Durban Port

Durban Port

HARBOUR ENTRANCE WIDENING AND DEEPENING

Planning, Feasibility, Design and Construction Supervision

Prestedge Retief Dresner Wijnberg were appointed in October 2002 by Transnet Limited / Transnet National Ports Authority to undertake a feasibility study for the widening and deepening of Durban Harbour’s entrance channel.  PRDW’s appointment was extended in February 2006 to carry out the detailed design and supervision of construction.

The primary objective of the project is to provide the Port of Durban with a new entrance channel which allows for the safe access of all vessels up to an equivalent size of a 9 200 TEU (twenty-foot equivalent) container ship (Length=350m, Beam Width= 45.6m and Draft=14.5m) under most weather conditions.
 
The design of the new entrance required consideration of a number of functional and port operational requirements.  The primary functional requirements included navigational safety for vessels using the channel and a high degree of availability for all vessels up to, and including, the design ship. 

These requirements were to be met without inducing additional sedimentation of the channel, minimizing the adverse impact of increased wave energy on the adjacent Bluff and Point berths, and maintained within the available land, utility and environmental constraints.  In addition, the design was required to allow shipping traffic into the port during construction on a 24 hour basis without undue congestion.

The main design components for the project included the design of the:
 
>  Channel dimensions of the new entrance channel
>  New north groyne
>  Reinforcement of the south breakwater
>  Revetment construction
>  Dredging and demolition works