Water supply assets in the Bega Valley Shire consist of:
The diameter of water mains ranges from 75 mm up to 450 mm. Water mains are made of a variety of materials including cast iron (CI), cast iron cement lined (CICL), asbestos cement (AC), ductile iron cement lined (DICL) and unplasticized polyvinyl chloride (uPVC or Blue Brute). All water storage reservoirs are made of concrete (apart from Bemboka which is steel).
Water supply assets are operated and maintained to:
Levels of service for water supply assets include:
Frequency of system failures:
Response time to system failures:
Assets are continually assessed for condition and serviceability. Condition assessment involves consideration of the material used, asset age and the identification of defects and deterioration. Serviceability assessment involves consideration of hydraulic performance, energy efficiency, frequency of maintenance and repairs, break history, water quality complaints and performance in comparison with levels of service.
Asset renewal and new infrastructure programs are based on condition and serviceability assessments.
The overall replacement value of our water supply assets is about $250 million. This includes dams, pipes, tanks, telemetry, pumps and all the other assets we use to deliver a safe and reliable supply of water to our customers. Each year we spend millions of dollars renewing and upgrading these assets. We spend around 2.3% of the total replacement value of our assets on their operation and maintenance each year. We are careful to make sure that we can afford to look after the new assets we build.
More information on our renewal expenditure can be found in the following documents:
Routine maintenance is regular on-going work that is necessary to keep assets operating. Maintenance includes:
Council’s Water and Sewerage Services Area Field Teams and Technical Services Team implement reactive, proactive and cyclic water supply asset maintenance under the supervision of the Water and Sewerage Network Operations Superintendent and the Water and Sewerage Operations Coordinator.
Maintenance Work Reports are completed by the field teams after maintenance works are undertaken. These completed Maintenance Work Reports are provided to the Water and Sewerage Services Management Team to update Council’s AssetPlan asset management system for scheduling investigations and capital upgrades.
Asset renewals are capital works to restore, rehabilitate, replace or renew water supply assets to their original service potential. Renewals do not increase the design capacity of the assets. Water supply system renewals include:
New water supply assets are required to improve existing assets beyond their capacity and/or to provide a higher level of service. This occurs as a result of growth, social or environmental needs and/or changes to statutory requirements or regulations. Over the next 5 years we are building water treatment plants worth about $30 million to improve the quality of water supplied, to better meet the Australian Drinking Water Guidelines and to better manage source and storage water quality risks (such as algal blooms).