e r 2 - Umgeni Water

Chapter| Bulk Potable Water Supply PlanOther major infrastructure augmentations that will be required over the next 30 years in the inland area to overcapacity constraints include:• Augment the ’69 Pipeline (Claridge to Wartburg) and increase the capacity of Wartburg Reservoir. TheWartburg Pump Station will also need to be upgraded;• Upgrade the Bruyns Hill Pumps Station, replace the pipeline from Bryns Hill Pump Station to the Bryns HillReservoir, and increase the capacity of the Bruyns Hill Reservoir.Central RegionDue to a water resource constraint at Nugwane Dam and the limited capacity of Amanzimtoti Water TreatmentWorks, it is necessary to augment the supply to areas downstream of the Amanzimtoti Water Treatment Workswith potable water from Wiggins Water Treatment Works via the South Coast Augmentation Pipeline, until suchtime as a new regional bulk water supply system is developed on the lower reaches of the Mkomazi River (refer toChapter 7). In the interim, the Wiggins Water Treatment Works sub-system should have sufficient treatment anddistribution capacity to meet the long-term demands of Amanzimtoti and the South Coast Pipeline.Hydraulic analysis has confirmed that the existing South Coast Augmentation Pipeline has adequate capacity tomeet current and projected demands up to the year 2020, provided that a new in-line booster pump station isinstalled along the South Coast Augmentation Pipeline to replace the existing Umlazi Pump Station. UmgeniWater is in the process of constructing a new South Coast Augmentation Booster Pump Station to address thisconstraint. This will serve as a medium-term infrastructure development strategy to meet current and projecteddemands off the South Coast Augmentation Pipeline up to the year 2021.South Coast RegionThe main issue that needs to be addressed in this region is the continued reliance on the already stressed LowerMgeni System as the primary water source for this region, supplied from Inanda Dam via the Wiggins WaterTreatment Works along the South Coast Augmentation Pipeline to the Amanzimtoti Water Treatment Works.The Amanzimtoti Water Treatment Works will need to continue to operate together with the South CoastAugmentation Pipeline in order to meet demands until a long-term solution is in place.Umzinto Water Treatment Works has experienced significant changes in its year-on-year growth rates over thepast four years, with the year-on-year growth rate in June 2010 being in excess of 12.3% and then dropping to 1.3%by October 2010. This was attributed to the Middle South Coast Region experiencing very little rainfall. Theprevailing dry weather conditions throughout the area had a major impact on the storage levels of the Umzintoand the E J Smith dams.Umgeni Water is currently in the process of implementing Phase 2a of the South Coast Pipeline (SCP-2a), whichwill relieve the demand off Umzinto Water Treatment Works by approximately 4 500 cubic metres per day. Thiswill allow the relieved capacity to be utilised for growth further inland. In addition, Umgeni Water is alsoimplementing a new link from Scottburgh South Reservoir, via Ellingham Reservoir, to Umzinto Water TreatmentWorks to mitigate the risk of non-supply during dry periods and to meet future increases in water demand fromthe Umzinto Water Treatment Works. This project will provide an additional 4 500 cubic metres per day toaugment the supply from the Umzinto Water Treatment Works.The demand in the area immediately south of Mtwalume, under the jurisdiction of Ugu District Municipality, hasrecently increased significantly. This has placed excessive stress on the Mtwalume Water Treatment Works andsubsequently on the Umzinto Water Treatment Works, which supplements the Mtwalume Water TreatmentWorks via the pipeline linking the Bazley Reservoir to the Elysium Reservoir supply zonePage 50 Umgeni Water Five-Year Business Plan | 2011/2012 to 2015/2016