G R E A T E R B U L W E R by sdsdfqw21

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									7.20            G   R E A T E R           B   U L W E R   /D   O N N Y B R O O K   B   U L K

                W    A T E R      S   U P P L Y      S    C H E M E

7 . 2 0 . 1     P   R O J E C T       D   E S C R I P T I O N


Planning No.:           115.0

Project No.:

Vote No.:



The proposed Greater Bulwer/Donnybrook Bulk Water Supply scheme is located
within the Ingwe Local Municipality of the Sisonke District Municipality.


The project entails the construction of a dam, raw water pump station and rising
main, WTP, storage reservoirs and bulk distribution pipelines. This bulk water supply
scheme will provide a sustainable water service to the greater Bulwer, Gala,
Nkwazela and Donnybrook areas. The current WTP in Bulwer only has the capacity
to supply the water demands of the town. The remaining areas have either
rudimentary schemes that provide a basic level of service or no water services at all.
The bulk water scheme is thus seen to be the long-term solution to water services for
the Bulwer to Donnybrook corridor.


A detailed feasibility study has been completed for the dam on the Luhane River in
the vicinity of Bulwer. A reconnaissance level study, that has been completed for the
proposed bulk water supply scheme, recommends that the scheme be implemented
in four phases as follows:


         Phase 1:        Storage dam, abstraction works, raw water rising main, WTP,
                         bulk storage reservoir and a pipeline to Gala.
         Phase 2:        Nkwazela Reservoir, and a pipeline from Gala Reservoir to
                         Nkwazela Reservoir.
         Phase 3:        Donnybrook Reservoir and a pipeline from Nkwazela Reservoir
                         to Donny Brook Reservoir.
         Phase 4:        Pipeline from Gala off-take to Bulwer (existing WTP).


Key information on this project is summarised in Table 7.21.




                                                    430
       Table 7.21          Project information: Greater Bulwer/Donnybrook BWSS.

Project Status:             Planning (March 2010)

Project Components:         Dam, raw water pump station, WTP, pipelines and reservoirs

Capacity:                   11 Ml/day



7 . 2 0 . 2       I   N S T I T U T I O N A L       A   R R A N G E M E N T S

The institutional arrangements of the proposed scheme are yet to be finalised.
Possible arrangements are as follows:


   • The proposed scheme will be operated and maintained by Umgeni Water. Bulk
       water contracts will be entered into with Sisonke District Municipality.
   • The proposed scheme is operated and maintained by Sisonke District
       Municipality.
   • The proposed scheme is jointly operated and maintained by Umgeni Water and
       the Sisonke District Municipality.



7 . 2 0 . 3       B   E N E F I C I A R I E S

The long-term demands of the scheme were calculated at 11Ml/day by a previous
study commissioned by Sisonke District Municipality. Future beneficiaries are shown
in Table 7.22.


       Table 7.22          Future beneficiaries for the proposed Greater Bulwer
                           BWSS.
                  Area                     Current               Projected Long-Term Water
                                          Population            Demand Ml/day (AADD) (2037)
    Bulwer                                    565                            0.5
    Bulwer to Donnybrook Corridor           61000                            10
    Donnybrook                               1920                            0.5



7 . 2 0 . 4       I   M P L E M E N T A T I O N

Planning of the bulk water supply system still has to be conducted. Once the design
is complete the project should take about three years to implement.




                                                 431
Figure 7.22   General layout of the Greater Bulwer/Donnybrook BWSS.




                                                           432
7.21              S   O U T H       C   O A S T         A       U G M E N T A T I O N

                  B   O O S T E R           P   U M P       S   T A T I O N

7 . 2 1 . 1       P   R O J E C T       D   E S C R I P T I O N


Planning No.:               305.6

Project No.:

Vote No.:



Due to water resource constraints at Nugwane Dam supplying the Amanzimtoti WTP,
it is necessary to augment the supply to areas downstream of the Amanzimtoti WTP
with flows from Wiggins WTP via the South Coast Augmentation Pipeline, until such
time a new regional bulk water supply system is developed in the lower reaches of
the Mkomazi River (Section 5.4.2). The Wiggins WTP has sufficient treatment and
distribution capacity to meet the short to medium-term demands of Amanzimtoti and
the South Coast Pipeline. The existing South Coast Augmentation Pipeline has
adequate capacity to meet current and projected demands up to the year 2020,
provided that a new in-line booster pump station is installed on the South Coast
Augmentation Pipeline to replace the existing Umlazi Pump Station (Figure 7.23).


Key information on this project is summarised in Table 7.23.


       Table 7.23          Project information: South Coast Augmentation Booster
                           Pump Station.

Project Status:             Construction (March 2010).

Project Components:         New in-line booster pump station.

Capacity:                   120 Ml/day.




7 . 2 1 . 2       I   N S T I T U T I O N A L           A     R R A N G E M E N T S

The new South Coast Augmentation Booster Pump Station will be operated and
maintained by eThekwini Municipality.




                                                        433
Figure 7.23   General layout of the South Coast Augmentation Booster Pump Station.




                                                            434
7 . 2 1 . 3    B   E N E F I C I A R I E S

The commissioning of the South Coast Augmentation Booster Pump Station will
benefit the residents of the Upper and Middle South Coast Region.



7 . 2 1 . 4    I   M P L E M E N T A T I O N

The construction duration of this project is anticipated to be two years. The total cost
is estimated to be R 85 million at 2009 prices.




                                             435
7.22            N    U N G W A N E       R   A W     W   A T E R   P   I P E L I N E

7 . 2 2 . 1     P   R O J E C T   D   E S C R I P T I O N


Planning No.:             302.5

Project No.:

Vote No.:



Water demands from the Amazimtoti WTP supply area have consistently increased
over the years with the AADD (12-month moving average) as at December 2009
equalling 43.5 Ml/day. Monthly average demand peaked at 46.4 Ml/day in December
2009. 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 (Section 7.21), which will be commissioned towards the end
of 2010.


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 7.24), 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 implementation of the South Coast Augmentation Booster Pump Station will
afford a window of opportunity to replace the existing Nungwane Raw Water Pipeline
before the Amanzimtoti. WTP is required to augment the supply.



7 . 2 2 . 2     I   N S T I T U T I O N A L   A     R R A N G E M E N T S

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




                                              436
Figure 7.24   General layout of the Nungwane Pipeline.




                                                         437
7 . 2 2 . 3    B   E N E F I C I A R I E S

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



7 . 2 2 . 4    I   M P L E M E N T A T I O N

The construction duration of this project is anticipated to be two years. The total cost
is estimated to be R 95 million at 2009 prices.




                                             438
7.23              S   O U T H       C   O A S T      P    I P E L I N E   P   H A S E     2    A

7 . 2 3 . 1       P   R O J E C T       D   E S C R I P T I O N


Planning No.:              305.14

Project No.:                UI105

Vote No.:



The South Coast Pipeline is to be extended southwards in two phases. The South
Coast Pipeline Phase 2a (SCP-2a), which is currently in the design phase, will run
between Park Rynie and Kelso (Figures 7.25) for a length of 4 km. This project will
provide some relief for the Umzinto and Mtwalume WTPs as this load will then be
picked up by the SCP-1 from Amanzimtoti. The South Coast Pipeline Phase 2b,
which will be implemented at a future stage, will complete the section between the
Scottburgh South Reservoir off-take and the Park Rynie off-take as well as extend
southwards from the end of SCP-2a.


Supply for the SCP-2a will be drawn from the South Coast Pipeline Phase 1 via Ugu
District Municipality’s Ellingham Reservoir and fed towards Pennington Reservoir. It
can then be transported further to Elysium Reservoir along the existing Ugu District
Municipality bulk water supply infrastructure. This will alleviate the demand on the
Umzinto and Mtwalume WTPs to the extent of 7 Ml/day and the available capacity of
Umzinto WTP can then be utilised for the hinterland region.


Key information on this project is summarised in Table 7.24.


       Table 7.24          Project       status,   components       and       capacity   for   the
                           South Coast Pipeline Phase 2a.

Project Status:             Design (March 2010).

Project Components:         Extension of the South Coast Pipeline Phase 1.

Capacity:                   35 Ml/day.




7 . 2 3 . 2       I   N S T I T U T I O N A L       A     R R A N G E M E N T S

The South Coast Pipeline Phase 2a will be owned, operated and maintained by
Umgeni Water.


                                                    439
Figure 7.25   General layout of the South Coast Pipeline Phase 2a.




                                                              440
7 . 2 3 . 3    B   E N E F I C I A R I E S

Assuming 75 l per person per day, approximately 66 667 people could be served.
This initial phase will primarily support many rural communities that currently do not
receive a sustainable supply of water or have no current water service.



7 . 2 3 . 4    I   M P L E M E N T A T I O N

The duration of this project is anticipated to be two years. The total cost is estimated
to be R 31 million at 2009 prices.




                                             441
7.24            M    H L A B A T S H A N E          B   U L K   W   A T E R   S   U P P L Y

                S   C H E M E

7 . 2 4 . 1     P   R O J E C T   D   E S C R I P T I O N


Planning No.:            305.10

Project No.:

Vote No.:



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
Sisonke 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 will initially comprise of a dam on the
Mhlabatshane River (a tributary of the Mzumbe River), from where water will be
pumped to a WTP situated in close proximity to the command reservoir. Potable
water will then be sold to Ugu District Municipality from the 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) and then fed into the reticulation system via the command reservoir.


Key information on this project is summarised in Table 7.25.




                                              442
       Table 7.25          Project information: Mhlabatshane BWSS.

Project Status:             Design (March 2010)

Project Components:         Dam, raw water pump stations and rising main, WTP, potable water
                            pump station and rising main, and reservoir.

Capacity:                   4 Ml/day (initially)



7 . 2 4 . 2       I   N S T I T U T I O N A L       A     R R A N G E M E N T S

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.



7 . 2 4 . 3       B   E N E F I C I A R I E S

The supply of water is at a basic level of service for domestic use only, and a 0%
population growth rate has been assumed as the area is regarded as being “deep
rural”.


       Table 7.26          Number of people per supply zone for Mhlabatshane
                           BWSS.

                           Supply Zone             2007             2037
                          Bhekani                  1197             1197
                          Nhlangwini               25401            25401
                          (west)
                          KwaCele 1                11723            11723
                          Hlubi                    4826             4826
                          Mabhaleni                10426            10426
                          (west)
                          KwaCele K                 9519            9519
                          Frankland                 4200            4200
                          Qwabe P                   6360            6360
                          Shabeni                   16605           16605
                          KwaMadlala                10705           10705
                          Total                    101062          101062


7 . 2 4 . 4       I   M P L E M E N T A T I O N

Construction of this scheme is expected to commence during the dry season of 2010
and is expected to take two years to complete.



                                                    443
Figure 7.26   General layout of the Mhlabatshane BWSS.




                                                         444

								
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