The main marine works for the contract consisted of the construction of a 475m 800mmØ HDPE sea outfall pipeline as follows;
Key Features
- 115m pipeline within the beach foreshore constructed within a steel sheet piled cofferdam /open trench construction technique
- 360m pipeline within an intertidal and marine environment
- Construction of the 800mmØ HDPE pipeline into pipe strings up to 180m long using butt fusion welding to
- WIS-04-32-13
- Hydrostatic water testing of completed pipelines
- Construction / placement of hexagonal shaped RC concrete counterweights
- Installation of 4 leg sea outfall diffuser unit with steel frame protection units.
- 18,000m³ of dredging / backfilling
- Stone protection mattresses at diffuser unit
- Hydro graphic surveys of seabed pre/post construction