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Noosa Dog Beach Dredging and Nourishment Works

Updated: 8 hours ago

ICM was engaged by Noosa Shire Council to develop the constructability design and delivery approach for the Noosa Dog Beach Nourishment Project, focused on the western and southern sand plugs (tidal closures). The work established how the plugs could be built in active tidal conditions, what dredge productivity was required, and which construction methods would give the best chance of successful closure.



Project Details

  • Client: Noosa Shire Council

  • Date: 2023-2024

  • Location: Noosa River Spit, Queensland, Australia


About This Project

The Challenge

As part of the wider nourishment and reprofiling works at Dog Beach, sand plugs (tidal closures) were needed to redirect flows away from the eroding shoreline and back toward the main channel. During construction, the western and southern plug areas proved difficult to advance because tidal flows and sand losses were greater than the placement rate being achieved on site. Council required a practical, evidence-based approach to determine how the works could be delivered successfully under real site conditions.


The Solution

ICM developed a constructability-based design and methodology for delivery of the sand plugs using desktop assessment, site inspection, survey, empirical analysis, and comparison with previous successful closure works. The work considered channel conditions, tidal velocities, scour, dredge productivity, and expected sand losses to define minimum placement rates and practical sequencing. ICM then set out a delivery approach tailored to site conditions, including staged closure methodology, use of temporary construction plugs and beach stockpiles, combined vertical and horizontal placement, and timing of key activities to neap low tides.


The work gave Council and the Contractor a clear construction pathway for nourishment delivery, including realistic productivity targets and a methodology better matched to the hydrodynamic conditions at Dog Beach.


“Our role was to develop a construction approach that worked with the site conditions, not against them, so the nourishment works could be delivered efficiently and effectively.”

Services Provided

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