NSW Coastal, Ocean and Port Engineering
Panel (COPEP) - Monthly Seminar
Coffs Harbour Eastern Breakwater Repair Design and Physical Model Testing
DATE & TIME
VENUE
Mon 20 April 2015
Light refreshments from
5:30pm for 6:00pm start
Engineers Australia Auditorium
Ground Floor, 8 Thomas Street,
Chatswood
COST
CPD
Members Free
Non-members Free
Eligible for 1.5 hours
Continuing Professional
Development
RSVP
Presentation by Nat Patterson (Haskoning Australia) and Indra Jayewardene (MHL)
The 550m long Coffs Harbour Eastern Breakwater was constructed in the early 1900's by end tipping rock
material directly on to the seabed. Being one of the most exposed breakwaters on the NSW coastline, the
ocean forces on the structure have meant numerous repairs and upgrades have been required over the
years. By 2012, the structure had deteriorated to a point where a major remediation campaign was
necessary to maintain the functional and structural integrity of the breakwater. In the presentation the
following will be discussed:
 the challenges faces by the designers and the asset owner (NSW Crown Lands) in designing
remedial works for a deteriorated structure in an exposed location;
 the complex interrelation between technical hydraulic design requirements, constructability and
economic constraints that drove the design process; and
 the use of complex computational wave modelling to determine the design conditions, and 3D
physical modelling to refine and validate the design.
Speaker: Nat Patterson, Haskoning Australia
Nat is a senior coastal engineer at Haskoning Australia with 15 years of experience in Australia and the UK
in design and construction of small and large scale coastal and maritime projects.
Speaker: Indra Jayewardene, Manly Hydraulics Laboratory
Indra is a senior engineer at Manly Hydraulics Laboratory with 35 years of experience in Sri Lanka,
Denmark, Maldives and Australia in data analysis, numerical and physical modelling of coastal processes.
He has authored over 30 publications in international journals and proceedings.
For further information contact Ben Modra, COPEP Secretary
Ph: 02 99490203; Email: [email protected]