IHD Engineering Awards submission - Fremantle Ports

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Mandatory Judging Criteria Criteria 6: Contribution to sustainable development The material to be dredged underwent extensive testing, showing that the sediments would not pose a risk to the environment or human health. Similarly excavated material was only reused for the Rous Head reclamation works after testing confirmed its suitability. The works were undertaken in compliance with projectspecific Environmental Management Plans addressing environmental risks specific to each component of construction activities. Weekly environmental inspections were performed and all incidents were recorded and followed up. Efficient use of natural resources while providing for beneficial use A strong emphasis was given to waste minimisation and material reuse. Total dredging volumes were minimised through detailed planning studies and temporary site facilities were designed and located to provide a longerterm benefit to future operations. Independent water quality monitoring was undertaken throughout the project beyond the requirements of the environmental approval conditions. The monitoring involved frequent water testing at more than 30 sites as well as regular aerial photography, seagrass and coral monitoring. About 480,000 tonnes of limestone and granite were used to construct a seawall extension at Rous Head. Some of the rock was reused from an existing seawall. Rock grading was carefully specified to maximise quarry yields and reduce waste. Dredge material from the deepening, material stockpiled at Rous Head from previous dredging campaigns and excavated material from the berth works were used to create 27 hectares of land for port purposes. Dredged material was placed hydraulically to avoid the need to import engineered fill and to limit the amount of fill requiring energy intensive soil improvement works. A design modification to the berth works reduced the diameter and thickness of piles used to allow for local manufacture. This reduced the tonnage of steel required as well as transportation distances. Using precast concrete elements also allowed for the combined steel and timber moulds to be reused.
FREMANTLE PORTS Recyling Thousands of tonnes of steel and concrete from the Berth 10 demolition and reconstruction, including replacement of fendering, were recycled. Maintaining environmental integrity Dredging and reclamation activities had the greatest potential to impact on environmental integrity but careful planning and use of latest technology and best practice methodologies ensured impacts were significantly less than predicted. This included building a fully enclosed seawall in preparation for reclamation, lining the seawall with geotextile material to contain fine sediment particles and the use of silt curtains around the overflow water pipes. In undertaking the berth works, appropriate containment methods were used to ensure no contaminants or demolition material could enter seawater or surrounds Silt curtaining was deployed along the berth face to contain any potential debris. To prevent pollution of the harbour, a wet vacuuming system was used during all saw cutting of concrete decks. 2011 <strong>Engineering</strong> Excellence <strong>Awards</strong> l Infrastructure and Building Category l Page 17
Page 1 and 2: Inner Harbour Deepening, Rous Head
Page 3 and 4: FREMANTLE PORTS Executive Summary T
Page 5: FREMANTLE PORTS Mandatory Judging C
Page 8 and 9: Safety of diving teams and the mari
Page 10 and 11: Mandatory Judging Criteria Criteria
Page 12 and 13: Also unique to the project was the
Page 14 and 15: Value adding, export potential As a
Page 18 and 19: Mandatory Judging Criteria Criteria
Page 20 and 21: Optional Judging Criteria Criteria
Page 22 and 23: Inner H 9m 11m 13m 14.7m Factsheet:
Page 24 and 25: In the construction of the seawall
Page 26 and 27: Optional Judging Criteria Criteria
Page 28 and 29: Inner Harbour Deepening and Berth W
Page 30 and 31: Background Fremantle Ports Dredg
Page 32 and 33: Dissemination of the results Di
Page 34: Minister for Environment. It is

IHD Engineering Awards submission - Fremantle Ports

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