7. RECOMMENDED PROJECTS - Umgeni Water … Status Detailed Feasibility Project Description After the final planned commissioning of Phase 2B of the Mooi-Mgeni Transfer Scheme (MMTS-2)

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7. RECOMMENDED PROJECTS

7.1 Overview Section 5 of this Infrastructure Master Plan describes each of the water supply systems within the Umgeni Water area of operation, discusses the constraints identified within each one, and makes recommendations on the water supply infrastructure that is required to alleviate these constraints. Figure 7.1 illustrates the systems and subsystems that each of the recommended projects belongs to, and should also be read in conjunction with Figure 5.1. This Section links directly to Section 5, and describes each of the recommended infrastructure projects of significance in more detail. In particular, projects currently being implemented, or are close to implementation, are discussed. A summary of the areas that will be supplied by these proposed projects are shown in Figure 7.2. The projects per WSA are summarised in Figure 7.3, Figure 7.4, Figure 7.5, Figure 7.6 and Figure 7.7. Also included in this Section, are descriptions of new infrastructure projects that have been identified to expand the area of supply. These projects are often planned to be linked into existing supply infrastructure and their future demands could impact on the existing infrastructure. These potential impacts are discussed in Section 5. It is important to note that the implementation of these projects is influenced, and driven, by a host of factors besides purely technical requirements. These factors include financial constraints, corporate strategy, politics and local government priorities, to mention but a few. All these factors carry their own weight in the decision making process and cannot be ignored. Hence the actual implementation and timing thereof, could well vary from what is mentioned for these projects. Finally, all planned new wastewater works (WWW) or proposed upgrades to WWW that Umgeni Water is responsible for are included at the end of this section. These proposals should be read in conjunction with Section 6. As previously mentioned in Section 6, Umgeni Water has recently taken over the operation of all the WWW within the Umgungundlovu District Municipality. Umgeni Water is assessing the nature of infrastructure development and or rehabilitation required at these works. This assessment is currently taking place and therefore there are no definitive plans to report on at this stage. However, the Darvill WWW is in the process of being upgraded and the detailed design for the upgrade of Mpophomeni WWW has been completed and these two WWW are therefore discussed in detail.

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Figure 7.1 Recommended projects per system.

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Figure 7.2 Areas that are anticipated to be supplied by Umgeni Water’s proposed projects.

Figure 7.3 Proposed projects within Umgungundlovu WSA and the areas anticipated to be

supplied.

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Figure 7.4 Proposed projects within eThekwini WSA and the areas anticipated to be supplied.

Figure 7.5 Proposed projects within Harry Gwala WSA and the areas anticipated to be supplied.

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Figure 7.6 Proposed projects within Ugu WSA and the areas anticipated to be supplied.

Figure 7.7 Proposed projects within iLembe WSA and the areas anticipated to be supplied.

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7.2 uMkhomazi System

7.2.1 uMkhomazi Water Project

Planning No. 114.0

Project No. UI0530

Project Status Detailed Feasibility

Project Description After the final planned commissioning of Phase 2B of the Mooi-Mgeni Transfer Scheme (MMTS-2) in 2016, the water resources available in the Mooi and Mgeni catchments, to augment the Mgeni System, will be fully utilised (Section 4.4.4). The MMTS-2 will increase the safe assured yield of the Mgeni System to 394 million m3/annum. Over recent years, eThekwini Municipality has put considerable effort into optimising the operation of its distribution systems that are served by the Lower Mgeni System. Amongst other things, this has led to them implementing new infrastructure in order to undertake a significant load shifting exercise. eThekwini Municipality’s Western Aqueduct project, which is expected to be fully commissioned in mid-2018, will represent the most significant of these load-shifting operations. The intention is for those areas currently being served under pumping from the Lower Mgeni System (viz. from Durban Heights WTP) to be transferred onto the Upper Mgeni System, and served under gravity from Midmar WTP via the Western Aqueduct (WA). This will result in the full utilisation of the Upper Mgeni resource by 2018. After the implementation of MMTS-2, further water resource developments within the Mooi-Mgeni system are not considered to be beneficial. Further augmentation of the Mgeni System will then be required. Water resource development on the uMkhomazi River has been identified as the next likely major project to secure long-term water resources for eThekwini’s Western Aquaduct supply zone. During the late 1990’s, the then DWAF (now DWS) and Umgeni Water jointly commissioned a pre-feasibility study to investigate various options for developing the uMkhomazi River’s water resources, such that they could be utilised to augment those of the Mgeni River System. A two-phased scheme was proposed, and the overall project area is shown in Figure 7.8. Phase 1 of the proposed uMkhomazi Water Project (uMWP-1) will involve the construction of Smithfield Dam, located along the central reaches of the uMkhomazi River midway between Lundy’s Hill Bridge and Deepdale. Smithfield Dam will be the primary impoundment, whilst for Phase 2, a second dam (Impendle Dam) will be constructed upstream of the Smithfield site (just downstream of the uMkhomazi River/Nzinga River confluence). Phase 2 would only be implemented once the yield of Phase 1 (Smithfield Dam) has been fully utilised.

Figure 7.8 uMkhomazi Water Project.

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It is proposed that raw water from Smithfield Dam be transferred between the uMkhomazi and Mgeni catchments via a tunnel through the catchment divide. Water will be delivered into a balancing dam located in the Mlazi River catchment near Baynesfield. Water will then be treated at a new regional WTP to be constructed in the vicinity. Potable water will then be delivered under gravity, via a large diameter potable water pipeline into the ’57 pipeline downstream of Umlaas Road Reservoir. Key information on this project is summarised in Table 7.1.

Table 7.1 Project description: uMkhomazi Water Project.

Project Components

Water Resource Components (to be developed by DWS): Smithfield Dam – having a storage capacity 251 million m

3 (31% of MAR), earth core

rockfill dam.

A Transfer Tunnel – 3.5 m bored diameter (3.0 m lined diameter), concrete-lined

(where necessary), overall length of 32 km.

Balancing Dam – located at the outlet portal of the tunnel in the vicinity of

Baynesfield Estate.

3km of 3 000mm Raw Water Pipeline.

Potable Water Supply Components (to be developed by Umgeni Water): Water Treatment Plant (WTP) – to be located near Baynesfield Estate with an initial

capacity of 500 Mℓ/day and allowance for another module to increase capacity to

625 Mℓ/day.

170 Mℓ potable water storage reservoir at WTP.

Bulk Potable Water Pipelines –2 820mm diameter (15.1km) and 2 540mm diameter

(4.6km) gravity mains from the WTP to ’57 pipeline.

Capacity 625 Mℓ/day

Institutional Arrangements DWS will plan, develop and own the water resource and raw water infrastructure up to the WTP. The operation and management component of this infrastructure will be decided at the time of commissioning. Umgeni Water will plan, build, own, operate and maintain all water supply infrastructure from (and including) the WTP. Umgeni Water will purchase raw water from DWS as per a revised raw water agreement and sell potable water from this system to eThekwini, the Msunduzi and Umgungundlovu municipalities, as per the existing bulk water supply agreements.

Beneficiaries The scheme will primarily serve the eThekwini Municipal area and to a lesser extent portions of Umgungundlovu District Municipality.

Implementation The project is divided into three components:

Module 1: Technical Feasibility Study: Raw Water (Appointment by Department of Water

and Sanitation). The study was completed in 2015;

Module 2: Environmental Impact Assessment (Joint appointment by Department of Water

Affairs and Umgeni Water). Targeted submission date is June 2016;

Module 3: Technical Feasibility Study: Potable Water (Appointment of PSP by Umgeni

Water). The study was completed in 2015.

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The project needs to be implemented by 2018 in order to achieve a 99% level of assurance of supply to the Mgeni System. However, the earliest possible commissioning of this scheme is 2024. The estimated cost of the entire project (of both the water resource and water supply infrastructure for both phases) is in the order of R 18 billion at 2015 prices. This is made up of R 13.5 billion for the raw water component to be implemented by DWS and R 4.5 billion (Excl. VAT) for the potable component to be implemented by Umgeni Water.

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7.2.2 eMzimkhulu Bulk Water Supply Scheme

Planning No. 162.6

Project No.


Project Description The Harry Gwala District Municipality (formally Sisonke District Municipality) is in the process of entering into a Regional Schemes Agreement with Umgeni Water, whereby Umgeni Water will plan and implement selected regional schemes. The eMzimkhulu Bulk Water Supply Scheme was selected by the municipality as one of its priority interventions. The purpose of this study is to identify any feasible bulk water supply options that could: • in particular, provide an alternative, more reliable, source of potable water for the stand-

alone rural water supply schemes which rely, to a large extent, on protected springs, boreholes or run-of-river abstraction, and that continue to present operational and financial challenges for the municipality; and

• in general, provide an adequate supply of potable water to meet the growing needs of the area.

A pre-feasibility and detailed feasibility investigation is being undertaken of options to supply this area with potable water. The locality map and extent of the study area are shown in Figure 7.9. The Umzimkhulu Local Municipality (KZN435) is predominantly rural in nature with dispersed settlement patterns. The northwestern limit of the study area is defined by the Ndawana River, which is the boundary between the Kwa Sani and Umzimkhulu Local Municipalities. At Coleford the Ndawana River joins the Ngwangwane River, which forms the boundary between the Ingwe and Umzimkhulu Local Municipalities. It is not envisaged that supply from the eMzimkhulu BWSS will supply north of the Ngwangwane River, the Greater Kilimon BWSS will supply the area from Kilimon to the St. Apollinaris area in the Ingwe Local Municipality. The western boundary follows the border between the Greater Kokstad local municipality and Umzimkhulu Local Municipality past Tigerhoek until the boundary shared by Ugu District Municipality and Harry Gwala District Municipality. The southern boundary extends from Tigerhoek along the District boundary, across the Bisi River to the uMzimkhulu River and along it till Gloucester. The eastern boundary follows the uMzimkhulu River from the Ngwangwane River to the District boundary. Note: The study area, as defined in this project, should not be construed as being fixed, but rather as a starting point for further refinement and adjustment as options are developed in more detail.

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Figure 7.9 eMzimkhulu BWSS area of study.

Institutional Arrangements The study will analyse the institutional, management and financial implications with respect to the ownership and management of the proposed new infrastructure. This analysis will serve as the basis of further discussions between Harry Gwala DM as the Water Services Authority, Umgeni Water and the Department of Water and Sanitation. The PSP will liaise closely with Umgeni Water’s Planning and Operational staff in the area, as well as with the other affected parties, including Harry Gwala DM, in order to assess their requirements and viewpoints in this regard.

Beneficiaries The scheme will primarily serve the Umzimkhulu Local Municipality area and possibly portions of other Local Municipalities within Harry Gwala District Municipality.

Implementation Pre-Feasibility Studies are currently being conducted and the envisaged time for completion is June 2016. Thereafter the detailed feasibility will be conducted on the preferred option and the detailed feasibility will be completed in February 2017. Detailed feasibility will provide implementing timeframes, project staging and funding options.

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7.3 Mooi System

7.3.1 Greater Mpofana Bulk Water Supply

Planning No. 105.24

Project No. UI49

Project Status Construction

Project Description Sustained housing development and tourism related activities are increasing the water demand at several nodes along Main Road R103 between Lions River (uMngeni Local Municipality) and Mooi River (Mpofana Local Municipality). This growth is beginning to stress local water resources and water supply infrastructure in the area. A regional bulk water supply scheme is required to ensure that the area has a reliable water supply that will sustain this growth into the future. The proposed scheme (Figure 7.10) will obtain raw water from the recently completed Spring Grove Dam on the Mooi River to a WTP to be situated adjacent to the dam. From here potable water will be pumped to two command reservoirs. The first reservoir will be located at Bruntville in Mooi River. This reservoir will serve the greater Mooi River area and will have the potential to supply the Muden/Rocky Drift area. The Mooi River WTP and Rosetta WTP can then be decommissioned. The second reservoir will be at Nottingham Road which will then supply Balgowan, Lidgetton and possibly Lions River. There is also a link pipeline to Mount West. The scheme is likely to be built in phases to gradually increase the supply area (Figure 7.11) Key information on this project is summarised in Table 7.2.

Figure 7.10 Greater Mpofana Bulk Water Supply Scheme.

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Figure 7.11 Schematic of Greater Mpofana BWSS.

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Table 7.2 Project information: Greater Mpofana Bulk Water Supply Scheme.

Project Components: Phase 1: 20 Mℓ/day Water Treatment Works, associated pump-stations, 400mm diameter pipeline to Nottingham Road and 10 Mℓ reservoir, and 500mm diameter pipeline to Rosetta and Bruntville in Mooi River with 12 Mℓ reservoir at Bruntville. Phase 2: Pipeline from Nottingham Road Reservoir to Balgowan and then Lidgetton including the Balgowan Reservoir. Phase 3: Pipeline from Nottingham Road to Mount West including a reservoir at Mount West and pipeline to Lions River including a reservoir at the termination point. Phase 4: Possible Pipeline to Msinga

Capacity (WTP): 20 Mℓ/day; Two further upgrades to be undertaken when required reaching an ultimate capacity of 60 Mℓ/day.

Institutional Arrangements Umgeni Water will own, operate and maintain this bulk scheme and will sell potable water to the Umgungundlovu District Municipality as per the Bulk Water Supply Agreement. The Umgungundlovu District Municipality will then reticulate to the end consumers through existing and new supply infrastructure.

Beneficiaries The scheme will serve residential and tourist establishments in the Mpofana Municipality and uMngeni Municipality within the Umgungundlovu District Municipality. It will also be a source of potable water for low cost housing in Bruntville and Lions River in the Mpofana and uMngeni municipalities respectively. The forecasted water demand for the Greater Mpofana BWSS is shown in Table 7.3.

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Table 7.3 Water forecasts for the Greater Mpofana BWSS.

Mpofana Municipality 2013 2043

Mooi River 7.3 15.24

Weenen & Msinga 0.00 8.00

Rosetta 0.4 0.85

Mpofana Total 7.7 24.10

Mngeni Municipality 2013 2043

Nottingham Road 1.50 13.6

Mount West & Currys Post 0.0 5.1

Balgowan & Lions River 0.0 14.8

Mngeni Total 1.5 33.5

Total Volume - Expected 9.2 57.6

Implementation The project will be phased with the first phase consisting of a 20 Mℓ/day WTP at Spring Grove Dam and separate pumping mains to new reservoirs at Bruntville (12 Mℓ) and Nottingham Road (10 Mℓ). The total cost for Phase 1 is anticipated to be R 715 million as at 2015. Construction completion is expected to be in 2019.

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7.4 Mgeni System

7.4.1 ‘251 Raw Water Pipeline: Midmar Dam to Midmar

WTP

Planning No. 105.0

Project No. UI0302

Project Status Construction Stage

Project Description The Midmar Water Treatment Plant (WTP) draws raw water from Midmar Dam. Water from the dam is supplied under pumping via the ‘251 Pipeline. The ‘251 Raw Water Pipeline is a single, 1 626 mm OD (1 544 mm ID), cement-lined, steel pipe consisting of two sections. The first section, from the dam outlet works to the raw water pump station is approximately 550 m long. The second section, from the raw water pump station to the water works is approximately 2 450m long. The Midmar WTP currently has a design capacity of 250 Mℓ/day and is scheduled to be upgraded to 375 Mℓ/day in the near future (Section 7.4.2). Three pump sets are currently installed in the raw water pump station (2 duty + 1 standby). A fourth pump set is to be installed along with the Midmar WTP upgrade. With the WTP upgrade to 375 Mℓ/day, flow velocity in the single raw water pipeline will increase to 2.3 m/s. Being the only raw water supply into Midmar WTP, this pipeline is a strategic asset and its overall risk rating is thus high. DWS has modified the Midmar Dam outlet works and pipework to provide a second outlet pipeline and cross-connections at the dam wall. This intervention has minimised the risk of failure of the dam outlet works. Umgeni Water must now ensure that the overall risk of the raw water transfer between the dam and the Midmar WTP is mitigated by providing a second raw water transfer pipeline between the outlet and the WTP (Figure 7.12). Pumping efficiencies will also be achieved by installing this new pipeline. Key information on this project is summarised in Table 7.4.

Table 7.4 Project information: ‘251 Raw Water Pipeline from Midmar Dam to Midmar

WTP.

Project Components: 1600 mm diameter raw water pipeline from dam outlet to Midmar WTP. 1400 mm diameter through pipe jacks. Fourth raw water pump.

Capacity: 375 Mℓ/day

Institutional Arrangements The new infrastructure will be owned, operated and maintained by Umgeni Water.

Figure 7.12 General Layout of the ‘251 Raw Water Pipeline: Midmar Dam to Midmar WTP.

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Beneficiaries The scheme will serve the ’61 System which supplies potable water to uMngeni, The Msunduzi, Umgungundlovu and eThekwini Municipalities.

Implementation The project will be constructed over two years and is estimated to cost R131 million as at January 2015. Construction started in June 2015 and the anticipated completion date for the project is December 2016.

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7.4.2 Midmar Water Treatment Plant Upgrade

Planning No. 105.0

Project No. UI150


Project Description The Midmar Water Treatment Plant (WTP), which was commissioned in 1996, draws raw water from Midmar Dam. Water from the dam is supplied under pumping via the ‘251 Pipeline. The Midmar WTP has a design capacity of 250 Mℓ/day and is currently operating at an AADD of around 226 Mℓ/day. With the imminent implementation of the load transfer of the Western Aqueduct demand onto the Upper Mgeni System, it is necessary to upgrade the capacity of Midmar WTP. The WTP will be upgraded to 390 Mℓ/day so that the combined capacity of the Midmar WTP and D.V. Harris WTP will utilise the maximum yield (at a 99% assurance level) available from Midmar Dam once the MMTS-2 has been commissioned. See Figure 7.13 for layout and key information on this project is summarised in Table 7.5.

Institutional Arrangements The Midmar WTP is situated in uMngeni Local Municipality. Umgeni Water will own, operate and maintain the upgraded Midmar WTP and will sell potable water from this system to the Msunduzi Local Municipality, eThekwini Municipality and Umgungundlovu District Municipality as per existing bulk water supply agreements.

Beneficiaries The scheme will serve the ’61 System which supplies potable water to Msunduzi, Umgungundlovu and eThekwini Municipalities.

Implementation The project will be constructed over two years and is estimated to cost R 215 million at January 2016 prices. Anticipated project completion is end 2017.

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Table 7.5 Project information: Midmar WTP Upgrade.

Project Components: WTP capacity upgrade from 250Mℓ/day to 390Mℓ/day. Design, installation, testing and commissioning of: Dosing Equipment

New dosing points at 200 s point on new rising main for Bentonite, PAC and Chlorine and associated pipework, valves and fittings.

Three new 1400 L/h Bentonite dosing pumps including bursting discs.

Four new 90 L/h Polyelectrolyte dosing pumps and one new recirculation pump.

Two new 20 m3 Polyelectrolyte storage tanks.

Two new 1000 mm inline static mixers.

One new ammonia dosing pump.

CHLORINATION EQUIPMENT

Chlorine scrubber

Tanker connection

Weigh bridge Pulsator Clarifier

Vacuum fan

Lamella packs

Clarified water launders

Pipework, Valves, Fittings and Specials

BACKWASH BALANCING TANK

Coarse bubble diffused air system

Flow meter and motorised valve

Relocation of grit trap compressor Clariflocculators

Pipework, valves and specials

Two rotating half bridge scrapers (upon which the vertical shaft mixers are installed)

Eight slow Speed vertical shaft paddle mixers

Two flocculation zones Gravity Thickener

Distribution pipework and valves

Fixed half bridge

Picket fence mixer and scraper with motor

Two progressive cavity sludge pumps

Two thin sludge pumps Centrifuge

The complete centrifuge assembly with all its instrumentation, fixings and fittings.

Distribution pipework and valves.

Discharge chute.

Capacity: 375Mℓ/day.

Figure 7.13 General Layout of Midmar WTP upgrade.

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7.4.3 Howick-West Reservoir Upgrade

Planning No. 105.03

Project No. UI0613A

Project Status Detailed Design

Project Description Potable water is supplied to the Howick-West Reservoir Complex from Midmar WTP via the Mills Falls Pump Station along a 700 mm NB diameter steel pipeline. The current total storage capacity at the Howick-West Reservoir Complex is 16.5 Mℓ and serves as the distribution node for the supply area (Figure 7.14). Water is then pumped from the Howick-West Reservoir Complex to Mpophomeni and Groenekloof Reservoirs via the Howick-West Pump Station along a 250 mm and a 600 mm diameter steel pipeline respectively. The Groenekloof Reservoir Complex, with a current total storage capacity of 17.27 Mℓ, serves as a further distribution node from where the water is pumped to the Greater Vulindlela area and gravity-fed to the Sweetwaters and Blackridge terminal reservoirs. The uMngeni Local Municipality is in the process of implementing a low-cost housing development in the Mpophomeni supply area and middle to high-income residential development in the Garlington area. These proposed developments, combined with the natural growth of the Howick-West Supply System, will place undue stress on the Howick-West Reservoir Complex to sustain the projected demand. To sustain the current and future demand off the Howick-West Reservoir Complex, it is necessary to augment the existing storage capacity at the Howick West Reservoir Complex. The storage requirement is based on the following reservoir sizing parameters:

Storage for reticulation supply : 36 hours

Storage for Mpophomeni Reservoir Supply : 15 hours

Storage for Groenekloof Reservoir Supply : 8 hours

Groenekloof Reservoir is in itself a balancing reservoir therefore, to avoid “double accounting” of storage required for the Groenekloof demand, this balancing demand will be shared between the reservoirs.

Figure 7.14 General layout of the proposed Howick-West Reservoir.

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Table 7.6 Storage Requirement at Howick-West Reservoir.

Supply Demand in 2028

(Mℓ/day) Time (hours)

Required Storage (Mℓ)

Reticulation 4.5 36 6.8

Mpophomeni 10.6 15 6.6

Groenekloof 48.0 8 16.5

TOTAL STORAGE REQUIREMENT 30.0

The determination of the storage requirement at Howick-West Reservoir is indicated in Table 7.6. Based on storage requirements and the demand projection, the upgrade of storage at Howick West Reservoir is already required in 2015. Reservoirs are sized for a 10 year future demand, hence the upgraded storage requirement is therefore determined on the 2025 demand. If projections materialise as expected, then the current storage of 16.5 Mℓ should be increased by adding a new 16 Mℓ reservoir in 2015/2016. This will bring the total storage up to 32.5 Mℓ. Key information on this project is summarised in Table 7.7.

Table 7.7 Project information: Howick-West Reservoir Upgrade.

Project Components: New reservoir

Capacity: 16.0 Mℓ

Institutional Arrangements The new Howick-West Reservoir will be owned, operated and maintained by Umgeni Water.

Beneficiaries The upgrade to Howick-West Reservoir serves as a balancing reservoir that will indirectly serve Vulindlela, Blackridge and Sweetwaters in The Msunduzi Municipality and Mpophomeni and Hilton in the uMngeni Municipality.

Implementation The construction duration of this project is anticipated to be one year. The total cost is estimated to be R55 million. Project construction is planned for January 2017.

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7.4.4 Groenekloof Reservoir Upgrade

Planning No. 105.39

Project No. UI65

Project Status Design

Project Description The Groenekloof Reservoir serves as a balancing reservoir for Vulindlela, Sweetwaters and Blackridge (Figure 7.15). The current demand out of Groenekloof Reservoir is 23 Mℓ/day. This demand is expected to increase to 34 Mℓ/day by 2030 when 24 Mℓ of storage will be required. The current capacity of the reservoir is 17 Mℓ. The reservoir capacity will be over allocated by 2018. An additional 10 Mℓ storage will then be required. Key information on this project is summarised in Table 7.8.

Table 7.8 Project information: Groenekloof Reservoir Upgrade.

Project Components: New 10 Mℓ reservoir.

Capacity: 10 Mℓ.

Institutional Arrangements The new reservoir will be owned, operated and maintained by Umgeni Water.

Beneficiaries The upgrade to Groenekloof Reservoir will benefit consumers in the uMngeni and the Msunduzi local municipalities.

Implementation The construction duration of this project is anticipated to be one year. The total project cost (including Vulindlela BWSS) is estimated to be R280 million. This upgrade may be required in 2018 if demands increase at projected rates. Project construction completion is currently planned for the end of 2018.

Figure 7.15 General layout of the Groenekloof Reservoir Upgrade.

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7.4.5 Umbumbulu Pump Station

Planning No. 105.37

Project No.

Project Status Pre-Feasibility

Project Description Supply to Greater Eston and Umbumbulu is via a 450 mm diameter pipeline. The capacity of this pipeline is restricted to 15 Mℓ/day due to the ground level profile along the pipeline route. The flow is restricted to ensure that the hydraulic grade line is at least 20 m above a high point at Stoney Ridge. The current flow in this pipeline is 11 Mℓ/day. Umgungundlovu District Municipality plans to supply the Greater Eston area with potable water from this pipeline. This, together with the natural growth in Umbumbulu, will mean that the flow in this pipeline could reach capacity by 2017/2018. A booster pump station would increase the capacity of the pipeline to serve future water demands. A static hydraulic analysis indicates that the pump station be situated close to the DN450 off-take to Umbumbulu (Figure 7.16).

Figure 7.16 General layout of the Umbumbulu Pumpstation Upgrade.

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Table 7.9 Project information: Umbumbulu.

Project Components: Designed to deliver approximately 23 Mℓ/day at 98 m pumping head. This

requires four (4) pumps, three duty and one stand-by.

Capacity: 23 Mℓ/day.

Institutional Arrangements Umgeni Water will own, operate and maintain the pump station and will sell potable water from this system to Umgungundlovu District Municipality and Ethekwini as per existing bulk water supply agreements.

Beneficiaries The beneficiaries will be the Greater Eston region the Umbumbulu and the Adams Mission community.

Implementation The construction duration of this project is anticipated to be one year. The total cost is anticipated to be R 125 million in January 2016.

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7.4.6 Lion Park Pipeline Augmentation

Planning No. 105.25

Project No. UI0620A


Project Description The Lion Park Pipeline supplies domestic and commercial consumers as well as farmers along the P566 Provincial Road. The new Manyavu pipeline which extends from the Lion Park Pipeline to Manyavu has resulted in additional demand being placed on the existing Lion Park Pipeline. This has resulted in a need to augment the Lion Park Pipeline to accommodate this additional demand. The recommendation is to augment the Lion Park Pipeline by constructing a 350mm diameter pipeline within the existing Lion Park Pipeline servitude (Figure 7.17). Key information on this project is summarised in Table 7.10.

Table 7.10 Project Information Lion Park Pipeline.

Project Components: 350 mm diameter pipeline from Umlaas Road Reservoir extending to the termination point of the existing the Lion Park Pipeline. Length = 7.2km

Capacity: 6.5 Mℓ/day.

Institutional Arrangements The new pipeline will be owned, operated and maintained by Umgeni Water.

Beneficiaries The beneficiaries of this project will be the community of Manyavu (current population of approximately 15 000) and users along the P566 Provincial Road. The pipeline will also serve the future growth in demand that is expected in Ashburton.

Implementation The construction duration of this project is anticipated to be one year. The total cost of the project is R 48 million. Construction completion is scheduled for the end of September 2016.

Figure 7.17 General layout of the Lion Park Pipeline Augmentation.

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7.4.7 uMshwathi Regional Bulk Water Supply Scheme

Planning No. 105.22

Project No. UI99


Project Description The existing Wartburg Pipeline (also known as the ’69 Pipeline), is constructed of steel and is bitumen coated and cement mortar lined. This pipeline is approximately 26 km long and varies from 300 mm to 250 mm in diameter. The new pipeline 850 mm diameter steel pipe from Claridge Reservoir to Wartburg Reservoir has now been constructed under Phase 1. The components of the project included a 26km Pipeline, a booster pump station and 8Ml Reservoir at Wartburg. The New Wartburg Pipeline would tie into the outlet of the existing 50Ml Claridge Reservoir. In addition this pipeline will supply the rural areas of Efaye, Ozwathini and Ndwedwe. See Section 7.6.1. In order to meet the projected demands for both existing consumers as well as the areas of greater Efaye, Ozwathini and Central Ndwedwe, new infrastructure will have to be constructed under the future phases (Figure 7.18). The infrastructure required to augment supply to existing consumers, and to enable supply to Efaye, Ozwathini, and central Ndwedwe is summarised in Table 7.11.

Institutional Arrangements The new infrastructure will be owned, operated and maintained by Umgeni Water and will be part of the Bulk Supply agreement with Umgungundlovu District Municipality.

Beneficiaries This project will initially benefit the residents of uMshwati Local Municipality and Ndwedwe Local Municipality. This scheme is estimated to serve approximately 324 433 people in 47 405 low income households.

Implementation The phases of the project are anticipated to be completed as follows:

Phase 1: December 2016

Phase 2: August 2017

Phase 3: May 2018

The total cost is estimated to be R 1.1 billion at 2016 prices.

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Table 7.11 Project information: uMshwathi Regional Bulk Water Supply Scheme.

Project Components: Phase 1

27km DN850, pipe supply contract and pipe yard preparations.

Construction of 27 km of 850DN solvent free epoxy lined and Polyurethane coated steel pipe from Claridge/Belfort to Wartburg Reservoirs.

Construction of 2 Pipe jacks under the R33 and Ottos Bluff.

Construction of 2 sleeved railway crossings, one is Claridge and the other in the dis-used Rail line in Wartburg.

Construction of 7 inline Isolating valve chambers.

Construction of 22 scour valve chambers.

Construction of 53 air valve chambers.

Construction of 3 meter chambers.

1.35MW Pump station.

8Ml Reservoir at Wartburg. Phase 2

Construction of 16 km of 700DN solvent free epoxy lined and Polyurethane coated steel pipe from Wartburg to Dalton.

Construction of 2 Pipe jacks under the R33 and Ottos Bluff.

Construction of 2 sleeved railway crossings.


Construction of 7 scour valve chambers.

Construction of 12 air valve chambers.


1.25MW pump station.

10Ml Reservoir at Dalton. Phase 3

Construction of 29 km of 700DN – DN400 solvent free epoxy lined and Polyurethane coated steel pipe from Dalton via Fawn Leas to Efaye .

Construction of 18 km of 700DN solvent free epoxy lined and Polyurethane coated steel pipe from Fawn Leas to Ozwathini.

Construction of 3 Pipe jacks under the R614.

Construction of 1 sleeved railway crossings.


Construction of approximately 30 scour valve chambers.

Construction of approximately 65 air valve Chambers.


0.15MW Pump station.

12Ml Reservoir at Ozwathini. Phase 4

See Section 7.6.1


Figure 7.18 General layout of the uMshwathi Regional BWSS.

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7.4.8 Wartburg to Bruyns Hill Pipeline

Planning No. 105.37

Project No.


Project Description The existing Wartburg to Bruyns Hill Pipeline consists of 5.8 km of 250 mm diameter pipe from Wartburg Reservoir to the Bruyns Hill Pump Station. Thereafter, there are two pipelines (each are 3.6km of 250mm diameter pipes) from the pump station to Bruyns Hill Reservoir. The system needs to be augmented due to:

Increased growth in demand within the current supply zone of Swayimane;

Proposed housing developments on the fringes of Swayimane and,

A new supply node into the Southern Ndwedwe area within the iLembe District Municipality.

iLembe District Municipality has identified the Wartburg System as the most suitable source

of water to feed into the Southern Ndwedwe area.

The projected demand is expected to be 9 Ml/day. Initial planning suggests that a 400 mm diameter steel pipe will be required (Figure 7.19). In addition, a 0.5 MW booster pump station will be determined at detail design stage.

Institutional Arrangements The new infrastructure will be owned, operated and maintained by Umgeni Water and will be part of the Bulk Supply agreement with Umgungundlovu District Municipality.

Beneficiaries This project will initially benefit the residents of uMshwati Local Municipality and Ndwedwe Local Municipality. This scheme is estimated to serve about 106 000 people in 13 000 low income households.

Implementation The infrastructure is required by 2017, to meet the planned housing projects in the supply area. Construction is anticipated to commence in April 2016. The total cost is estimated to be approximately R 78.5 million at 2016 prices.

Figure 7.19 Wartburg to Bruyns Hill Pipeline.

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7.4.9 Impendle BWSS

Planning No. 105.44

Project No.

Project Status Pre-Feasibility

Project Description The area of Impendle has unreliable sources of water and many small run-off-river abstraction and borehole schemes. This project will increase the level of assurance of supply to the community of Impendle as requested by UMDM. The water schemes are part of the Impendle bulk water supply project for the Impendle Local Municipality. This review and recommendations will focus on the design and implementation of the bulk works only. The Impendle Municipality’s topography predominantly comprises rolling hills, mountains and scattered settlements covering an area of 948 km². Due to the nature of the area topography and extended scattered settlements, two separate bulk water supply schemes are proposed. One bulk scheme will serve the north western part of the Municipality that includes communities from Stepmore to the Lotheni area. The second bulk scheme will provide water to the communities east (Figure 7.20). Stepmore The proposed scope for works to provide bulk water to schemes in the Stepmore, Lotheni and Inkangala areas is as follows: The proposed source for the scheme is a new river intake to be constructed on the Mkhomazi River. Raw water from this intake will be delivered to a proposed Stepmore Water Treatment Works (WTW), where the water will be purified. The WTW is situated on a green field site and will have a capacity of 69 kℓ/hr. From a high-lift pumpstation within the WTW site, purified water will be delivered through a clear water rising main to Lotheni 1 reservoir with a capacity of 1Mℓ. From Lotheni 1 reservoir a gravity main will convey water to Lotheni 2 Reservoir. From the Lotheni 1 and 2 reservoirs, distribution mains will convey the water by gravity to existing distribution networks in the areas of Stepmore, Inkangala and Lotheni. Umgeni Water will be responsible for the implementation of the Bulk Works from the Abstraction and Water Treatment Works to the Command Reservoir. Nzinga The proposed source for the scheme is a new river intake to be constructed on the uMkhomazi River. Raw water from this intake will be pumped to the proposed Nzinga Raw Water Pumpstation (NRWPS) located approximately 190 metres from the intake structure. From the NRWPS, raw water will be delivered through a 325/355 mm diameter x 7.6 km long rising main to the Nzinga WTW located on the same site as the existing WTW. The pipeline is designed to supply 275 kℓ/hr of raw water. The BWSS will be operated and maintained by Umgeni Water. Key information on this project is summarised in Table 7.12.

Beneficiaries The upgrade to the BWSS will benefit consumers within the Impendle Local Municipality with an estimated population of 37 000.

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Figure 7.20 General layout of the Impendle Project Areas.

Table 7.12 Project information: Impendle BWSS.

Project Components: Nzinga Waterworks The proposed plant has a capacity of 5.76 Mℓ/day with an abstraction capacity of 6.6 Mℓ/day. 355 mm diameter x 7.6 km long rising main.

1 Mℓ Nzinga Reservoir.

Stepmore Waterworks The proposed plant has a capacity of 1.66 Mℓ/day with an abstraction capacity of 1.78 Mℓ/day

1 Mℓ Lotheni 1 Reservoir.

650 kℓ Lotheni 2 Reservoir.

Construction of approximately 11,5 km of 100 mm diameter to 200 mm diameter

uPVC and steel pipelines.

Capacity: 15 Mℓ.

Implementation The construction duration of this project is anticipated to be six years. The total cost is estimated to be R200 million at 2016 prices.

Stepmore Project Area

Nzinga Project Area

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7.4.10 Vulindlela Upgrade

Planning No. 105.42

Project No.


Project Description The Vulindlela Bulk Supply System was handed over to the Msunduzi Municipality (MM) in 2013 as part of Umgeni Water’s rationalization strategy. Umgeni Water’s responsibility ends at the sales meters downstream of the Vulindlela Pump Station. Subsequent to the handover, the Vulindlela Rural Area has suffered from an insufficient and interrupted water supply. The Msunduzi Local Municipality requested Umgeni Water look at a more optimal bulk supply option for the Vulindlela BWSS to ensure an improved supply. The Vulindlela system (Figure 7.21) receives potable water from the Groenekloof Reservoir Complex (TWL of 1210.6 mASL) through two pumping systems via two bulk supply systems. The high level pumping system feeds two command reservoirs, namely, Reservoir 2 (TWL of 1410.2mASL) and Reservoir 5 (TWL of 1493.93mASL) and two additional reservoirs, Reservoir 3 and Reservoir 4. The low level pumping system only feeds command Reservoir 1. Potable water is then gravity fed from Reservoir 2 to Reservoirs 13 to 19, whilst potable water is gravity fed from Reservoir 5 to Reservoirs 6 to 12.

Figure 7.21 General layout of the Vulindlela System.

The Groenekloof Pump Station consists of three pumps, each with a design duty of 8.64 Ml/day at a Generated Head of 300m. The current operating philosophy is for two pumps as duty and one as

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standby, thus having a total duty capacity (theoretical) of 17.28 Ml/day. The pumps “hunt” on their curves due to the fact that they have to pump against two different system resistance curves along the same pipeline in their supply of water to Reservoir 2 and Reservoir 5. Key information on this project is summarised in Table 7.13 and illustrated in Figure 7.22

Figure 7.22 Vulindlela Upgrade.

Table 7.13 Project information: Vulindlela Upgrade.

Project Components: Upgrade the high lift pumping system at Vulindlela Pump Station by

installing 3 x 22 Ml/day pump sets (2 x operating and 1 x standby).

Augment existing rising main and construct a 650mm diameter pipeline of

11 km in length from Vulindlela Pumpstation to Reservoir 2.

Construct the Pumpstation at Reservoir 2 consisting of 2 x 18 Ml/day pump

sets (1 x operating and 1 x standby).

Construct one 15 Ml Reservoir (25 Ml required in total) at Reservoir 2 site

as additional storage to the existing 10 Ml reservoir.

Construct a back-feed pipeline of 200mm diameter with a length of 6 km,

from Reservoir 5 to supply Reservoir 3 and Reservoir 4.

Construct a 10Ml Reservoir at Groenekloof Reservoir Complex to comply

with Umgeni Waters Reservoir operating philosophy.


Institutional Arrangements The Umgeni Water BWSS will be operated and maintained by Umgeni Water.

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Beneficiaries The upgrade to the BWSS will benefit consumers within the Msunduzi Municipality and Vulindlela community.

Implementation The construction duration of this project is anticipated to be four years. The total cost is estimated at R280 million including the Groenekloof Reservoir as 2015 prices. The anticipated construction completion date is the end of 2018.

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7.4.11 Appelsbosch Emergency Scheme

Planning No. 105.

Project No.


Project Description The uMgungundlovu District Municipality requested Umgeni Water to assist in sourcing additional water for the drought stricken community of Appelsbosch in Ozwathini. A recommendation for a new raw water supply pipeline using the UMDM proposed Borehole, to augment the existing supply and alleviate the current water shortages being experienced by the community was made (Figure 7.23). Appelsbosch is currently supplied by a run of river abstraction from a small dam. Raw water is fed to the adjacent Appelsbosch Waterworks for treatment and distribution. The capacity of the plant is 1 Mℓ/day, but the current abstraction is only 400 kℓ/day due to the scarcity of water. The main consumers are the Appelsbosch Hospital and College and the hospital is battling with the reduced supply. No water is currently being distributed to the community at large who are now reliant on handpump boreholes, springs and taking water directly from streams. This is obviously not ideal and represents a major heath concern due to people exposed to water not fit for drinking.

Figure 7.23 Appelsbosch Emergency Scheme.

Table 7.14 Project information: Appelsbosch Emergency Scheme.

Project Components: Construct a 2km 160mm diameter steel pipeline

Equip borehole (UMDM)

Capacity: 0.4 Mℓ/day.

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Institutional Arrangements The Umgeni Water BWSS will be operated and maintained by Umgungundlovu Municipality.

Beneficiaries The augmentation will benefit the Appelsbosch Hospital.

Implementation The construction duration of this project is anticipated to be 1 month. The total cost is estimated at R5.6 million as at 2016.

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7.4.12 Table Mountain Upgrade

Planning No. 105.41

Project No.

Project Status Feasibility

Project Description uMgungundlovu District Municipality (UMDM) requested Umgeni Water (UW) to consider the augmentation of the existing Table Mountain supply infrastructure to meet current and future demand. The initial assessment indicated that the current infrastructure is inadequate to sustain current demand. The hydraulic analysis indicated that significant augmentation is required to meet current and future demands. Complete upgrade of the pumpstation, the bulk supply pipeline and a 4 Mℓ/day Reservoir is required to ensure an improved supply and greater assurance of supply over the next 20 years. A pre-feasibility study identified two possible scenarios to augment the supply to the Greater Table Mountain area. Scenario 1 entails the upgrade of the Lower Glenlyn Break Pressure Tank to a 2 Mℓ storage facility, replacing the existing Table Mountain pump sets with three new pump sets to meet the current and projected demand and construct a new 4 Ml Reservoir at Table Mountain. Scenario 2 entails a direct feed off the 750/650/500mm diameter pipeline from Belfort Reservoir, thus eliminating the need of augmenting the Glenlyn Break Pressure Tank. The other components, i.e, the pump station and Table Mountain Reservoir would be as per Scenario 1. A Detailed Feasibility Study (DFS) will be undertaken after these scenarios have been discussed with Umgeni Water Operations as well as the Planning and Operations Sections of Msunduzi Municipality. The above three scenarios will be tabled towards the end of March 2016 for discussion between Umgeni Water and Msunduzi Municipality. Key information on this project is summarised in Table 7.15.

Table 7.15 Project information: Table Mountain Upgrade.

Project Components: 350 Ø pipeline 4.4km in length. 4Mℓ Reservoir.

Capacity: 4 Mℓ.

Institutional Arrangements The infrastructure from the buy-back meter will be owned, operated and maintained by Umgeni Water.

Beneficiaries The upgrade to the BWSS will benefit consumers within the Greater Table Mountain area with estimated population of 13 500.

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Implementation The construction duration of this project is anticipated to be three years. The total cost is estimated to be R100 million at 2015 prices.

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7.4.13 Hydropower unit at the Mpofana outfall

Planning No. 609.2

Project No.


Project Description A Detailed Feasibility Study (DFS) to assess the viability of a Hydropower Unit on the Mooi-Mgeni Transfer Scheme (MMTS) was initiated in 2013. A cost benefit model was developed to investigate the benefit of installing larger pipe sizes under the second phase of the MMTS in the gravity section of the pipe from the Gowrie Break Pressure Tank to the Mpofana Outfall Site (Figure 7.24). It was identified that a 914mm diameter steel pipe had the highest Internal Rate of Return (IRR), and therefore is the optimal size for installation. The residual head available for power generation at the outfall site under full flow conditions for a new pipe scenario is 148m, and under aged pipe conditions is 128m.

Figure 7.24 Layout of the Mooi-Mgeni Transfer Scheme Phases 1 and 2.

The DFS has shown that a dual turbine powerhouse at the Mpofana Outfall Site, with twin turgo type turbines, each capable of discharging 2.25 m3/s at 148m head, can produce 2.698 MW each (5.396 MW total).

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Electrical transmission of the power generated will be fed back into the National Grid at the Gowrie Substation in Nottingham Road. The recoupment of costs will be offset against the power generated and billed to Umgeni Water, for the MMTS, by Eskom. A hydropower unit on the MMTS will recover between 19.7 and 16.8 GW.hr/annum of power, based on MMTS operation for 6 months of the year at 83% efficiency, and depending on the age of the supply pipelines.

Institutional Arrangements The new infrastructure will be owned, operated and maintained by Umgeni Water.

Beneficiaries The MMTS Hydropower Project is economically feasible with an expected payback period of 3 years. Thereafter the project will save Umgeni Water and hence consumers an estimated R10 million per annum at the current electricity tariff. This saving in the operating costs can be offset in the tariff, which will benefit all consumers within Umgeni Water’s area of jurisdiction.

Implementation The infrastructure is required by 2018. The total cost is estimated to be approximately R 78 million as at 2015 prices. Umgeni Water is currently negotiating with the Department of Water and Sanitation for access to their infrastructure. Once this permission is received then the hydropower unit can be designed and constructed.

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7.5 South Coast System

7.5.1 Nungwane Raw Water Pipeline

Planning No. 302.5

Project No. UI0657A

Project Status Tender (to be awarded mid-2016)

Project Description

Water demands from the Amazimtoti WTP supply area have consistently increased over the years with the AADD (12-month moving average) as at October 2015 equalling 49 Mℓ/day. The sustainability of the growing demand and the efficient utilisation of the existing infrastructure prompted the implementation of the South Coast Augmentation Booster Pump Station. The implementation of the South Coast Augmentation Booster Pump Station will only be able to sustain the total projected demand off Amanzimtoti WTP until the year 2020 with the support of the treatment of water at the Amanzimtoti WTP. The existing 450 mm diameter Nungwane Raw Water Pipeline (Figure 7.25), which supplies Amanzimtoti WTP with raw water, is in a poor condition due to the corrosive action by sulphur-reducing-bacteria and this pipeline now has to be replaced. The South Coast Augmentation Booster Pump Station may be used in the short to medium term in order to augment the potable water demands from the Amanzimtoti WTP whilst the raw water pipeline to the WTP is replaced. Key information on this project is summarised in Table 7.16.

Table 7.16 Project information: Nungwane Raw Water Pipeline.

Project Components: New 450mm diameter, 13.625km long steel pipeline


Figure 7.25 General layout of the Nungwane Pipeline.

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Institutional Arrangements The Nungwane Raw Water Pipeline will be owned, operated and maintained by Umgeni Water.

Beneficiaries The replacement of the existing Nungwane Raw Water Pipeline will benefit the residents of the Upper and Middle South Coast regions.

Implementation The construction duration of this project is anticipated to be one year and should be completed in June 2017. The total cost is estimated to be R105 million.

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7.5.2 South Coast Pipeline 2b – Kelso to Malangeni

Planning No. 305.09

Project No. UI0710A

Project Status Detailed Design (Completion Mid-2016)

Project Description The South Coast Pipeline (SCP) Project was initiated to extend the supply of water to the South Coast Region. The project is implemented in a phased approach, with Phase 1 and Phase 2a completed. The South Coast Phase 2b project will consist of four components:-

- Construction of a (2.7 km) pipeline from the offtake chamber at Scottburgh South Reservoir

(i.e. end point of SCP-1) to the start of the existing Kelso-Pennington pipeline (i.e. SCP-2a)

- Design and construction of a (5.35 km) pipeline from Kelso off-take point (i.e. end point of

SCP-2a) to a termination point at the inland side of the N2 (i.e. Malangeni off-take), west of

the Umdoni Reservoir

- Design and construction of the Mzinto River bridge crossing (550m)

- Design and construction of tie-in pipeline to Umdoni Reservoir

Kelso to Malangeni off-take Pipeline The South Coast Phase 2b (SCP-2b) route will tie-in to the South Coast Phase 2a pipeline and roughly follows the SANRAL servitude along the N2 south to Umdoni. This pipeline consists of a 800 mm diameter NB steel gravity pipeline with associated chambers and forms two parts extending southwards (Figure 7.26). This route includes minor stream crossings and a major bridge crossing over the Mzinto River. The pipeline will connect to the Mzinto River Bridge crossing on both the north and south banks of the bridge abutments. An off-take will be provided for a connection to the Umdoni Reservoir in the vicinity of the Malangeni off-take. Mzinto River Bridge Crossing This river crossing is over 550 m long and the valley is approximately 150 m deep at the centre of the bridge. Permission has been obtained from SANRAL to attach the required pipe to the deck of the N2 Umzinto River Bridge. This will provide a considerable saving to the overall project and will minimize any environmental impacts of crossing through the river or of the construction of a new pipe bridge. Off-take to Umdoni Reservoir Pipeline The pipeline will be designed and constructed on behalf of Ugu DM. Provision will need to be made for a booster pump station when the SCP is extended further to Hibberdene (i.e. SCP-3). Mnini Pump Station To sustain the demand downstream of Quarry Reservoir the level in the reservoir should be maintained between 70% and 90%. This would require two pumps operating during peak times. It is recommended that a third pump be installed at Mnini Pump Station so that a standby pump is available. The remainder of the South Coast Pipeline will ultimately be extended from Malangeni off-take (Umdoni) to Hibberdene once the Lower uMkhomazi Bulk Water Scheme is in place. The SCP will finally integrate with the Bhobhoyi WTP (near Port Shepstone) Supply Scheme in the vicinity of Hibberdene. The integration of the two schemes will provide a measure of operational flexibility. It

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will serve as a contingency for drought situations in either system. The Lower uMkhomazi scheme will provide an assured supply of water to the area without being reliant on the Lower Mgeni System. Key information on this project is summarised in Table 7.17.

Table 7.17 Project information: South Coast Pipeline Phase 2b.

Project Components: Section 1 – 2.7 km, 800mm nominal diameter steel pipeline (7.8mm wall thickness) including all ancillary works Section 2a - 4.96 km, 800 mm nominal diameter steel pipeline (7.8mm wall thickness) including all ancillary works Section 2b – Umzinto River bridge crossing – 390m 800 nominal diameter steel pipeline (9.3mm wall thickness to provide an additional factor of safety thereby reducing the likelihood of pipeline failure on this section of pipeline)

Capacity: 37.5 Mℓ/day

Institutional Arrangements The bulk supply infrastructure of the Kelso to Pennington link will be owned, operated and maintained by Umgeni Water, who will sell potable water from this system to Ugu District Municipality as per the Bulk Water Supply Agreement.

Beneficiaries The construction of the South Coast Phase 2b pipelines will alleviate the pressure on the Umzinto and the Mtwalume water treatment plants and supply system by supplying potable water directly to communities within the Umdoni Municipality.

Implementation The construction of this project is anticipated to be completed towards the end of 2017. The total cost is estimated to be approximately R 121 million excluding the Umdoni reservoir pipeline cost (2015 base year costs).

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Figure 7.26 General layout of the proposed South Coast Pipeline Phase 2b.

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7.5.3 Mhlabatshane Bulk Water Supply Scheme Phase 2

Planning No. 305.5

Project No. UI0712A

Project Status Feasibility Study (Completion Mid-2016 )

Project Description Umgeni Water is currently implementing a bulk water supply scheme as part of a larger regional scheme development by Ugu District Municipality, aimed at reducing water services backlogs in certain rural areas in the Umzumbe and Hibiscus Coast Local Municipalities. This scheme extends from Phungashe, within the Nhlangwini Tribal Authority in the north, to Assisi Mission, within the Shabeni Tribal Authority, in the south. It falls mainly within the Umzumbe Local Municipality, is bounded by Harry Gwala District Municipality in the north, the Mzimkulu River in the west and south, the Umzumbe River in the east, and the Shabeni and KwaMadlala areas of the Hibiscus Local Municipality in the south. The bulk component of the scheme comprises of a dam on the Mhlabatshane River (a tributary of the Mzumbe River), from where water is pumped to a 4 Ml/day WTP situated in close proximity to the command reservoir (Figure 7.27). Potable water is sold to Ugu District Municipality from a command reservoir for reticulation through an extensive gravity-fed network to the various communities in the area. Some of the reticulation components currently exist as stand-alone schemes, with the remainder still to be installed. When water demands from this scheme exceed the firm yield of the dam, then the intention is to develop the second phase of the project. Water will be abstracted directly from the Mzimkhulu River, pumped to the WTP (which will need to be upgraded to 8 Ml/day) and then fed into the reticulation system via a command reservoir.

Figure 7.27 General layout of the Mhlabatshane BWSS.

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Water will be abstracted directly from the Mzimkhulu River, pumped to the existing WTP (which will need to be upgraded) and then fed into the reticulation system via a command reservoir. Key information on this project is summarised in Table 7.18.

Table 7.18 Project information: Mhlabatshane BWSS Phase 2.

Project Components: Abstraction weir and abstraction works on the Mzimkulu River, with de-silting mechanism Raw water pump station and associated electrical and mechanical works Raw water rising main Raw water intermediate/booster pump-stations and associated electrical and mechanical works Balancing tanks / reservoirs The existing 4 Mℓ/day water treatment works is to be upgraded to an 8Mℓ/day plant, which includes a clear-water pump station Command Reservoir increase from 2Mℓ to 4Mℓ in storage capacity

Capacity: 8 Mℓ/day in total

Institutional Arrangements Umgeni Water will own, operate and maintain the bulk water supply components of the Scheme. Ugu District Municipality will own, operate and maintain all reticulation components of the Scheme.

Beneficiaries Phase 1 serves approximately 67,000 people and it is anticipated Phase 2 will serve 100,000 people in total.

Implementation The total estimated capital cost for Phase 2 is R500 million (2015 base year costs). The project is currently in the detailed feasibility and preliminary design stage.

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7.5.4 Lower uMkhomazi Bulk Water Supply Scheme

Planning No. 305.7

Project No. UI0701A

Project Status Feasibility Study (Completion Mid-2016)

Project Description The Upper and Middle South Coast will need augmentation after 2017 when the water requirement is projected to exceed existing bulk water infrastructure and local resources (Figure 7.28). The proposed scheme is thus a critical solution to securing water supply for the South Coast Region

Figure 7.28 Water Balance Upper and Middle South Coast.

An investigation at a detailed feasibility level and preliminary design is due for completion during 2016. The optimum configuration, sizing, phasing and costing of all infrastructures required for the proposed Lower uMkhomazi Bulk Water Supply Scheme (BWSS) have been determined (Figure 7.29). The project (Figure 7.29) comprises of two abstraction weirs and works, Ngwadini Off-Channel Storage dam and related water treatment and conveyance infrastructure located within the Lower uMkhomazi River catchment. The water supply scheme will be used to supply an estimated future AADD of 100 Mℓ/day to the Upper and Middle South Coast. In the high flow summer months, raw water will be abstracted from the uMkhomazi River and stored in a 10 million m3 OCS dam, for usage during the dry winter months. During summer the WTP will be supplied with raw water from abstracted directly from the river at Goodenough.

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In winter, water will be released back into the uMkhomazi River and abstracted at the downstream Goodenough weir. Raw water will be pumped from this weir to a 6 hour raw water storage reservoir, and then gravity fed to the WTP. The Quarry Reservoir has been identified as the tie-in point to the South Coast Pipeline; all treated water from the WTP will be stored and distributed from this reservoir. All infrastructures will be designed to handle daily, as well as seasonal variations and peaks. Key information on this project is summarised in Table 7.19.

Table 7.19 Project components and AADD capacity for the Lower uMkhomazi BWSS.

Project Components: Ngwadini Weir (2.5 m high), abstraction and low lift pump station for the OCS dam located on the uMkomazi River Hydrocyclones desilting mechanisim (0.75 m

3/s)

Pressurised pipeline to OCS dam (0.75 m

3/s)

Ngwadini OCS Dam (10.5 million m

3/annum) located adjacent to the

uMkomazi River Goodenough Weir (raised from 3 to 3.5 m high), abstraction and low lift pump station for the WTW located on the uMkomazi River Hydrocyclones desilting mechanisim (1.3 m

3/s)

High lift pump station (1.3 m

3/s)

Pressurised pipeline to Goodenough Reservoir (6 hours) Gravity pipeline to WTP (1.2 m

3/s)

WTP (100 Ml/d) Gravity pipeline to Quarry Reservoir (1.2 m

3/s)

Electrical sub-station (132 kV/22 kV), transmission and conveyance infrastructure A solution to deliver water at the lowest possible overall cost, and with the least environmental impact to the South Coast area


Institutional Arrangements The new infrastructure will be operated and maintained by Umgeni Water and will be part of the Bulk Supply agreement with the relevant stakeholders.

Beneficiaries The will benefit the residents of the Upper and Middle South Coast regions.

Implementation The infrastructure is required by 2020 to meet the increasing demands within the supply area. The total cost is estimated to be R2.9 billion (2015 base year costs).

Figure 7.29 Proposed Lower uMkhomazi BWSS.

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7.6 North Coast System

7.6.1 uMshwathi Regional Bulk Water Supply Scheme

Phase 4 (Southern Ndwedwe Bulk Water Supply

Scheme )

Planning No. 204.18

Project No. UI0701A

Project Status PH1 - Pre-Feasibility study –completed. PH 2 - Detailed Feasibility Study – completed. Design Brief – To be completed by end April 2016.

Project Description Umgeni Water (UW) initiated a detailed feasibility study (DFS) to consider whether there were any feasible bulk water supply options in the Greater Southern Ndwedwe area that could:

In particular, provide an alternative, more reliable source of potable water for the stand-

alone rural water supply schemes that rely to a large extent on protected springs, boreholes

or run-of-river abstraction, and that continue to present operational and financial challenges

for the municipality; and

In general, provide an adequate supply of potable water to meet the growing needs of the

area.

Umgeni Water completed a detailed feasibility study (DFS) at the end of November 2015. The locality map of the study area is shown in Figure 7.30. It is dominated by the central and southern parts of the Ndwedwe Local Municipality (KZN293), which is predominantly rural in nature with dispersed settlement patterns. The blue outlined area shows the Ndwedwe Local Municipality (KZN293) in relation to the other local municipalities of iLembe District Municipality. Ndwedwe is the southernmost of the four local municipalities within iLembe and is landlocked. The study area comprises the central and southern parts of the Ndwedwe Local Municipality and occupies roughly 50% of the total area of Ndwedwe Municipality. This is shown in outline in the inset map on Figure 7.30. Within the study area the proximity of neighbouring eThekwini and the Dube Tradeport are the major economic drivers leading to densification in the southern parts of the study area. The area immediately around Montebello Hospital is another minor growth mode. The remainder of the study area is predominantly rural in nature with dispersed settlement patterns.

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Figure 7.30 Study area for uMshwathi BWSS Phase 4.

The DFS determined that the proposed source of water for the southern Ndwedwe water supply scheme is the uMshwathi Bulk Water Supply Scheme (MBWSS). The MBWSS is supplied with water from the DV Harris Waterworks in Pietermaritzburg. One of the terminal points, the Dalton Reservoir, will be the supply node to the Nondabula and Montebello reservoirs, whereas the Bruyns Hill Reservoir, another terminal point of the MBWSS, will be the supply node to the Swayimane area and the western parts of the southern Ndwedwe area. With this as the basis, the name of the Southern Ndwedwe BWSS was changed to the uMshwathi Regional Bulk Water Supply Scheme Phase 4 (MRBWSS 4) to coincide with the RBIG application of the entire MBWSS. It was confirmed that the MRBWSS design has allowed for 25 Mℓ/day of potable water to be available at the Nondabula Reservoir for distribution to consumers in both northern and southern Ndwedwe areas. The Bruyns Hill Reservoir, another terminal point of the MBWSS, will be the supply node to the Swayimane and the western parts of the southern Ndwedwe area. The DFS confirmed that 12 Mℓ/day of potable water will be made available at the Bruyns Hills Reservoir for distribution to consumers in the greater Swayimane area and the western parts of the southern Ndwedwe area.

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Figure 7.31 shows an overview of the proposed infrastructure. This will ensure that all backlogs within the Greater Ndwedwe area are covered. It will also relieve the supply of the Hazelmere BWSS by allowing a back-feed to the existing Ndwedwe Reservoir 4.

Figure 7.31 Proposed infrastructure of the uMshwathi BWSS Phase 4.

Institutional Arrangements Umgeni Water will own, operate and maintain the infrastructure of the uMshwathi Regional Bulk Water Supply Scheme Phase 4 (MRBWSS 4) and will sell potable water from this system to the iLembe District Municipality as per the Bulk Water Supply Agreement.

Beneficiaries The MBWSS 4 will supply both rural and peri-urban settlement areas. The population that will be supplied by this scheme is presented in Table 7.20.

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Table 7.20 Rural demand to be supplied by the uMshwathi BWSS Phase 4 by 2045

based on a medium growth scenario.

Rural Supply Area Population

Oswathini – extended boundary

149 722

Southern Ndwedwe 110 142

Msilili and Tafamasi 52 872

TOTAL 213 606

Implementation The anticipated completion date for the Detailed Feasibility Study is October 2015.

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7.6.2 Lower Thukela Bulk Water Supply Scheme

Planning No. 204.19

Project No. UI0302A


Project Description The town of KwaDukuza and the KwaZulu-Natal North Coast are expected to experience high growth within the next five years (Sections 3.3.4 and 5.5.2). The Mvoti WTP, which supplies KwaDukuza is limited by its size and the availability of raw water from the Mvoti River to delivering approximately 16Mℓ/day. The raising of Hazelmere Dam (Section 4.4.3) together with the upgrade of the Hazelmere WTP will not be able to supply the estimated demand on the north coast within the next five years (Section 5.5.3). Further augmentation of the bulk water supply to the KwaDukuza area and the KwaZulu-Natal North Coast is therefore required in the medium to long-term. DWS have confirmed that there is up to a maximum of 110 Mℓ/day of raw water available from the uThukela River for supply to the North Coast areas. The proposed scheme will abstract water directly from the uThukela River in the vicinity of Mandini for treatment at a WTP situated in close proximity to the abstraction works (Figure 7.32). Bulk potable water can then be supplied from the WTP southwards to the KwaDukuza area and into the existing North Coast Supply System, as well as northwards to portions of the Mandini Local Municipality. This scheme will be developed in a phased manner to match the growth in demands in these areas. It will be able to supply the rural areas of Bulwer, San Soucci and St Christopher and will also supply the towns of Darnall, Zinkwazi and Blythedale in the KwaDukuza Municipality and new developments in the central Mandini Municipality area. Key information on this project is summarised in Table 7.21.

Table 7.21 Project information: Lower Thukela BWSS.

Project Components

Weir and 120 Mℓ/day abstraction works on the uThukela River.

120 Mℓ/day De-silting works.

WTP initially sized to 55 Mℓ/day and ultimate 110 Mℓ/day.

Pump stations and 31 km of 950 mm diameter bulk supply pipelines to deliver water

from the WTP to KwaDukuza Municipality (and ultimately to Mandini).

30 Mℓ Command Reservoir

Capacity Initial Capacity 55 Mℓ/day Ultimate Capacity 110 Mℓ/day

Figure 7.32 Lower uThukela Bulk Water Supply Scheme.

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Institutional Arrangements Umgeni Water will own, operate and maintain the infrastructure of the Lower Thukela BWSS and will sell potable water from this system to the iLembe District Municipality as per the Bulk Water Supply Agreement.

Beneficiaries The beneficiaries of this scheme will be the town of KwaDukuza and the areas of the North Coast region as well as areas of the Mandini Municipality. The scheme will also supply the rural areas of Bulwer, San Soucci and St Christopher and the towns of Darnall, Zinkwazi and Blythedale in the KwaDukuza Municipality. Supply from the LTBWSS could ultimately extend as far as Sembcorp Siza Water’s supply area.

Implementation The detailed design of the Lower Thukela Bulk Water Supply Scheme is complete and the construction of the gravity pipeline from Mvoti Balancing Reservoirs to Mvoti Reservoir is complete. The scheme is expected to be commissioned in June 2016. The estimated total cost of the project to completion in 2016 is estimated to be R1.32 billion.

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7.6.3 Maphumulo Bulk Water Supply Scheme

Planning No. 204.22

Project No. UI0307A / UI0307B / UI0307C / UI0307D / UI0308A

Project Status Phase 1 – Imvutshane River Abstraction, pumpstation and raw water rising main, 6 Mℓ/day WTP, bulk pipelines and reservoirs - Complete Phase 2 – Imvutshane Dam - complete Phase 3 – WTP upgrade to 12 Mℓ/day – Planning Phase 4 – Abstration from Hlimbitwe River and raw water pipeline to Imvutshane Dam

Project Description This scheme supplies the communities in Maphumulo, Maqumbi and Ashville from the iMvutshane River. This river is a tributary of the Hlimbitwa River (which in turn is a tributary of the Mvoti River) and is situated approximately 10km south of Maphumulo Town. The construction of a run-of-river abstraction works on the iMvutshane River and 6 Mℓ/day WTP has been completed as part of Phase 1 of the project and was commissioned in August 2013. Phase 2 of the project, which is the construction of the iMvutshane Dam on the iMvutshane River (Figure 7.33), was commissioned in March 2015. Future phases to the scheme include :

Phase 3 : Upgrade to WTP by 6 Ml/day to new treatment capacity of 12 Ml/day and

upgrading the raw water and potable water pumps;

Phase 4 : New weir, abstraction works, pump-station on the Hlimbitwe River and pipeline to

convey raw water into the iMvutshane Dam to meet the future 12 Ml/day demand.

Key information on this project is summarised in Table 7.22.

Figure 7.33 Maphumulo Bulk Water Supply Scheme.

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Table 7.22 Project information: Maphumulo BWSS.

Project Components

Phase 1 Imvutshane River Abstraction, pump station and raw water rising main, 6 Mℓ/day WTP, bulk pipelines and reservoirs. Phase 2 3.2 million m

3 iMvutshane Dam.

Phase 3 Upgrade of the WTP to 12 Mℓ/day and new pumps. Phase 4 Weir and abstraction from Hlimbitwe River, pumpstation and pipeline to Imvutshane Dam.

Capacity Phase 1: 6Mℓ/day Phases 2, 3 &4: 12Mℓ/day

Institutional Arrangements Umgeni Water will own, operate and maintain the infrastructure of the Maphumulo BWSS and will sell potable water from this system to the iLembe District Municipality as per the Bulk Water Supply Agreement.

Beneficiaries The Maphumulo BWSS will supply both rural and peri-urban settlement areas. The population that will be supplied by the Maphumulo BWSS is presented in Table 7.23.

Table 7.23 Rural demand to be supplied by the Maphumulo BWSS (MSW 2008).

Rural Supply Area Population

Maphumulo 4 872

Maqumbi (Phase 1) 26 280

Masibambasane CWSS 17 248

Kwa Sizabantu 17 192

Ngcebo 2 72 900

Ashville 11 264

TOTAL 149 756

Implementation Phases 1 and 2 of the Maphumulo BWSS have been completed. Due to the low flows in the iMvutshane River, an emergency scheme was implemented in 2015. This supplied water from the Hlimbitwa River to the existing abstraction point on the iMvutshane River. Phase 3 is estimated to be completed by 2018 with Phase 4 in 2020. The estimated total cost of phases 3 and 4 of the project, is R132 million.

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7.7 East Coast Desalination Plant

Planning No. 601.3.2

Project No. UI0501A

Project Status Detailed Feasibility Planning Complete (as at December 2015)

Project Description The future growth in water demand expected in eThekwini Municipality, iLembe District Municipality and Ugu District Municipality will exceed the required assured yield of the Mgeni, Hazelmere and South Coast Systems. An alternative source of water will be required to augment the existing systems so that the risk of non-supply can be mitigated. One of the options being considered, to augment the existing systems, is the construction of one or two large scale seawater desalination plants. A Detailed Feasibility Study (DFS) of two 150 Mℓ/day desalination plants was completed in July 2015 and provided the information and detailed cost estimates necessary to establish the viability of constructing one or more of the desalination plants as an alternative to implementing the uMkhomazi Water Project. Preliminary results show that a plant positioned near the Lovu River on the KwaZulu-Natal South Coast could supply up to 75 Mℓ/day to the southern areas of eThekwini Municipality and a further 75 Mℓ/day to the northern areas of Ugu District Municipality. Similarly, a plant positioned at Desaniger near Tongaat on the KwaZulu-Natal North Coast will be able to supply 75 Mℓ/day to the northern areas of eThekwini and a further 75 Mℓ/day to the southern areas of iLembe District Municipality. A decision has subsequently been taken to focus solely on the Lovu River plant as the Desaniger plant is not required in the short to medium term as a result of the Lower Thukela Bulk Water Supply Scheme, which will be completed in mid-2016 and the proposed uMkhomazi Water Project (2024) that will supply the area. Key information on this project is summarised in Table 7.24.

Table 7.24 Project information: East Coast Desalination Plants.

Project Components

150 Mℓ/day Desalination Plant near the Lovu River on the KwaZulu-Natal South

Coast

Capacity 150 Mℓ/day Plant

Institutional Arrangements Various institutional arrangements are being investigated as part of the DFS and Umgeni Water would use this information to decide on an appropriate institutional arrangement if one or both of these plants were to be constructed.

Beneficiaries The Southern East Coast Desalination Plant would provide up to 75 Mℓ/day to Ugu District Municipality and up to 75 Mℓ/day to the southern areas of eThekwini Municipality thereby shedding load from the Amanzimtoti and Wiggins Water Treatment Plants.

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Implementation The detailed feasibility study was completed in July 2015 and an economic analysis is currently being undertaken to identify whether the Desalination Plant at the Lovu River should be constructed as an alternative to the Lower uMkhomazi Bulk Water Supply Scheme. If feasible the desalination plant could be constructed by 2021 if required.

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7.8 Elysium Desalination Plant

Planning No. 601.6

Project No. UI0911A


Project Description The Elysium Desalination Project is a green field development intended to supplement potable water supplied by the Mtwalume Water Treatment Plant (WTP) where the demand for potable water regularly exceeds the capacity of the raw water resource during the dry season. The Elysium Desalination Project would discharge to the inlet of the Elysium Reservoir and this will be the only interface with existing bulk water supply infrastructure in the area. Due to poor availability of suitable fresh water resources in this region, desalination of sea water is considered the most reliable alternative source of water to supplement the output of WTP. The required potable water supply capacity of this initial phase is 2.5 Mℓ/d. Future development is anticipated in two or more future phases to an ultimate supply capacity of 10 Mℓ/d. It is necessary for the design of this initial phase to include for the anticipated future developments at lowest overall lifecycle cost. This will mean that certain components of the system may need to be designed at the outset, for the ultimate capacity of 10 Mℓ/d and that space must be reserved, in the initial site layout, for anticipated future development. Key information on this project is summarised in Table 7.25.

Table 7.25 Project description: Elysium Desalination Plant.

Project Components

Bulk Infrastructure Components (10 Mℓ/day) Sea water intake and abstraction system (includes raw water pump station).

Raw water rising main and brine disposal pipelines.

Potable water delivery main and pump station.

Treatment Plant Components (2.5 Mℓ /day) Desalination Plant – to be located at Elysium with an initial capacity of

2 Mℓ/day and allowance for further modules to increase capacity to 10 Mℓ/day.

Capacity 2.5 Mℓ/day

Institutional Arrangements The Elysium desalination plant is situated in Ugu District Municipality (DM). Umgeni Water will own, operate and maintain the plant and will sell potable water from this system to the Ugu DM, as per existing bulk water supply agreements.

Beneficiaries The scheme will serve consumers in the Ugu District Municipality.

Implementation The extent of the Project includes all components necessary for implementation and operation of the bulk water supply system including location, design, specification, procurement, construction, operation, maintenance and repair over the project life cycle.

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The Project comprises the following main physical components:

A Sea Water Abstraction System to provide raw sea water to the treatment works for

processing,

An Effluent Discharge System for safe disposal of brine and treated effluents,

A Sea Water Reverse Osmosis (SWRO) Desalination plant including all necessary support

processes for :

o Raw water pre-treatment

o SWRO Modules

o Cleaning processes and chemical storage

o Effluent Treatment

o Post-treatment to UW Potable Water standards

A Pump station and Rising Main to elevate water from the treatment works to the existing

Elysium Reservoir.

All necessary facilities, utilities and infrastructure for construction and subsequent operation

of all of the installed plant.

The estimated cost of the entire project is in the order of R 110 million at 2015 prices. This is made up of all capital infrastructure costs and professional fees.

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7.9 Darvill Wastewater Works Upgrade

Planning No. 104.1

Project No. UI0665A


Project Description The Darvill Wastewater Works (WWW) serves the city of Pietermaritzburg and surrounding communities. All water borne sewage flows by gravity or is pumped to Darvill, with the exception of a small community in Lynnfield, which has its own water borne sewage that is treated by the Lynnfield WWW (Section 6.4). There are, however, large areas of the city that are not served by the sewer reticulation network that are reliant on on-site sanitation system e.g. septic tanks and pit latrines. The extent of Darvill’ s water borne sewer catchment area is illustrated in Figure 7.34. Darvill WWW is thus of strategic importance to the city and to the environment at large as the quality of the effluent discharged needs to comply with regulations.

Figure 7.34 Darvill Catchment (Current).

Demand was exceeding the treatment capacity of the works and a capacity upgrade was therefore required. It was also determined through process evaluations that the current process was inadequate and needed to be adapted.

The wastewater works is being upgraded from 65 Mℓ/day to 100 Mℓ/day to meet current and future demands. This is comprehensive upgrade with the majority and the processes and infrastructure being impacted upon. Details of the process upgrades are given in Table 7.26.

457

The present method of disposal of sludge by spray irrigation to land is operating adequately, but has its limitations especially as the capacity of the works increases to cope with growth. Alternative methods of sludge treatment and disposal are being investigated in order to determine the optimal future disposal strategy. A feasibility report, which looks at the management and disposal of sludge produced by the works, has been completed and the following recommendations have been included in the proposed upgrade:-

Refurbish the existing Gravity Thickeners

Construct a new sludge treatment building with mechanical thickening of waste activated sludge and digester sludge dewatering plant.

Construct a new sludge sump for blending thickened primary and waste activated sludge and new digester feed pump station

Construct two new “Egg-Shaped” digesters. Key information on this project is summarised in Table 7.26.

Table 7.26 Project information: Darvill Wastewater Works Upgrade.

Project Components

Inlet Works o New inlet works design to handle a maximum flow of 200 Mℓ/day in 4

channels. o Two mechanical screens in each channel

Fat, Oil, Grease (FOG) and Grit Removal o Additional unit process because of high FOG loads in influent o 200 Mℓ/day in 3 lanes

Primary Settling o Additional 40 m PST added

Settled Sewage Pump-Station o The SSPS replaces the existing “Main Pump Station” which has reached

its design life o 3 duty, 1 standby and 1 spare

Biological treatment o Convert the existing anaerobic reactor to an activated sludge selector o Convert the existing Aerobic Reactor to an Anaerobic / Anoxic reactor o Construct a new deep basin reinforced concrete Aerobic Reactor with

fine bubble diffused aeration(40 150 m3)

Air for Biological Treatment o Blower House o 4 x 645 kW Blowers each with a rated delivery of 7 m

3/sec @ 90 kPa

o Air Header Mains o 22 680 diffusers in three aeration lanes

Secondary Settling o 2 x 35 m diameter secondary settling tanks

Anaerobic Sludge Digesters o 2 x 4500 m

3 digesters

Wash Water Treatment o Construct 2 Mℓ/day wash water / reclamation plant

o Unit processes will include disc filters, coagulation/flocculation, Ozonation granular activated carbon, ultra-filtration and hydrogen peroxide addition.


458

Institutional Arrangements Umgeni Water owns and operates the plant and is funding the project internally. The Msunduzi Municipality is charged a monthly tariff for discharging the city’s wastewater to Darvill.

Beneficiaries The Msunduzi Municipality is the main beneficiary of the upgrade as it will remove the constraint to development in the city.

Implementation The R940 million project is currently being constructed and is due for completion towards the end of 2016.

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7.10 Mphophomeni Wastewater Works Upgrade Planning No. 610.1

Project No. UI0801A

Project Status Detailed Design Complete

Project Description The Mpophomeni Wastewater Works (WWW) is currently not operational and sewage from Mphophomeni Township is pumped to Howick WWW for treatment. The demand at Mphophomeni has increased to the extent where the flow exceeds the volume of effluent that the Howick WWW can treat. Additionally there are a number of planned developments that will increase this flow significantly over the next few years. It was therefore proposed by the Umgungundlovu District Municipality that the Mphophomeni WWW be upgraded to treat 6 Mℓ/day with the possibility of upgrading the works to 12 Mℓ/day. The site has space for a plant of at least 20 Mℓ/day (Figure 7.35). The following development initiatives by the municipality will be serviced by the Mpophomeni WWW, viz:

Refurbishment of the existing sewage reticulation system in Mpophomeni Township will increase wastewater flows to the works (ADWF 3.6 Mℓ/day),

The development of the Khayelisha social housing development on the banks of Midmar Dam (ADWF 1.3 Mℓ/day), and

Planned light/mixed industrial development park (3 Mℓ/day)

The effluent from the works will be pumped and disposed of to the Sakubula stream adjacent to the

national road (N3) in Howick. The pumping main will be approximately 6.8 km in length and of

various diameters.

Key information on this project is summarised in Table 7.27.

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Table 7.27 Project information: Mphomphomeni Wastewater Works Upgrade.

Project Components

Inlet Works including a mechanical screen and vortex grit tanks (2No).

Two 14 m diameter primary settling tanks.

Primary sludge pump station.

Refurbished digesters with new heating and sludge circulating system.

Mechanical equipment to dewater digested primary and activated sludge.

6 Mℓ/d (BNR Activated Sludge Treatment Plant.

Return Activated Sludge (RAS) pumping system.

Waste Activated Sludge (WAS) pumping system.

RAS and Storm Flow Recycle Refurbished Pump Station

Sludge and Storm Flow Recycle Mechanical/Electrical Plant.

Refurbished 2.25 Mℓ Storm bypass pond.

One 25 m diameter secondary clarifier.

One refurbished 18 m diameter secondary clarifier.

Aluminium sulphate, lime and chlorine chemical dosing systems.

Recycle pump station, pumping plant and pumping main from Maturation Ponds.

Disposal pipeline (6.8 km) of various diameters.

Pump station (2 duty, 1 stand-by)


Institutional Arrangements Umgeni Water will in future operate the plant on behalf of the Umgungundlovu District Municipality under a twenty year management contract. Umgeni Water is responsible for funding any capital improvements required by the plant. Umgeni Water charges a monthly management fee to the Municipality to cover all operation and maintenance costs as well as capital redemption.

Beneficiaries The Umgungundlovu District Municipality and Mngeni Local Municipality are the main beneficiaries of the upgrade.

Implementation The project is in the tender phase and once awarded will take approximately a year to complete. The estimated cost of the project is R151 million.

Figure 7.35 Mpophomeni WWW Scheme Footprint.

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WRC. 2010. Development of a Practical Methodology for Assessing the Potential Impacts of Climate Change on the Yield Characteristics of Reservoirs. Draft Report for Water Research Commsion Project K8/870/1. Authors: Gerber, A, De Jager, FGB and Strydom, C. WRP. 2007. Mooi-Mgeni River Transfer Scheme Phase 2: Feasibility Study: Bridging Study No. 5: Stochastic Hydrology and Determination of Yield and Transfer Capacity of the Mooi-Mgeni Transfer Scheme (MMTS) and Operating Rules of the Mooi and Mgeni Systems with the MMTS in Place. Department of Water Affairs and Forestry, Directorate: Options Analysis. Report No. WMA 07/V20/00/1807. Authors: Schäfer, NW, De Jager, FGB and Van Rooyen, PG.

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ACKNOWLEDGEMENTS Umgeni Water’s comprehensive 2015 Infrastructure Master Plan has been updated and improved to produce this 2016 version. The concerted effort of the Planning Services Department as a whole in producing this document is acknowledged and appreciated. Specific contributions by the various team members deserves acknowledgement: Graham Metcalf (Geohydrologist) for managing the entire project, updating the groundwater sections and preparing the sections on wastewater, reclamation and desalination and Alka Ramnath’s (Planner) contribution in assisting with the management of the project process, writing Section 2 of this report, preparing a number of the maps and assisting with editing the two volumes, was substantial. Without such valuable input the project would not have been possible. Planning Engineers Gavin Subramanian (North), Angus Nicoll (South and Central), Vernon Perumal (Harry Gwala) and Reshina Maharaj (Inland) updated the various components relating to the water supply infrastructure plans and projects. Sandile Sithole (Hydrologist) and Sakhile Hlalukane (Hydrologist), updated the various sections relating to the water resource regions in Volume I. Ntombifuthi Vilakazi (Planning Analyst) revised the section on climate change. Tatum Donnelly (Administrator) kept the department functioning smoothly throughout the project. The 2016 Infrastructure Master Plan was not completed by the abovementioned people without the valued assistance of numerous other staff members within Umgeni Water. Their contributions are gratefully acknowledged. Operations Division staff provided assistance in updating and confirming infrastructure information. The Water and Environment Department kindly provided updated information on water quality within the various water resource regions in Section 4, and Process Services supplied the process and treatment details for each of the water treatment plants in Section 5. Finally, last but not least to the GIS Department; Brent Steyn (GIS Coordinator), Dani Vather and Sindi Ngubane for updating and re-formatting all of the IMP maps. Kevin Meier, PLANNING SERVICES MANAGER