bridges
VALUE
$2.5
Million
DESCRIPTION OF WORKS
The works involved stabilising approximately 160m of Max Allen Road and the adjoining northern embankment of the Lane Cove River, located immediately upstream of the Lane Cove Weir within Lane Cove National Park. They addressed subsidence and erosion by excavating unstable materials, installing micro-piles and retaining structures, placing engineered rock armouring, and using vegetated geogrid systems to reinforce the embankment and protect the riverbank. The road was regraded, compacted, and resurfaced to restore safe access for NPWS staff and visitors.
Drainage upgrades included subsoil drainage and energy-dissipating outlets to manage runoff and reduce erosion. Environmental controls such as floating silt curtains and sediment fencing were implemented, and disturbed areas were promptly revegetated with endemic species to enhance stability and minimise long-term environmental impacts.
KEY FEATURES
  • • Micro-piling for embankment stabilisation involved installing small-diameter piles to provide deep structural support with minimal ground disturbance.
  • • Low-impact riverbank protection used engineered rock armouring and vegetated geogrids to stabilise the Lane Cove River bank while supporting natural regeneration.
  • • Restricted access construction methodology utilised compact, low-ground-pressure equipment to operate within the narrow, sensitive park environment.
  • • Specialised sediment and erosion control deployed floating silt curtains in the river to contain sediment during works.
  • • On-site ecological monitoring ensured an ecologist supervised works to protect local flora, fauna, and threatened species habitat.
  • • Custom drainage design incorporated subsoil drainage and energy-dissipating outlets to reduce erosion during heavy rainfall.