Australian Water Management Review Vol. 1 2014

Welltech Total Water Management Bypass Division Woolloongabba Project – Complete With the award of the Woolloongabba project to John Holland, it was identified that a major component to the success was the management of the existing sewer system whilst their tunneling and construction works took place. After successfully completing substantial bypass pumping on both the MMSR and NSP projects in Melbourne, Welltech were the logical choice for John Holland Tunnelling. Welltech is Australia’s leading Water Management company, the Bypass Division specialises in the successful pumping and bypassing of sewer and wastewater across the nation as well as internationally. Welltech’s Bypass division establishment has largely been advanced by an industry in dire need of a large scale specialised contractor with the capacity to manage flow rates in excess of 10,000L/sec. Being able to pump high flow rates is only the beginning, Welltech understands and embraces that in order to successfully carry out large scale Bypass operations, all details and possible scenarios must be identified and understood. Welltech’s Bypass Division ensures that each project component is considered, planned and executed using the most advanced equipment and practices to deliver incident free, completely controlled Bypass so lutions. Welltech’s research and development team constantly source and develop the latest equipment and technology available. Once identified the Bypass division employs this most up to date technology and pumping equipment into the renowned fleet. Clients understand that once the Welltech team have developed, endorsed and introduced a new product to their fleet, it is guaranteed to produce reliable, quality results. Welltech’s philosophy of Commitment = Satisfaction has proven that by listening and understanding, they can develop and deliver solutions to suit the most demanding of scopes and conditions. Welltech CEO David Henderson says, “It is our business to deliver fault-free solutions that really work and we are committed to delivering results.” Welltech acknowledge and appreciate the complexities of delivering Bypass projects which are always of a highly sensitive nature. Welltech brings together Management, Design and Engineering teams to collaboratively analyse each project in detail. With all potential projects, the in-house drafting division first prepare 3D dimensional layout images which provide both themselves and the client a clear understanding of exact setup footprints and layouts onsite. 28 | Australian water man age m e nt re v ie w The drafting team produce detailed P&ID’s, material take off lists, site layout plans and fabrication drawings for all items. Working closely with John Holland the Design team ensured the John Holland Management Team understood exactly how and what the site will look like once the Bypass system was installed. Welltech’s engineering team produced documentation covering all aspects of the project including: • Concise Flow Management Plans • Mechanical Checklists • Electrical Checklists • Pump hydraulic analysis • Site desktop analysis such as DBYD reviews Welltech ensured at the planning stage the project deliverables complied with John Holland/QUU requirements covering both its regulatory and legislative obligations. Our Engineering compliance not only satisfied the documentation deliverable but also ensured that the Welltech team maintain an impeccable quality control process, over the entire project. With the increased focus on sustainability surrounding site locations a very important final stage before attending the Woolloongabba site was the risk analysis. This included the following: • JSEA’s • SHEWMS • Risk and Environmental Analysis and plans • In the event of Alarm procedure • Accident and incident reporting Our HSE team ensure all personnel, equipment and sites were protected and safe at all times. With the detail in place both the John Holland and QUU teams were comfortable with the Welltech approach to all requirements. The first system was scheduled to pump 360L/sec through a 500m long 450mm HDPE welded and certified temporary bypass pipeline. Within days of commencing adversity struck as the skies opened and rain started to fall, flood levels rose to near record levels. Even though the Bypass station and the pipeline were in a floodway, Welltech stood strong and endured without loss. This was a prime example of the strength of each detail of each system with all scenarios considered and mitigated against. Welltech had designed and built flood mitigation platforms that kept all equipment not only high and dry but stable and anchored to prevent forced movement by the rushing torrent of water. The pipeline was saved by the use of latest technology duck foot anchors along its full length. With the worst behind them Welltech forged ahead successfully bypassing up to six locations at a time, pumping in excess of 3.6 Billion liters of sewerage over 424 days, all without incident or fault. Yet again the Woolloongabba Project proved testament that once Welltech are on-board the only outcome acceptable is incident free success.

Australian Water Management Review Vol. 1 2014 | Page 34