e r 2 - Umgeni Water

| Bulk Potable Water Supply Plan ChapterThe development plan for the Upper and Middle South Coast regions is outlined below. This plan utilises theavailable resources from the Lower Mgeni, Nungwane, Mkomazi, Mzimayi, Mzinto and Mtwalume systems in themost sustainable and cost effective manner.• Water from the South Coast Augmentation Pipeline is only expected to be available at theAmanzimoti Water Treatment Works, in ever reducing amounts, until 2020. Therefore, theAmanzimtoti Water Treatment Works will need to remain operational in the short to medium-term.• Complete the construction and commissioning of the South Coast Augmentation Booster PumpStation to ensure that the maximum capacity is achievable through the South Coast AugmentationPipeline .• Rehabilitation and/or replacement of the pipeline from Nungwane Dam to the Amanzimtoti WaterTreatment Works will need to be undertaken.• The long-term strategy is to develop a regional bulk water supply scheme that will receive raw waterfrom the lower Mkomazi River for treatment and distribution into the South Coast Pipeline. Potablewater would be fed northwards to the Upper South Coast region and Amanzimtoti, and southwards tothe Middle South Coast region.• The South Coast Pipeline is to be extended southwards in two phases. The South Coast Pipeline Phase2a project (SCP-2a), is to be implemented towards the end of 2011. This project will provide somerelief for the Umzinto and Mtwalume Water Treatment Workss. The South Coast Phase 2b project willtie into the end of SCP-2a and will link to the Ugu District Municipality supply system from theMzimkhulu River to add a measure of flexibility and a contingency for drought situations in eithersystem. The timing of SCP-2b is dependent on the development of the regional BWS on the lowerMkomazi River.• The Umzinto Water Treatment Works will continue to function in order to supply potable water tocommunities in the adjacent inland areas of Ugu District Municipality.• To augment the supply from Umzinto Water Treatment Works, especially during low rainfall periodsas experienced during the period from March 2010 to October 2010, the supply to Umzinto WaterTreatment Works must be supplemented from the South Coast pipeline via Scottburgh South andEllingham reservoirs.North Coast RegionThe primary source of potable water supplied to the North Coast Supply System (NCSS) is from the 45 000 cubicmetres per day Hazelmere Water Treatment Works. With the current demand regularly exceeding the capacity ofthe plant, the operation of the plant is difficult and routine maintenance on components of the plant is nearimpossible. The comparatively high supply from the Water Treatment Works when compared to the plant capacityand the expected increase in future demand has necessitated the upgrading the Water Treatment Works from45 000 cubic metres per day to 75 000 cubic metres per day (98% assured yield of the raised Hazelmere Dam).The town of KwaDukuza is supplied from the Mvoti Water Treatment Works via the Mvoti Balancing Reservoirs.The average demand placed on the Water Treatment Works over the past year was 16 950 cubic metres per day.The design capacity of the Water Treatment Works was 12 500 cubic metres per day.The strategic development 30-year plan for the region, that would utilise the available resources from theHazelmere, Thukela and Mvoti systems (as discussed in Chapter 7) in the most sustainable and cost effectivemanner, is presented below.• DWA to raise the full supply level of Hazelmere Dam to increase its firm yield and Umgeni Water to upgradethe Hazelmere Water Treatment Works to supply up to 75 000 cubic metres per day to the NCSS. Inaddition to the upgrade of the Water Treatment Works, pump stations and pipelines within the NCSS willhave to be augmented to ensure the demand placed on the system does not exceed the capacity of theinfrastructure. Pipelines that are constructed as part of this augmentation process will be built with theUmgeni Water Five-Year Business Plan | 2011/2012 to 2015/2016 Page 51