{"id":5306,"date":"2024-11-25T16:34:19","date_gmt":"2024-11-25T15:34:19","guid":{"rendered":"https:\/\/www.bradymarine.com.au\/?post_type=avada_portfolio&p=5306"},"modified":"2024-11-26T17:07:54","modified_gmt":"2024-11-26T16:07:54","slug":"kwinana-cooling-water-outfall","status":"publish","type":"avada_portfolio","link":"https:\/\/www.bradymarine.com.au\/offer-portfolio\/kwinana-cooling-water-outfall\/","title":{"rendered":"Kwinana Cooling Water Outfall"},"content":{"rendered":"

The Kwinana Gas-fired Power Station Project is a 320 MW combined-cycle<\/strong><\/p>\n<\/div>

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Gas fired power plant located at the Kwinana Industrial Estate 30 kilometres south of Perth, Western Australia.<\/strong><\/p>\n<\/div>

A key element of the new power station, the outfall comprised 320 m of 1.8m diameter concrete pipe, extending from a seal pit weir behind the sand dunes through the beach and into Cockburn Sound.\u00a0 The last 100 m of the pipeline included 21 diffuser ports in a constant water depth of 9 m.<\/p>\n

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Brady Marine & Civil were engaged as a single ECI contractor a year prior to the commencement of construction. Our contributions to the design and the preparation and submission of project plans to the authorities ensured that both elements reflected the intended method of construction, leading to a project which finished on time, below budget and to the complete satisfaction of all relevant stakeholders.<\/span><\/p>\n

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Construction was facilitated by a substantial temporary bridge structure along the full length of the pipeline giving safe, all-weather access for cranes and other construction equipment, delivery vehicles and personnel.<\/span><\/p>\n

An innovative method of \u201cleapfrogging\u201d a short length of cofferdam along the length of the pipeline was successfully used, providing less risk, cost benefits, better control and environmental benefits.\u00a0 The cofferdam completely contained any sedimentation associated with the pipeline excavation, an important requirement given the close proximity of the intake structure for the adjacent Perth desalination plant.<\/span><\/p>\n

The use of shoring minimised seabed disturbance, with an area of disturbance to the existing seabed no more than one fifth of what it would have been had the pipeline been laid in an open trench requiring rock armour protection on the resulting side batters. Completing the permanent works in short lengths also meant that only a small portion of works was exposed to storm damage at any given moment, thus addressing another substantial risk to the project.<\/span><\/p>\n

Key elements of the project scope included:<\/span><\/p>\n