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FINAL REPORT TUMUT GOLF CLUB EFFLUENT REUSE SCHEME An overview of Tumut Tumut is located midway between Australia’s major capitals and the region is spectacular in natural beauty and diversity. Tumut is the northern gateway to the Kosciusko National Park and the intersection of the Snowy Mountains Highway and Snowy Valleys Way, two of Australia’s great high country touring routes. The Tumut Region is enjoying a second decade of sustained growth with a traditional agricultural and horticultural based economy enhanced by major investment in plantation timber, manufacturing, transport/logistics, and power generation industries. Along with tourism, retail and service infrastructure that diversity underpins a number of favourable economic indicators including population growth, employment growth, income growth, and increased residential property values. Tumut is the primary service centre to a regional population exceeding 20,000 people, with significant retail, education, health and associated services. Planning The rationale behind the scheme The Tumut Golf Course is an 18 hole course with grass greens and prior to this scheme was irrigated with raw water from the Tumut river, with up to 75 megalitres (ML) per year previously being used. The Tumut Shire Council raw water system provides water to Councils parks & gardens, and several other customers and has limited capacity to supply all customers during peak periods. This situation has at times resulted in the Golf Club being limited in water for irrigation during these periods. This scheme will provide the following benefits: 1. More than satisfy the demand for irrigation at the golf club by being able to provide up to 150 ML/year of recycled water. 2. The system has the potential to supply another sports field situated adjacent to the rising main. 3. Replaces existing fresh water usage from the Tumut River and reduces the volume of treated effluent discharged to the River thus providing environmental benefit to the river system. 4. Provides security of supply to the golf club not affected by water shortages and subsequent water restrictions 5. Provide vastly improved playing surfaces at the golf club. 6. Increase patronage of the golf club and provide a ‘knock on’ affect to the township from increased visitation. General description of the scheme The scope of works included: A pump station and chlorinator at the sewage treatment plant 2.34 kilometres of 150mm diameter PVC rising main A holding dam including security fence Radio telemetry control and monitoring system 150mm diameter feed main to irrigation pumps Supply of irrigation pumps and screen filter The recycled effluent delivery works will be operated and maintained by Council and the onsite irrigation system will be operated and maintained by the Golf Club. The golf club funded and upgraded the onsite spray irrigation system. Design considerations of the project Councils engineering department completed all survey, design, negotiations and approvals for the project. The majority of the works were constructed within Council property and or road reserves. A small portion of the works encroached onto decommissioned railway land controlled by the Australian Rail Track Corporation (ARTC), and a formal agreement for a pipe crossing of their land had to be completed, this includes payment of an annual fee of $220 to them. The pipeline also encroached onto Crown land known as ‘Jarrah Park’ and formal approval to construct the pipeline across this land was obtained from the Department of lands. The golf course is also situated on Crown land and formal approval had to be obtained from the Crown to construct the scheme on this land. Council recently (2007) constructed a new sewage treatment plant at Tumut and this plant produces very high quality effluent which is discharged to the Tumut River at a rate of 900 ML/year. The reuse system draws effluent from a 2 ML ‘Catch/balance’ pond. Effluent entering the Catch/Balance pond is chlorinated to inhibit algal growth in the pond. The reuse system is designed to pump 75 KL/hour on single pump operation or 115 KL/hour in dual pump operation. Irrigation of the golf course and operation of the pumping system would normally occur between to hours of 10.00 pm and 7.00 am during ‘Off peak’ electricity tariff times. Effluent is pumped 2.3 kms via a 150mm PN 16 PVC pipeline against a total head of 85 metres. The pumps utilized are 23 kW Grundfos Model CR64-4 multistage, with soft starters. The effluent is chlorinated with sodium hypochlorite injected immediately downstream of the pumps and the chlorine dose is adjusted so as to maintain a free chlorine residual of between 0.5 – 1.0 mg/litre in effluent entering the storage dam. The storage dam was designed with separated inlet and outlet pipes to encourage turnover of the water within the dam so as to minimize algal growths. The concept design for the delivery works was prepared by the Manager Assets and Design, Council staff then completed a detailed survey of the pump station site, pipe alignment and storage dam utilizing GPS (Trimble) survey equipment. Staff carried out a hydraulic analysis of the pipeline utilizing the Iplex Pipelines website. (users must register to use this site). http://www.iplex.com.au/iplex.php?page=user&id=812&vc=2e0bc73a06a591fd5ea9a5f8 3540e9cc Detail design was completed utilizing CivilCAD and AutoCAD software. From the dam the 150mm PN 16 PVC outlet pipe supplies effluent to the new irrigation pump set fitted with an automatic backwashing screen filter. The underground irrigation system is designed to provide the following amounts of recycled water: 115,621.48 square metres of fairway are to be irrigated at 25mm per week 5,214.90 square meters of green are to be irrigated at 50mm per week 3,340.41 square meters of tee are to be irrigated at 25mm per week Risk Assessment and Approval in Accordance with s.60 of the Local Government Act 1993. Council has prepared an extensive Risk assessment and submitted it to The Department of Water and Energy for Approval in June 2009. A formal agreement for the Use of Recycled Water has been entered into between Council and The Tumut Golf Club Ltd. Overview of Scheme Project Milestones Milestone Number Milestone Detail Planned Completion Date 21/11/2008 1 Complete survey, detail design and gain all approvals 2a Complete effluent rising main 13/3/2009 2b Complete Effluent pump station, Chlorinator, electricals and controls 13/3/2009 2c Complete storage dam, associated pipework, telemetry and fencing Complete testing and commissioning 13/3/2009 3 10/4/2009 Note: The works were actually completed and commissioned on 15 May 2009. The Golf Club has since installed the new irrigation pumps and upgraded the underground irrigation system, with testing completed 16 October 2009. Depending on rainfall it is expected the scheme will commence regular operation in early November 2009. Official Opening The Hon. Dr Mike Kelly AM MP, Parliamentary Secretary for Water will be officially opening of the scheme on 9th November 2009. Yours faithfully John Maxwell Manager Assets & Design (Engineering Services)