Activity Group: Stormwater Drainage Major Budgeted Capital Projects Urban Growth Strategy The following table outlines the major budgeted projects and areas of Stormwater management is a significant element in planning new urban expenditure proposed for this Activity over the next 10 years. Although these development pockets as part of the Growing Marlborough Urban Growth items are budgeted, in some cases further public consultation will be required Strategy. Early involvement with developers from the outset of the planning with the relevant community before the project is implemented. These projects process allows structures to manage stormwater quantity and quality to be are also listed under the Capital Expenditure line of the Funding Impact incorporated into the design of new subdivisions. Statement at the end of this Activity section. Urban growth in Blenheim is largely to the north and west of the town — and it Inflated will be important to ensure downstream upgrades are provided in a timely Areas Major Capital Projects value manner. Evaluation and installation of effective stormwater quality control (Millions) techniques for new subdivisions and retrofit of existing reticulation will also occur. 2021-24 Murphys Creek Pipeline $4.2 2025-28 Graham, Stephenson, Stuart St, $4.3 Climate Change and Francis St Pipelines The impact of climate change is likely to become increasingly important in future Blenheim $4.6 planning. The current indications are that extreme weather events will become 2018-28 Other Pipelines 2019-21 Water Quality infrastructure for more frequent and more intense. Sea level rise will have implications for the Kinross St $0.5 effectiveness of discharge to the sea and from the outfalls of the drainage network. Additional contingencies are being built into new designs but existing Emerging Issues and Expected Changes infrastructure will be severely tested by changing weather patterns. Stormwater Strategy The following issues are emerging within this Activity: Blenheim’s flat topography and sensitive receiving environments provide • implementation of the Blenheim Stormwater Strategy and extension of challenging conditions for stormwater management. Council has approved a strategic goals to other townships stormwater strategy which provides clear direction and an integrated approach establishment of effective Stormwater Management Area Plans in to managing Blenheim's stormwater future. This strategy sets out a 10 year plan • of activity and provides a comprehensive framework to manage both the quality Blenheim and other areas. and quantity of stormwater. It also provides for an overhaul of the resource • review and consolidation of existing stormwater discharge consents. consent structure for Blenheim’s stormwater, which will involve review and consolidation of existing stormwater discharge consents. • urban growth in Blenheim is largely to the north and west of the town – ensuring downstream upgrades are provided in a timely manner. The strategy requires clear lines of responsibility, improved integration, rigorous ensuring good stormwater design is incorporated into the design of new monitoring and a more modern approach to regulation. It will result in the • establishment of effective Stormwater Management Area Plans throughout sub-divisions. Blenheim. • evaluate and install effective stormwater quality control techniques for Ongoing investment in the objectives of the strategy will result in functional new sub-divisions and retro-fit to existing reticulation where required infrastructure, improved customer experience and minimal impact on the natural • adaption to climate change. receiving environments. The strategy’s goals and approach will be extended to other townships over time. 2018-2028 Long Term Plan Page 88