Infrastructure Strategy Options to address it Implications of the options (financial and non- 3 Most likely scenario financial) This section provides an overview of the preferred options, and what this means for Costs levels of service, and for costs. Increased overflows and insanitary conditions. 3.1 Growth related to urban growth Older pipes remain vulnerable to earthquake damage. The provision of wastewater services were considered during the development of the Costs of increased maintenance and unplanned works. urban growth strategy. Servicing the identified growth pockets was achievable with Increased pumping and treatment of infiltration and some downstream upgrades. inflow. On-site sewerage will be installed by the developer to an agreed services plan. Council PREFERRED OPTION Benefits will collect and distribute development levies to fairly allocate the costs of over-sized Implement a proactive, Avoids unacceptable deterioration of the level of service. infrastructure that a developer may incur for the benefit of subsequent development. planned renewals Prevents damage to the environment and public health The costs of downstream upgrades has been estimated and added included in a programme and invest risks from sewage overflows. revised Developer Contributions model. more in condition assessment technology, Allows efficient, targeted investment in planned renewals field data collection and works. Conventional gravity sewerage with pump stations is preferred. Modern materials and data management. installation quality will minimise inflow and infiltration problems. Comprehensive condition grading will allow targeted renewals and an opportunity to ‘smooth’ the renewal Growth related to trade waste expenditure The continued success of Marlborough wines in national and international markets will Costs drive-up demand for increased grape processing capacity. The wine industry is rapidly Additional costs of CCTV surveying, pipe sampling, becoming the dominant industry in the region and facilitating growth by the provision of analysis and data collection to improve pipe and asset wastewater treatment will contribute to the continued development and prosperity. condition assessments and ensure well targeted renewals and efficient investment. Close monitoring of effluent volumes and strengths is undertaken each year during the vintage. Liaison with representatives of the industry will assist with anticipating the Implement a pipe Benefits timing of future upgrades agree a funding mechanism from each of the contributory rehabilitation programme Rehabilitation can be targeted at specific pipes or wineries in advance. using a variety of sections of pipe avoiding wholesale renewal costs rehabilitation techniques – Feasibility studies have been undertaken to upgrade the processing capacity of the patching, relining & Costs Blenheim Wastewater Treatment Plant to meet the projected peak demand periods renewals between March to May each year. An outline of treatment plant upgrades has been Very high quality condition data required. Specialist prepared. Detailed design and construction will be planned to meet the growth in techniques and skills may not be available locally and demand. incur additional establishment costs. Many rehabilitation techniques are relatively recent and have not been tested over a prolonged time and have unproven durability 2018-2028 Long Term Plan Page 198