4.4 Renewal Replacement Plan The renewal strategy is designed to maintain the overall condition and performance of the asset infrastructure through a continuous, progressive cycle of replacement. The renewal programme is formulated from:- Age – the age of each asset is recorded in the asset management information system. A nominal useful life for every asset is allocated based on industry standards, experience or factual assessment; Condition – the condition of assets will be assessed through systematic survey and asset condition grading and also through casual observation during reactive or routine maintenance Performance – information is gathered on the performance of assets through post-storm analysis of surcharging and surface flooding. Consent compliance issues are recorded and contaminant ingress or inflow incidents are investigated and traced to the source; Maintenance Costs –routine and reactive maintenance is recorded against individual assets. Both the quantum of maintenance and the costs are used to assess full life cost of asset ownership Customer Service Delivery – requests for service and customer complaints are analysed Economic Obsolescence – the availability of spares, skills, techniques or restricted access through re-surfacing etc. may pre-empt the physical useful life an asset Renewal of stormwater assets is planned through the Stormwater Action Group in conjunction with the Operations and Maintenance Engineer and the Planning and Development Engineer. A schedule of potential renewal schemes is maintained and updated by the Operations Engineer. Page 47