Civil Construction

Water & Sewerage

Perfect Engineering completed many water and sewerage projects, especially with Sydney Water (NSW Government) and Broadspectrum (formerly Transfield). Below are two of the very critical projects that Perfect Engineering was approached to complete:

• Warragamba Dam pipeline: Perfect Engineering was responsible for the replacement of the old jet valve with the new jet valve. Perfect Engineering was also responsible for ensuring the correct fly ash levels in concrete and the appropriate levels of anchoring, as the constructed works would be under water and under certain stresses and loads. Inspection Test Plans, OHS and QA were an integral component of this project. Perfect Engineering completed the project successfully in a minimal period. The valve replacement is mentioned in this Sydney Morning Herald article.
• Five Dock Sewage pumping station: Perfect Engineering Sydney Water and Broadspectrum (formerly Transfield Services) engaged Perfect Engineering as the contractor for the Mechanical and Electrical Maintenance and Renewals Program (MEMRP). The service that Perfect Engineering has provided, was the complete execution and construction of the Emergency Pump Install at Five Dock Sewerage Pumping Station. The Sewerage Pumping Station at Five Dock has only 1.5 hours of retention time. Therefore, in the event that there is a power failure, a generator is required to aid in reducing or eliminating an overflow. The overflow is a hazard to the environment, and the main problem is that there is insufficient time to bring a generator to the site to prevent any overflow. The scope of work for Perfect Engineering was to install a permanent standby pump unit powered by gas that would activate in the case of power failure.
• Annandale Sewage pumping station: Perfect Engineering was responsible for the disconnection and removal of two existing dry well pump units and associated valve and pipework, and the installation of a new bypass connection. Works also included the design of structures pertaining to the wet well including pump and pipeworks, the design of jigs for abseilers to enter wet well regions to carry out works, design and the installation of new bypass connection including all pipework, bund, and valve modifications, and design of new safety grilles and hatch covers about wet well.
• Glenfield Sewage pumping station: Perfect Engineering was responsible for the design and construction of concrete foundations for a new heavy sludge conveyor, including excavation works and concrete works. Works also included the design and the installation of new mountings for sludge conveyor, and the design and construct a concrete structure to reinforce old concrete footings.
• Marrickville Sewage pumping station: Perfect Engineering was responsible for the redesign of an old concrete bund. Works also included the design and the installation of pipework and fittings for the emergency bypass connection.

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Some of the projects we have completed