BULK SERVICES REPORT:

uMLALAZI-NKANDLA

PROVISION OF CIVIL ENGINEERING

BULK SERVICES

WATER AND SANITATION

REVISION 1

AUGUST 2011

PREPARED BY: PREPARED FOR:

Hadebe Khumalo Engineers. The Department of Rural in Assocoation with Kombani Consulting Development and Land Reform P O Box 11141 Private. Bag X 833 Erasmuskloof Pretoria 0048 0001

uMlalazi-Nkandla _________________________________________________________________________________

2

SERVICES REPORT: uMlalazi-Nkandla 1. INTRODUCTION

Hadebe Khumalo Engineers was appointed as consultants for the design approach and cost estimation of civil engineering bulk services for the planned multi purpose development as part of a feasibility study.

2. WATER SERVICES

2.1 General Design Criteria

The detail water reticulation analysis shall be done according to the design standards and specifications approved by uMlalazi Municipality. Where applicable Chapter 9 (Water Supply) of the “Guidelines for Human Settlement Planning and Design (2000) (Red Book)”, shall also be used as design criteria.

Design Standards for Water Supply: 2.2 Planned water supply

A local pump station near Mkhalazi will provide a proposed 2.4 megalitre reservoir with water. The proposed reservoir will supply the development with water by a 300mmØ uPVC bulk water pipe. the possible position for the reservoir being investigated is behind the Thusong Service Centre. This location would serve future development.

Estimated Water Demands

Land use rights Floor

Area m2

Design Criteria (kl/m

2)

Total (kl/day)

Total Demand (l/s)

Peak Factor

Peak Water Demand

(I/s)

Community Facilities 44460.000 0.006 266.760 3.088 3.300 10.189

Government facility 7020.000 0.005 35.100 0.406 3.300 1.341

Commercial 5868.000 0.006 35.208 0.408 3.300 1.345

Health and Safety 6084.000 0.010 60.840 0.704 3.300 2.324

Education 70596.000 0.005 352.980 4.085 3.300 13.482

Residential 68580.000 0.012 822.960 9.525 3.000 28.575

Recreation 9702.000 0.003 29.106 0.337 3.300 1.112

Streets -

TOTAL 58.366

Fire Flow 50.000

TOTAL DEMAND 108.366

Please note that the floor area has been increased by 80% for future development.

uMlalazi-Nkandla _________________________________________________________________________________

3

STATUS QUO

Expansion of current chlorination plant.

The current chlorination plant is being upgraded to accommodate future expansion. At the time of writing, the final numbers of the capacity upgrade was not available yet.

uMlalazi-Nkandla _________________________________________________________________________________

4

The current facility needs additional storage space.

Apart from the upgrading of the existing chlorination plant, a second plant is planned next to the existing one. Earthworks have started, and completion is expected in 2012.

uMlalazi-Nkandla _________________________________________________________________________________

5

Water is pumped from the Tugela river to the chlorination plant via the Mkhalazi High Lift Pump Station. According to the station manager capacity is sufficient for future development in as far as the Smart Growth Initiative is concerned.

This reservoir is situated above the police station and Thusong Service Centre. The reservoir is being fed from the Chlorination plant. Capacity of this vessel is 46 000 l and was serviceable during the site visit. The above setup is a very effective and efficient form of potable water provision.

uMlalazi-Nkandla _________________________________________________________________________________

6

3 Sanitation

STATUS QUO

At present there is no water borne reticulation or a waste water treatment works. Ventilated pit latrines and soak aways are in use.

3.1 Sewer Standards

The detail sewer reticulation analysis shall be done according to the design standards and specifications approved by uMlalazi Municipality. Where applicable Chapter 10 (Sanitation) of the “Guidelines for Human Settlement Planning and Design (2000) (Red Book)”, issued by the Department of National Housing will be the design standards for the project. The applicable SABS 1200 Standard Specifications will be used as part of the Project Specification for the contract documentation.

SEWER DESIGN CRITERIA

3.2 Planned sanitation services

The development will be provided with a package treatment plant using SBR (sequencing batch reactor) Technology from Prentec. A 250mmØ sewer pipeline will transport the sewerage from the development. The location for the sewer treatment package plant and the pump station is shown on drawing 1133/300/01. Table 4: Estimated Sewage Outflows

Land use rights Floor

Area m2

Design Criteria (kl/m

2)

Total (kl/day)

Total Demand (l/s)

Peak Factor

Peak Water Demand

(I/s)

Community Facilities 44460.000 0.006 266.760 3.088 2.500 7.719

Government facility 7020.000 0.005 35.100 0.406 2.500 1.016

Commercial 5868.000 0.006 35.208 0.408 2.500 1.019

Health and Safety 6084.000 0.010 60.840 0.704 2.500 1.760

Education 70596.000 0.005 352.980 4.085 2.500 10.214

Residential 68580.000 0.012 822.960 9.525 2.500 23.813

Recreation 9702.000 0.003 29.106 0.337 2.500 0.842

Streets -

TOTAL 46.382

Infiltration (15%) 6.957

TOTAL DEMAND 53.339

Please note that the floor area has been increased by 80% for future development.

uMlalazi-Nkandla _________________________________________________________________________________

7

Proposed Sewerage Package Plant

A Waste Water Treatment Works (WWTW) similar to the above is proposed for the development. This system can be commissioned as a modular package, with expansion as demand increases.

uMlalazi-Nkandla _________________________________________________________________________________

8

4. ESTIMATED CONSTRUCTION COSTS

5. DSIGN STANDARDS All designs and construction will be in accordance with uMlalazi Municipality Standard Details, The Redbook ("Guidelines for the Provision of Engineering Services and Amenities in Township Development"), General Conditions of Contract for Works of Civil Engineering Construction (Sixth Edition (1990) and STANDARD SPECIFICATION FOR MUNICIPAL CIVILWORKS (1991).

G Combrinck Pr Eng (970122) 11 October 2011 ..................................................................... .......................................... HADEBE KHUMALO Engineers DATE

CONSTRUCTION COSTS

Item Description Quantity Units Rate Amount

1 Water 5000 m R 850.00 R 4 250 000.00

2 2,4 ML reservoir 1 No R 5 100 000.00 R 5 100 000.00

3 Sewers 3376 m R 810.00 R 2 734 560.00

4 Pump station 1 No R 2 368 421.05 R 2 368 421.05

5 Sewer Treatment Plant 1 No R 2 550 000.00 R 2 550 000.00

Sub Total R 17 002 981.05

6 Preliminary and General 15% R 2 550 447.16

Sub Total R 19 553 428.21

7 Contingencies 10% R 1 955 342.82

Sub Total R 21 508 771.03

8 Surveying R 0.00 R 0.00

9 Professional Fees R 2 183 595.48

TOTAL (VAT Excluded) R 23 692 366.51

VAT (14%) R 3 316 931.31

TOTAL (VAT Included) R 27 009 297.82