The renewal strategy is heavily influenced by the continued rapid growth in demand. Wherever possible renewals are coordinated with capacity upgrades and the costs shared between the two drivers. Figure 5 Projected Stormwater Renewal Expenditure Similarly additional priority will be awarded to projects where the existing asset is under- performing causing a level of service issue. The costs of all capital projects are distributed between the main drivers – renewals, i poveent to levels of service and growth. Intervention points are established based on the criticality of the asset. Pipes and pumps that are critical to the drainage system are not allowed to fail. They are routinely monitored and maintained and renewal planned to avoid service failure. Currently non-critical assets are allowed to fail and renewed when the cost of maintenance or service interruptions become un-tenable. This strategy ensures the useful life the asset is maximised and delays renewal as long as possible. This is considered a rational approach at this time. The condition of the whole asset base has yet to be determined through comprehensive survey and assessment. The sequence and detailed design of urban development is still to be established. There is, therefore, a motivation for delaying renewals whilst the overall strategy for the Stormwater Management Areas is more highly developed. Figure 5 Projected Stormwater Renewal Expenditure has been determined from the re-valuation data. There is significant increase in pipeline replacement activity forecast as the current trend in pipeline performance is anticipated to continue. A more detailed renewal programme will be Page 48