The upgrade of Henry Road and Dohles Rocks Road in Griffin successfully improved flood immunity and enhanced overall traffic and pedestrian safety. The project involved constructing a new signalised intersection at Dohles Rocks Road and Henry Road, upgrading access to the proposed Griffin Sports Complex near Elizabeth Road, creating dedicated bus turnaround areas, and implementing various safety and flood improvements. Key works included raising road levels and constructing culverts to mitigate flooding risks, improving the road surface, and installing traffic signals to optimise traffic flow.

Scope of Works:

• Rehabilitation and widening of existing pavement.
• Construction of new traffic medians, line marking, and road furniture.
• Installation of traffic signals and a signalised pedestrian crossing.
• Comprehensive stormwater drainage upgrades, including soft soil improvement and surcharge embankments with monitoring.
• Replacement of soft soil and treatment/removal of unsuitable materials, including acid sulfate soils.
• Construction of approximately 420 linear metres of stormwater box culverts (ranging from 600x300mm to 2700x900mm).
• Installation of 1500m of subsoil drainage.
• A mix of cast in-situ and precast headwalls and bases.
• Development of new concrete pathways, kerb ramps, bicycle ramps, and driveways.
• Upgrades to street lighting, landscaping, wayfinding signage, and green infrastructure.

Key Outcomes:

• Significant flood immunity improvements through road elevation adjustments and extensive drainage enhancements.
• Improved connectivity and safety with the addition of cycling lanes, concrete footpaths, and a formalised school bus stop.
• Sustainable outcomes achieved with the integration of green infrastructure and landscaping.