Application for a Water Use Authorisation for the construction of a pipeline between the Baviaanspoort
Correctional Services Pump Station and the Baviaanspoort Municipal Waste Water Treatment Works
Report Prepared for
Department of Public Works
public works
Department: Public Works REPUBLIC OF SOUTH AFRICA
Report Number 498454/Baviaanspoort Pipeline WUA
Report Prepared by
srk consulting August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page i
Application for a Water Use Authorisation for the construction of a Pipeline between the Baviaanspoort Correctional Services Pump Station and the Baviaanspoort Municipal Waste Water Treatment Works
Department of Public Works
SRK Consulting (South Africa) (Pty) Ltd. Block A, Menlyn Woods Office Park 291 Sprite Avenue Faerie Glen Pretoria 0081 South Africa
e-mail: [email protected] website: www.srk.co.za
Tel: +27 (0) 12 361 9821 Fax:+27 (0) 12 361 9912
SRK Project Number 498454/ Baviaanspoort Pipeline WUA
August 2018
0BCompiled by: 1BPeer Reviewed by:
3BNdomupei Masawi 5BManda Hinsch
4BSenior Scientist 6BPrincipal Scientist/Partner
7BEmail: [email protected]
2B Authors:
8BM Hinsch; N Masawi
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Table of Contents Disclaimer ...... vii List of Abbreviations ...... viii 1 Introduction and Scope of Report ...... 1 1.1 Background and Brief...... 1 1.2 Applicant Details ...... 1 1.2.1 Water Uses in terms of National Water Act...... 8 1.3 Purpose of the application and study ...... 8 2 Location of the Project ...... 9 2.1 General Project Area Location...... 9 2.2 Ownership of Affected Impacted Properties ...... 9 2.3 Ownership of Adjacent Properties ...... 9 2.4 Land Use Zoning ...... 9 3 Description of the Surrounding Environment ...... 13 3.1 Regional Climate ...... 13 3.2 Temperatures ...... 13 3.3 Rainfall ...... 13 3.4 Wind ...... 14 3.5 Evaporation ...... 14 3.6 Soils ...... 15 3.7 Geohydrology ...... 15 3.7.1 Geology and structural geology ...... 15 3.7.2 Detailed Geology ...... 15 3.7.3 Transported Soil ...... 16 3.7.4 Bedrock ...... 16 3.8 Areas of Conservation Importance ...... 16 3.9 Geotechnical Status ...... 16 3.10 Water Resources ...... 18 3.10.1 Surface Water Resources ...... 18 3.10.2 Mean Annual Runoff (MAR) ...... 20 3.11 Floodlines and Hydrology ...... 20 3.11.1 Results Findings of the Floodline Study ...... 20 3.12 Surface Water Quality ...... 21 3.12.1 Ecological Status of the Upper Pienaars River ...... 25 3.12.2 Drivers of Change (Department of Environmental Affairs and Tourism, 2005) ...... 25 4 Description of the project ...... 27 5 Construction ...... 29 5.1 Access ...... 29
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5.2 Water for construction purposes ...... 29 5.3 Power ...... 29 5.4 Sanitation ...... 29 5.5 Contractors Camp and Laydown Area ...... 29 5.6 Materials Handling ...... 29 5.6.1 Stockpiles of Raw Materials ...... 29 5.6.2 Fuel Display ...... 29 5.6.3 Construction Materials ...... 29 5.7 Employment and Occupational Health and Safety ...... 30 5.8 Construction Methodology for the Pipeline ...... 30 5.9 Maintenance ...... 30 6 Risk Assessment and Mitigation...... 31 6.1 Approach and Methodology ...... 31 6.2 Risk Assessment Results ...... 33 7 Management Plan ...... 37 7.1 Development footprint ...... 37 7.2 Vehicle access ...... 37 7.3 Vegetation ...... 37 7.4 Soils and sediment ...... 38 8 Rehabilitation ...... 39 8.1 Objectives of Maintenance and Rehabilitation Activities/Terms of Reference ...... 39 8.2 Surface Water Rehabilitation and Management Plan ...... 39 8.3 Management measures pertaining to the rehabilitation phase of the proposed activities ...... 41 8.4 Management measures pertaining to the operational phase of the proposed activities ...... 49 9 Monitoring Plan ...... 51 9.1 Monitoring Philosophy and Requirements ...... 51 10 Public Participation Process ...... 55 11 Section 27 Motivation ...... 59 12 Conclusion ...... 62 13 References ...... 63 Appendices ...... 64 Appendix A: Project Master Plan ...... 65 Appendix B: Power of Attorney, Letter of Confirmation and ID ...... 66 Appendix C: Title Deeds and Membership Change ...... 67 Appendix D: WU Licence and Registration Forms ...... 68 Appendix E: Certification for essential services provided ...... 69 Appendix F: Zwavelpoort Subdivision Layout ...... 70 Appendix G: Design Drawings Low Water Bridge ...... 71 Appendix H: Design Drawings Conservancy Tanks ...... 72
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Appendix I: As Built Drawing - Sewer lines ...... 73 Appendix J: As Built Drawing – Potable Water ...... 74 Appendix K: As Built Drawing – Roads ...... 75 Appendix L: Floodlines ...... 76 Appendix M: Stormwater Design ...... 77 Appendix N: Rehabilitation Plan ...... 78 Appendix O: Public Participation ...... 79 Appendix P: Method Statement ...... 80
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List of Tables Table 1-1: Contact details of the Applicant ...... 1 Table 1-2: Water Uses triggered by the project ...... 8 Table 2-2: List of Affected Properties and Property Owners ...... 9 Table 3-1::Temperatures for the Roodeplaat – AGR station ...... 13 Table 3-2: Average rainfall for Roodeplaat – AGR station ...... 13 Table 3-3: Wind direction and wind speed data for Roodeplaat – AGR station ...... 14 Table 3-4: A-Pan Evaporation data for Roodeplaat – AGR station ...... 14 Table 3-5: Natural MAR and Ecological Reserve (million m3/annum) (DWAF, 2004) ...... 20 Table 3-6: Summary of flood peaks (Future Development Conditions) ...... 20 Table 3-7: Summary of concentrations of selected compounds ...... 21 Table 4-1: Proposed New Pipeline and Pump Parameters...... 27 Table 6-1: Severity (How severe does the aspects impact on the resource quality (flow regime, water quality, geomorphology, biota, and habitat)...... 31 Table 6-2: Spatial Scale (How big is the area that the aspect is impacting on)...... 31 Table 6-3: Duration (How long does the aspect impact on the resource quality)...... 31 Table 6-4: Frequency of the activity (How often do you do the specific activity)...... 31 Table 6-5: The frequency of the incident or impact (How often does the activity impact on the resource quality). 31 Table 6-6: Legal issues (How is the activity governed by legislation) ...... 32 Table 6-7: Detection (How quickly or easily can the impacts/risks of the activity be observed on the resource quality, people and resource) ...... 32 Table 6-8: Rating Classes ...... 32 Table 6-9: Calculation ...... 32 Table 6-10: Risk Assessment ...... 34 Table 8-1: Prioritisation of rehabilitation/management actions applicable to the project area ...... 40 Table 8-2: Control and mitigation measures for the rehabilitation phase of the proposed activities: adopted from (Preez, 2018) ...... 41 Table 8-3: Control and mitigation measures for the duration of the operational phase of the proposed activities 49 Table 9-1: Monitoring actions for the proposed development ...... 53
List of Figures Figure 1-1: Location of the Development ...... 3 Figure 1-2: Layout plan for the development ...... 4 Figure 1-3: Layout plan for the development (Part 1) ...... 5 Figure 1-4: Layout plan for the development (Part 2) ...... 6 Figure 1-5: Layout plan for the development (Part 3) ...... 7
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Figure 2-1: City of Tshwane Municipal Boundary ...... 10 Figure 2-2: Affected and Adjacent Properties ...... 11 Figure 2-3: Landuse Zoning ...... 12 Figure 3-1: Location of Ecological Support Area shown on site ...... 17 Figure 3-2: Border of the Limpopo Water Management Area in relation to the development ...... 19 Figure 3-3: Water Resources ...... 22 Figure 3-4: Floodlines ...... 23 Figure 3-5: Water Quality Results for samples taken by the Department of Water and Sanitation between 1995 and 2016 on the Pienaars River at Baviaanspoort ...... 24 Figure 4-1: Baviaanspoort Rising Main System Curve ...... 28 Figure 10-1: On-site Notices ...... 56 Figure 10-2: Location of on-site notices ...... 57 Figure 10-3: Newspaper Advertisement ...... 58 -
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Disclaimer The opinions expressed in this Report have been based on the information supplied to SRK Consulting (South Africa) (Pty) Ltd (SRK) by the Department of Public Works (DPW). The opinions in this Report are provided in response to a specific request from DPW to do so. SRK has exercised all due care in reviewing the supplied information. Whilst SRK has compared key supplied data with expected values, the accuracy of the results and conclusions from the review are entirely reliant on the accuracy and completeness of the supplied data. SRK does not accept responsibility for any errors or omissions in the supplied information and does not accept any consequential liability arising from commercial decisions or actions resulting from them. Opinions presented in this report apply to the site conditions and features as they existed at the time of SRK’s investigations, and those reasonably foreseeable. These opinions do not necessarily apply to conditions and features that may arise after the date of this Report, about which SRK had no prior knowledge nor had the opportunity to evaluate.
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List of Abbreviations 1. AC Asbestos Cement 2. B-BBEE Broad-Based Black Economic Empowerment 3. CAT Centre for Advanced Training 4. CBAs Critical Biodiversity Areas 5. CMS Catchment Management Strategy 6. CoT City of Tshwane 7. CSF Correctional Services Facility 8. DO Dissolved Oxygen 9. DPW Department of Public Works 10. DWS Department of Water and Sanitation 11. ECO Environmental Control Officer 12. EI&S Ecological Importance and Sensitivity 13. ELU Existing Lawful Use
14. ESAs Ecological Support Areas 15. EWR Ecological Water Requirements 16. GA General Authorisation
17. GDARD Gauteng Department of Agriculture and Rural Development 18. GDS Green Drop System
19. GN Government Notice 20. GPS Global Positioning System 21. HDPE High Density Polyethylene
22. HECRAS Hydrologic Engineering Center's River Analysis System 23. ISP Internal Strategic Perspective
24. MAR Mean Annual Runoff 25. MTSF Medium-Term Strategic Framework 26. NDP-2030 National Development Plan 27. NFEPA National Freshwater Ecosystem Priority Areas 28. NWA National Water Act, 1998 (Act No 36 of 1998) 29. PPE Personal Protective Equipment 30. SABS South African Bureau of Standards 31. SACNASP South African Council for Natural Scientific Professions 32. SAS Scientific Aquatic Services 33. SCS Soil Conservation Service
34. SG Surveyor General
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35. SIPs Strategic Integrated Projects 36. SWMM Storm Water Management Model 37. uPVC Unplasticized Polyvinyl Chloride 38. WMA Water Management Area 39. WPS Waste Pump Station 40. WUAs Water Use Authorisations 41. WWTW Wastewater Treatment Works
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1 Introduction and Scope of Report 1.1 Background and Brief The Department of Public Works (DPW) owns and operates several Water Care Works with associated pump stations and reservoirs in the Gauteng and Mpumalanga Provinces. Over the past few years some of the Water Care Works owned by the DPW have scored poorly on the Department of Water and Sanitation (DWS) Green Drop System (GDS), which has compelled the DPW to prioritise these identified works for upgrading and to ensure that they have adequate capacity to service present and future requirements.
SRK Consulting (South Africa) (Pty) Ltd (SRK) was appointed by the DPW to undertake the status quo assessment and apply for any required Water Use Authorisations (WUAs) for the following Water Care Works:
• Centre for Advanced Training (CAT) Wastewater Treatment Works (WWTW); • Baviaanspoort Prison Piggery Pre-Treatment Plant and Sewage Pump Station (Baviaanspoort Correctional Services Facility (CSF); • Boekenhoutkloof WWTW (Old and New); • Ditholo WWTW; • Thaba Tshwane WWTW; • Toitskraal Water Treatment Works; • Toitskraal WWTW; • Wallmansthal pump station; and 1 • Roodeplaat WWTW 0F ; The Baviaanspoort CSF is situated in Pretoria on the northern side of the Mamelodi community and the R513 in Baviaanspoort. The Baviaanspoort CSF domestic and piggery wastewater is pumped to the Tshwane Municipal Baviaanspoort Wastewater Treatment Works (WWTW) via a main Waste Pump Station (WPS). The main WPS and the piggery pre-treatment facilities are located at the north- western perimeter fence of the prison complex, next to the Pienaars River, on the eastern bank of Pienaars River. A number of Baviaanspoort CSF infrastructure needing upgrading or refurbishment have been identified. These include the replacement of the existing pipeline that carries wastewater between the Baviaanspoort CSF main WPS and the Baviaanspoort Municipal WWTW.
The pipeline will cross the Pienaars River and will therefore require a Section 21 (c) and (i) water use authorisation. The total length of the pipeline is approximately 2.9 km, with 1.19 km of the pipeline located within the 1:100 year floodlines.
The location of the proposed pipeline can be seen in Figure 1-1. Figure 1-2 to Figure 1-5 provide the pipeline layout plan.
1.2 Applicant Details Table 1-1: Contact details of the Applicant
Name of Applicant: Department of Public Works (DPW)
Responsible Person: Mpafane Deyi
1 The inclusion of the Roodeplaat Waste Water Treatment Plant for a water use authorization is still under debate since this works is already authorized. Inclusion into the WULA process under this contract will only be done if an amendment to the Water Use Authorisation is required.
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Designation of Responsible person:I Physical Address:1 Postal Address:I
Contact Number (work):I Contact Number (cell):I 082 882 6436I Fax Number:I Contact Email:I [email protected]
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N A
Legend
.A. Points
LJ Affected farm Portions L. GP Parent Farms
GP Farm Portions
4 .5
• 3
■ 2
■ 0-1
X
Di~..S.-!11 c::J Province CJ District Municipalities
Local Municipalities
Data Soofce·
Seale. 1:37 151 ProiecbOn: Datum: GEO WGS84 C•ntral Merid,anl Zone.
Dato: Compiled by: BAVIAANSPOORT PIPELINE WUA 15108120 18 OEBW -;= srk consulting Proje Figure 1-1: Location of the Development MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 4 Cw,,lgN .., ...... ~"'""""'- public works f'uOlcW<>ru. --REl'\!llUCQ/fSOVT><'-ffio:;A -PGRAJ \C OF TEN ( 1 o; W/\STF 't/i\TFR TRF,\TMFNT WO~KS ;wvnw) SURRJll\OIN ✓ :::;,R[TO~IA AR[il.S· ::3AVl,V,NS )OO~T 054496 ARRANG EMENT on1g,.. 8AUT C5804-BAV-009 Figure 1-2: Layout plan for the development MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 5 NEW PIPELINE - LAYOUT (SHEET 1 OF 3) SCALE 1:1000 -od-~---~- "'5-BUI.TOAA'Mt!GREOVIREI.IEHTS ~ ~ ~ ~ ~ 1250.000,------+------+------r------, I C5804-BAV-010 ---A 0 10 : I ~ 1245.000 public works ! ~- ~ ~ - !~ : N.G.L \ ------I 5 RCPU81. IC OFSOVTHNRICA 1 0 000 ~ i ~~------~ -- ~ __,______. : ; \_ i i i i i I DIR ECTOR-GENERAL MR.MZIWONKE DI.ABANTU " · ==~r~"·G=.L=. j j , "" BOTTO• J : i 1235.000 ======-~====~=.--.:===~======--======______,-=11: ! ' _~'\::-::PIPE BOTTOM:----- 7i- ' ' ' ' I 1 ~ \_ PIPE BOTTOM i ! i ! j _j i OATUM 12JO.OOO =¢F srk consulting DISTANCE (m) ~ c:,_J C/L GROUND LEVEL a~ L ~ ~ &. • I L L a ~ _. a'= I a &. &. &. a .,... CIVI L ENGIN EERING C/L PIPE BOTTOM J::>GRAC11\C CF TEI\ (, C) W/\ST[ 1/'//IF.? T?E/\TMEI\ T VVJRKS SvR~CU\J)I\JG CUT / FILL TO ~-ww rw) PIPE BOTTOM :;;1g~1 ~1 ::,RETORIA AREAS· I I I I lAVIMNSPOO•~T PIPE HORIZONTAL STRAIGHT STRAIGHT STRAIGHT STRAIGHT i ALIGNMENT 345'8'40.925. 253'53'17.096. 242'55'27.276" 264'30'28.828~ PIP[ VERTICAL I - 2.389% - 1.095% 0. 455 ~ 0.2 18% 1.518% 0.89~ 1.154% 5.659 % - 8.31 1% - 2.170% +-- - 0.262'1: 1.440 % PROFIL£ + --+ + -I 250NO CLASS PN12.5 PE100 HOP E PIPE 9m LE NGTH BUTT-WELDED PIP[ SIZE 054496 P'1PEL.1NE NEW PIPELINE - LON GITUDINAL SECTION (SHEET 1 OF 3) LAYOUT & LONG SECTI ON HORIZONTAL SCALE 1:1000 SHEET 1 OF 3 _____ VERTICAL SCALE 1:200 --~* -= ..4g5454 - ,..-.. - ,-- -·-~ ~~"'BAUT--- - 09/ 0:.(2018 ,_ LA8R ' :r C5804-BAV-010 Figure 1-3: Layout plan for the development (Part 1) MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 6 _of..__Copy,1gl,O_,, ... NEW PIPELINE - LAYOUT (SHEET 2 OF 3) SCAJ..[ 1:1000 ---.. ..-,g, .. po,C.O•-o,-.ii -iO.UOII.T OAAWINC.MCIOIREM£NTS 1270.0001 N.G~ -----=------J :~= I ------_...,.__ 1265 000: : ------;:::======:::::::: - 1 ------IC5804 - 8AV - 01 1 AO i ! ~~ 1260.0001 ------r : ~ : 0 public works I N.G.l. ~ i 1 REPV!ll.lCOl'SOJIH AFHIC~ 12ss.000 - ' 1 -· ------: DIRECTOR-GENERAi. : ------i MR.MZIWONKEDLASANTU 12 I ROAD ----- : SD.OOOI CROSSING ~ : : ~~ :i 124 5.0001 N.G.L i I / ' ,---'---~ RIVER CROSSING PI PE TO BE HORIZONTALLY i i"---,. \.___ r;--____--,-- DRI LLED BELOW ROAD : - ~-----) : ~ \ : I PIPE BOTTOM : ~~ i : i i : - PIPE TO BE HORIZONTALLY ~, ,- , _j DATU M 1235.000 I I I DRI LLED BELOW RIVER I C/L PIPE BOTTOM ~I CUT / FILL TO ~ ~ ~~ PIPE BOTTOM "'I 054496 11 I I 'I PIP[ HORIZONTAL STRAIGHT STRAIG HT PiPEl.1NE AU GNIJ [ NT 350"43'20.680" 276"59'6.916" LAYO UT & LONG SECTI ON SHEET 2 OF 3 PIPE VE RTICAL - 0.086,: 5.771,: 1.1 23,; 2.578,: ,J.795,; 4. 213,: 3.039 ,: PROFILE ..,...,. 498454 dooq>od 8AUT 250NO CLASS PN 12.5 P[ lOO HOPE PIP[ 9m LENGTH BUTT-WELDED - AS SHOWN _•--n,~--- PIPE SIZE ..,. 09/ 05/2018 "'°""" V.SR NEW PIPELINE - LONGITUDINAL SECTION CONTINUED (SHEET 2 OF 3) HORIZON TAL SCALI 1:1000 & VERTICAL SCALE 1:200 C5804-BAV-011 Figure 1-4: Layout plan for the development (Part 2) MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 7 NEW PIPELINE - LAYOUT (SHEET 3 OF 3) SCAL[ 1:1000 OISCHARGEAT MUNICIPAL wwrw 1290.000 ~ I I EXISTING SPOIL SITE I PIPETO BEHORIZONTALLYORILLED 1285.0001 _ AO :: --~ ~ I r-1"" _\ i i 1280.000: ~ ------===-~------~~ -~-- ~ i i public works '" ~j "" -- _J_:::::_-v---_____ ---REPVllUC-OF SOUTH AFRICA. OIRECTOR·GENERAL 1__ MR.MZIWONKEO\.Af!ANTIJ 1270.000 I I PIPE BOTTOM / EX ISTING CHAMBER I I. L. 1269.950 1265.000: I I DATUM 1260.000 I § § § § § L=> c...... J ~ DISTANCE (m) ~ i I ~ i ~ ~ CIVIL ENGINEERING ill - ~ JPGRAOING C/L GROUND LEVEL~: OF TEN ('C) gl 'NASTE WATER T~EATMENT """"~-Ii- ~""I !""""-I~-I ~I ~I !I ~I ;1 - - V'l'ORKS (IVWTW) SURRC~NDl~G " 1 gi :; ill ii! ~ C/L PIPE BOTTOM ::JRETOf-.?1/1 I\RE/\S: i: 1 ~ ~ ~ ~ ~ ~ ~ ..J,AVI/\/\NSl OORl CUT / FILL TO ~ :i PIPE BOTTOM ~ - ~ 'i ~ ~ PIPE HORIZONTAL STRAIGHT STRAIGHT ' STRAIGHT ALIGNMENT 276'59'6.9 16" 288'59'27.062" 218'42'9.468" 199'34'33.580" 054496 PIPE VERTICAL 3.039 ,; 4.141 % -9.601 % - 1.769% - 6.417,; - 0.02 1Z PROFlLE PIPELI NE 250NO CLASS PN12.5 PE100 HOPE PIPE 9m LENGTH BUTT-WELDED ·-- PIPE SIZ E LAYOUT & LONG SECTION SHEET 3 OF 3 * -""- ,4984~ ,_ NEW PIPELINE - LONG ITUDINAL SECTI ON CONTIN UED (SHEET 3 OF 3) KOio AS SHOWN HORIZONTAL SCALE 1:1000 -- - 09l'.O!il'.2018 - "'w, VERTICALSCAI.El:200 - j C5804-BAV-012 ---- Figure 1-5: Layout plan for the development (Part 3) MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 8 1.2.1 Water Uses in terms of National Water Act The construction of the pipeline will trigger water uses as classified in Section 21 of the National Water Act, 1998 (Act No 36 of 1998) (NWA). The water uses triggered by the project are provided in Table 1-2. The master plan showing all the water uses is attached as Appendix A. Table 1-2: Water Uses triggered by the project Water Use Description Duration Coordinates 1 Construction of a pipeline within Permanent – duration Start 28.36355 100 m of the Pienaars River. of the project -25.669811 End 28.363832 Section 21 (c). impeding or -25.690501 diverting the flow 2 Construction of water diversion Temporary-during Start 28.363534 of water in a structures within 100 m of the construct phase watercourse; Pienaars River -25.669793 End 28.361264 -25.679380 3 Construction of a pipeline within Permanent – duration Start 28.36355 100 m of the Pienaars River. of the project -25.669811 End 28.363832 Section 21 (i) altering the bed, -25.690501 banks, course or 4 characteristics of Construction of water diversion Temporary-during Start 28.363534 a watercourse structures within 100 m of the construct phase -25.669793 Pienaars River End 28.361264 -25.679380 1.3 Purpose of the application and study Due to the small scale and low impact at the identified priority points, the Department of Public Works would like to apply for a General Authorisation (GA) process in terms of Chapter 4 of the NWA. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 9 2 Location of the Project 2.1 General Project Area Location. The pipeline is located in the Gauteng Province, under the jurisdiction of the City of Tshwane Metropolitan Municipality (Figure 2-1). The pipeline will run from the Baviaanspoort WPS, which is located on the western bank of the Pienaars River and will cross the Pienaars River and run on the eastern bank of Pienaars River to the Baviaanspoort WWTW. The project is located approximately 1 km north of Mamelodi Township and about 4.89 km south of Roodeplaat Dam. The major land uses surrounding the project area vary from agriculture, Baviaanspoort Prison north of Zambezi Drive (R513) and scattered human inhabitation. 2.2 Ownership of Affected Impacted Properties The affected properties and details of the property owners are summarised in Table 2-2. Figure 2-2 shows the properties affected by and adjacent to the pipeline. Table 2-1: List of Affected Properties and Property Owners Portion Farm Name Title Deed 21-SG Code Property Owner Number Government National Government of the Republic of South Africa Baviaanspoort 1 T9753/1984 T0JR00000000033000001 330 JR Colin Cloete: Manager: Gauteng: Provincial State Land Government National Government of the Republic of South Africa Baviaanspoort 2 T1451/1888 T0JR00000000033000002 330 JR Colin Cloete: Manager: Gauteng: Provincial State Land 2.3 Ownership of Adjacent Properties The adjacent properties and details of the property owners are provided in Appendix B. 2.4 Land Use Zoning The affected land is zoned for agricultural purposes and the adjacent land is zoned as “undetermined and agricultural". Figure 2-3 as provides the land use zoning for the affected and adjacent properties. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 10 N A SOshanguve BoJanala Oamonsvllle @momm Akasla Crty of Tshwane .. , c:::J ProYn:e □ Olslrt:IMUl'IIC1pallt~ MUNICNAIIE - Bela~Bela Bronkhorstspruit - Clt'fofJonannesburg - Clt'/ofTsnwane - OrJSMotob - EkUl'h!Mnl - LocalMUOICipa~tyolMadibeng - MogaleCity .- ,...,Moretde ..... -,-srk consulurg BAVIAANSPOORT PIPELINE WUA MUNICIPAL AREAS Figure 2 - 1 : City of Tshwane Municipal Boundary M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 11 N A Legend ..&. Points GP F erm Portions • ■ 0 - 1 local MunicipaliliH 0 111 Source Scai.t: 1:37 151 ::aection: j ~~ C-1tr1 erid,an/Zone. 0;111 C¢mpil~ by BAVIAANSPOORT PIPELINE WUA 15/0812018 OEBW ..,-srk consu~ Project No: Fig No: AFFECTED AND ADJACENT 498454 R.... iti on: A oalt:1&08/20H! Figure 2 - 2 : Affected and Adjacent Properties M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 12 N A Legend .A. Points Aff■ c t■d_Adjac■ nt ;::::-•---.-1-- AFF_ADJ D Act1ac:eritErveri c:J Adjacent Farm Portloos D Affecled Farm Por110ns ,-- GPPll'"efll Farms ..,..srk consulting BAVIAANSPOORT PIPELINE WUA ZONING Figure 2 - 3 : Landuse Zoning M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 13 3 Description of the Surrounding Environment 3.1 Regional Climate The pipeline falls within the Limpopo Water Management Area (WMA), within the Crocodile River catchment area. The climatic conditions across this catchment are temperate and semi-arid in the east to dry in the west. Rainfall is strongly seasonal, with most rainfall occurring as thunderstorms during the summer period of October to April. Mean annual rainfall ranges from 400 to 800 mm and decreases from the eastern to the western side of the WMA. The mean annual temperature ranges between 18 and 20 °C. Maximum and minimum temperatures are experienced during January and July respectively (River Health Programme, 2005). 3.2 Temperatures Average, maximum, and minimum temperatures for the Roodeplaat – AGR station is presented in Table 3-1. The data period extends over 51 years, starting on 1 June 1957 and ending on 31 July 2003 (Institute for Soil, Climate and Water). Table 3-1::Temperatures for the Roodeplaat – AGR station Temperature (°C) Month Average Maximum Minimum January 23.1 29.6 16.8 February 22.8 29.1 16.5 March 21.4 28.1 14.6 April 18.1 25.6 10.7 May 14.5 23.1 5.8 June 11.4 20.5 2.3 July 11.4 20.8 2.0 August 14.0 23.5 4.4 September 17.9 26.9 8.9 October 20.5 28.2 12.8 November 21.4 28.2 14.7 December 22.4 28.8 16.0 3.3 Rainfall Average rainfall data for the Roodeplaat – AGR station is presented in Table 3-2. The data period extends over 50 years, starting on 1 June 1952 and ending on 31 July 2003 (Institute for Soil, Climate and Water). Table 3-2: Average rainfall for Roodeplaat – AGR station Month Average rainfall (mm/day) January 117.1 February 85.4 March 71.9 April 44.9 May 16.9 MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 14 Month Average rainfall (mm/day) June 6.7 July 3.0 August 5.4 September 17.8 October 66.8 November 102.3 December 102.8 3.4 Wind Wind direction and wind speed data for the Roodeplaat – AGR station is presented in Table 3-3. The data period extends over 8 year, starting on 13 July 1999 and ending on 31 May 2007 (Institute for Soil, Climate and Water). Table 3-3: Wind direction and wind speed data for Roodeplaat – AGR station Wind direction Wind calm Wind speed intervals (meter/second) Total percentage 1 - 3 4 - 7 8 - 12 13 - 20 > 20 Calm 52.57% 0 0 0 0 0 52.57 N 0 8.65 0.16 0 0 0 8.82 NE 0 5.66 0.11 0 0 0 5.77 E 0 6.67 0.15 0 0 0 6.83 SE 0 5.8 0.23 0 0 0 6.04 S 0 2.51 0.12 0 0 0 2.63 SW 0 2.85 0.13 0 0 0 2.97 W 0 6.65 0.22 0 0 0 6.86 NW 0 7.37 0.14 0 0 0 7.51 3.5 Evaporation A-Pan evaporation data for the Roodeplaat – AGR station is presented in Table 3-4. The data period extends over 46 years, starting on 1 June 1957 and ending on 31 July 2003 (Institute for Soil, Climate and Water). Table 3-4: A-Pan Evaporation data for Roodeplaat – AGR station Month A-Pan Evaporation (mm) January 238.1 February 202.1 March 193.3 April 150.7 May 129.9 June 110.5 July 141.5 August 170.1 September 219.8 October 246.4 MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 15 Month A-Pan Evaporation (mm) November 232.8 December 244.3 3.6 Soils Soils in the Pienaars River sub-catchment can be divided into three main groups: • Moderate to deep sandy loam soils on flat and undulating terrain overlying dolomite, limestone and sandstones in the upper reaches of the catchment; • Moderate to deep clay loam soils over much of the middle portions of the sub-catchment (located away from the river channels), overlying the more porous unconsolidated sedimentary material; and • Moderately shallow to moderately deep, clayey loam to clay-rich, fine-grained soils over most of the lower reaches of the sub-catchment.(Water Institute of Southern Africa, 2017). 3.7 Geohydrology A geohydrological study conducted at Baviaanspoort WWTW found that a shallow aquifer is intersected in monitoring boreholes at the WWTW in sandy soils at varying depths. The water table depths vary between 6 m to 24 m below the surface level. Groundwater flow appears to be in a general northerly and westerly direction towards the Pienaars River. The water tables are shallowest near the river. 3.7.1 Geology and structural geology Africon Engineering (2003) conducted a geophysical ground surveys to locate targeted areas on the geological, aerial photo interpretation, and aeromagnetic surveys maps. The study was used to delineate geological features such as weathered zones, dykes, faults, rock features and lithological contacts. The study found that Baviaanspoort WWTW is located on rocks belonging to the Magaliesberg and Smelterskop Formations of the Pretoria Group, Transvaal Supergroup. Shales in the Magaliesberg Formation have been altered to hornfels by the intrusion of diabase. The Smelterskop Quartzite consists of quartz partially felspathic, subgraywacke partially with shale, hornfels, lava and dolomitic limestone. Outcrops of bedrock are not common and the geological rock formations are largely underlying a sedimentary cover of recent age consisting of silica sand from weathering of Magaliesberg Quartzite as well as talus and weathered material originating from other rocks. The Pienaars River is winding through the Magaliesberg Mountains along north south trending geological structural features. The geological contact zones are mainly east west orientated and include contacts between quartzite, diabase and shale layers within the Pretoria Group. Fault structures on the 1:50 000 geological map are mainly northerly orientated but a large fault located to the east on the WWTW has a NW to SE strike direction. 3.7.2 Detailed Geology The existing geological map for the general area (sheet no. 2528 CB Silverton) shows the site to be underlain by diabase bedrock, with the quartzite ridge immediately to the southern boundary. The 25⁰ to 30⁰ northerly dip of the quartzite indicates that it extends into the WWTW beneath the diabase. Both rock types are mantled by a soil being expected to overlie a varying thickness of residual clayey to sandy soil, respectively derived from diabase and quartzite. A prominent NW-SE trending fault is MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 16 present in the quartzite ridge (Magaliesberg Ridge) close to the southern boundary of the site and possibly extends some distance beneath a cover of transported soil. 3.7.3 Transported Soil The transported soil generally comprises a sandy hillwash layer, which is replaced near Pienaars River by clayey sand alluvium that seemingly contains boulders and/or course diabase gravel. 3.7.4 Bedrock The bedrock encountered in the Baviaanspoort area consists of dark grey diabase, greenish grey shale and pale grey to pale greenish grey quartzite predominate. 3.8 Areas of Conservation Importance The Gauteng Department of Agriculture and Rural Development (GDARD) has developed a database which shows which areas in Gauteng is critical for protecting the natural physical environment. The Gauteng Conservation Plan (Gauteng Department of Agriculture and Rural Development, 2014) , identifies sites that are critical for maintaining biodiversity These datasets were overlain to the proposed development site showing that approximately a third of the site is classed as Ecological Support area with another15% being classed as irreplaceable ecological area. The areas can be seen in Figure 3-1. Critical Biodiversity Areas (CBAs) are areas required to meet biodiversity targets for ecosystems, species and ecological processes, as identified in a systematic biodiversity plan. Ecological Support Areas (ESAs) are not essential for meeting biodiversity targets but play an important role in supporting the ecological functioning of Critical Biodiversity Areas and/or in delivering ecosystem services. 3.9 Geotechnical Status A geotechnical investigation was undertaken to assess the soil and rock conditions underlying the Baviaanspoort CSF. The intention of the investigation was to determine the excavatibility of the underlying material, determine the depth to refusal and test the engineering properties of the underlying material. The geotechnical investigation comprised the digging of numerous test pits on the site, logging them, interpret the results and make recommendations with regards to foundation designs. The study found that the Baviaanspoort site is underlined by soil horizons subject to both consolidation and collapse settlement, the soil class designation is C2. The study concluded that for the new structures, it is recommended that soil rafts be constructed as foundation. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 17 N A .,.. srll: consul":ing BAVIAANSPOORT PIPELINE WUA AREAS OF CONSERVATION CONCERN Figure 3 - 1 : Location of Ecological Support Area shown on site M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 18 3.10 Water Resources 3.10.1 Surface Water Resources The Crocodile River is a major tributary of the Limpopo River (Drainage Region A) which discharges into the Indian Ocean in Mozambique. The Moretele Spruit, Pienaars, Apies-, Hennops-, Jukskei-, Magalies- and Elands rivers are the major tributaries of the Crocodile River, which together make up the A20 tertiary hydrological catchment with its 39 quaternary catchments. The proposed pipeline falls within the Crocodile (West) major catchment which is included in the Limpopo Water Management Area as shown in Figure 3-2. The Crocodile (West) and Marico Rivers lie primarily within the North-West Province with parts of it in the northern region of Gauteng and the south-western periphery of the Limpopo Province. The Crocodile and Marico rivers are two major rivers in this WMA, which at their confluence forms the Limpopo River that flows eastwards to the Indian Ocean. More than half of the total water use in the Crocodile (West) and Marico comprises urban, industrial and mining use, approximately a third is used by irrigation and the remainder of the water requirements is for rural water supplies and power generation. To meet the current demand, much of the water in the WMA is being transferred mainly from the Vaal River system for domestic and industrial use purposes. The proposed development falls within a sub-catchment of the Apies Pienaars River Catchment. Apies-Pienaars River Sub-catchment Area A major part of this area is densely populated with the City of Tshwane (Pretoria) situated in the higher lying southern portion of the sub-catchment. The bulk of the water requirements of this area are supplied by Rand Water, sourced from the Vaal River System, although significant quantities are also supplied from groundwater and from local sources. Irrigation in this sub-area is significant, with an estimated 67 km2 of irrigated crops. A23A Quaternary Catchment The Pienaars River originates east of Pretoria, City of Tshwane, Gauteng Province, flowing northwards into Roodeplaat Dam (north of Mamelodi), from where it carries on northward until it passes under the N1 and turns westward. North of Makapanstad the Apies River (or rather a short section of the Tshwane River) joins it from the left, as well as the Plat River from the right. The Pienaars continues flowing westward to the Klipvoor Dam. About 25 km further downstream it joins the Crocodile River's right bank. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 19 N A gend -~- ... """" FF _ADJ AajacenaE,ven Adjau:nl Farm POl'llons Al'leCleG Fami POftiOM WMA oat.a Sou1te BAVIAANSPOORT PIPELINE WUA 15KJ812018 DEBW -;-srk consulting Pfoietl NO Ag No WATER MANAGEMENT AREA 498454 A~IOn A Dale 15f0&l2018 Figure 3 - 2 : Border of the Limpopo W ater Manage m ent Area in relation to the develop m ent M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 20 3.10.2 Mean Annual Runoff (MAR) The natural surface Mean Annual Runoff (MAR) is approximately 646 million m3/annum. The theoretical recharge of this WMA is estimated to be 260 million m3/annum, with only about half of this currently being utilised. A summary of the natural MAR, together with the desktop estimate of the ecological requirements (Ecological Reserve) is provided in Table 3-5 (DWAF, 2004). Table 3-5: Natural MAR and Ecological Reserve (million m3/annum) (DWAF, 2004) Sub-area Natural MAR Ecological Reserve Upper Crocodile 253 57 Apies / Pienaars 142 34 Elands 113 15 Lower Crocodile 138 25 Total for WMA 646 131 3.11 Floodlines and Hydrology The catchment area was delineated using the 1:50 000 topographical map together with the 1m contours from CoT and the contour data supplied by SG Henning Surveyors. The hydrological and hydraulic parameters of all the catchments contributing towards the proposed site of development were calculated. The catchment hydrology was determined by characterising the hydrological and hydraulic parameters of the catchment within which the future developments may take place. In order to obtain realistic and integrated flood peak data, the City of Tshwane (CoT) municipality was divided into seven major basins. The Storm Water Management Model (SWMM) Soil Conservation Service (SCS) hydrological model was then compiled for each of the seven basins for potential fully developed land-use as obtained from the CoT Town Planning Department to determine the peak flow rates. The peak flow rates were then entered into the Hydrologic Engineering Center's River Analysis System (HECRAS) model to determine relevant flood levels and associated floodlines. The extracted flood peaks together with the catchment area are summarised in Table 3-6. Table 3-6: Summary of flood peaks (Future Development Conditions) River Catchment Peak Flow Rate (m3/s) Segment & Area (km2) 1:50 1:100 Chainage PN6427 355.4 887 1026 PN5385 357.7 892 1032 3.11.1 Results Findings of the Floodline Study The results showed that the average flood depth of the 1:100 year floodline along the left floodplain where there is existing infrastructure is expected to be between 1.8 m and 2.1 m. This is a high flood depth and thus damage to infrastructures situated within the 1:100 year flood line can be expected. There is a possibility of soil erosion due to high flood velocities which are between 2.3m/s and 3.0m/s along the left river banks. The hydrology study conducted for the Baviaanspoort CSF did not however cover the whole length of the proposed pipeline. Floodline information obtained from the City of Tshwane shows that a section of the pipeline (approximately 1.19 km long) will be located within the 1:100 year floodline as shown in Figure 3-4. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 21 3.12 Surface Water Quality The closest Water Quality Monitoring site from the proposed development is WMS 90239 A2H127Q01 Pienaars River at Baviaanspoort. It has been monitored since 1995 and the last available results are for last quarter of 2016. The chart showing the results can be viewed in Figure 3-5. Prior to 2015 it appears that the water quality appears to have been very stable. Higher Total Dissolved Solids, Phosphates and Nitrates were reported in 2016.These may be indicative of possible pollution from the Baviaanspoort Waste Water Treatment and not from upstream development in the catchment. The extreme values may have been linked to specific incidents since the median values are well within acceptable parameters. The summary values can be seen in Table 3-7. Table 3-7: Summary of concentrations of selected compounds Compound Min Max Number of 90thPercentile Median mg/l mg/l Samples mg/l mg/l TDS 128 511 402 436 361 Phosphate as PO4 0.005 7.12 478 0.474 0.06 Nitrate and Nitrite as NO2 0.02 30.7 472 0.658 0.071 and NO 3 The National Freshwater Ecosystem Priority Areas (NFEPA) database classifies the Pienaars River as C-moderately modified. Class C NFEPA rivers are rivers where a loss and change of natural habitat and biota has occurred but the basic ecosystem functions are still predominantly unchanged. Although the NFEPA wetlands database shows that there are wetlands associated with the Baviaanspoort WWTW, located within 500m of the proposed pipeline, these are dams located at the WWTW. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 22 N A Slope Vllleyhead seep Wl~lool' uncnamel!OVMey-00CIOmwetllnd Date C0mpNGDy BAVIAANSPOORT PIPELINE WUA 16'0612018 OEBW Prqe(:1 HO Ag NO RIVERS, DAMS, WETLANDS 498454 1&0e,'2018 Figure 3 - 3 : Water Resources M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 23 N A Adjacent Fam, Portions Affecteo Farm Poruons oataSoun::e BAVIAANSPOORT PIPELINE WUA =rsrk consulting FLOODLINES Figure 3 - 4 : Floodlines M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 24 WMS 90239 A2H127O0 1 Pienaars River at Baviaanspoort (Magaliesberg) Site at 28?21'30.9"E25?41.42.0"S, type:Rivers. Data from 1995-01 -23 10:56:00 to 2016-1 0-24 10:00:00 Variation about the median. colo\K~oded 11ec0 47.2 16.8 'n,.. ~1•111 ' •, Ir .•.. •••,"11 ''If'•••• .. ••·' ·r"'· ""'(r'l•• 1••• ·"'•11'"" ' ,I .••ri.,.•r'' ·••• .,,, , •..• ,._,, •J. "fl'·-· .,11.,,, l"Pr .Jfh1.,, N 1" •"·· ·1• r . ,,-J,I •••p•r' ·•• ,,,.~., . .. . " "··· ''"lrl . "·r, 1,.,,,. •·•1p11 ,,···J~1•1.,p 1•' r••• ,., ' ,,1•· ·•• ··11, ir ,,J .J1~(, 11 ,.~j 11 I ~ ,r,. •" ,.,. ii, mS/m pH ;;; --,-'1TT[TTl''I'', " .J,. .. 1,, , '11'1, •1 ,ii /"-r•l~.,....~..,.-----~~nr, i . ·,, 11' , I ~~1·•"""'•I, i ·1111 I , 1• IJl*'F011r 8.22 pH 16.6 ◄ . 2 -~-~l.1 , ... - ., .• , [.. ____ ...... " ..l .....L. ,.., " ... , ... L ... -•, ..... L •., .. --'"- ... -"·- ···~ ·-· ··• ·••·..... >. ·- -·---•• .l . L.. !.~-, ... _,, ...... ,.~ .. ---~,_~c ., __. •• .L " .il~II ,uiIii,. m~Na 15.2 ~ 2.87 ,~: __•. ,... 1,,1. 1, ...... ,,., 1.., ,,,,._.,, ___.L ,.J _1 ... . ,,,.. ,.l ...... ,··- ./.. J .c.,.. .. 1,.1 ...... 11, .. ,. ,,,J .... ,...... T .... ., ...... 1,..J ... 1,.. 1.. .. ____ ..l •..• ~ ...... ,...... , .... 1. ._..11.1111.Jrn111 ,. mg/LK Ca H ~~:: _ IJ.J~n '· 1 I ·r .J ,I ,~l~I r·1r· ,.-~..,,, .• ,.. ,,1j11~),r'•1•r'T ... ,.,,1'II"• ' ·'1r\,·1'u,1~ 1t' ,,, .. ,.,,. ,. "l"p·-..· ·· 11 ···r ,J l.1,1, .,·t···-·r ,r ,~,., Ill., .-.•-••-•11 " rp·r..- .J 'j•·-~,-•11 ,IIL... '"rir('' ••111 ••,1··· ·•1l11 ,o·,•r~r•lw r,,~••- -' ,, .,1 •-1••-n· 1•\r·.l,,~d)_J'," ,, .. I I 35.1 mgllCa 33.6 26.8 :,2: - -,-,1"111. ,,, ... ,Ji/, /\r"""'"'"'··"'"•"l•'1"N~~.,.,,r · ·•"·n''"' .,, r ""\'Y'"" sp·"""l ' '" Jll••r •' r'""--r ,r"'" ,, " .. ~.., •,r•t ,IIJ,. , , .. . ,.i.,. -!~/' •1i ,7",ll½,,·,.JI .,,,., ,,.,,.,L,. ,,· ·""'~ ,,,, . 'I"', ··•r "' I mg/LMg er 20.9 5 __._. _..,.,,,I, ' ' 1, 11 ·• 11•'' ... 1lp1 11,1111••u '11•"""' J,,J_,, ,..I...... ,1,1111 .,, .. J,. ,..--•-•· .... •r·••, J'-•• ,,, ·rp _, ••11 .,... ,. •, ,, ...... \, ~ .. T •• , ··••r '1"" ·- .. ~. , ,.JJl, ,1 ·•····L- .~ tu.J .... ~ ... ~-- ··••rr .. •·I I i,•,J ··---n n·•· .. ···-··· ..., l .... . I ., ... _,.,•• , " ..... )_.,JILUl1 ., u11 111' . mg/LCI ; ;; :~~: --1.i,,.Jbllll 1, , 1r • .. ,.,_., t .... ,,J. .. ..,.1. J,,,,, 1..Ji•• ,J.. ..,.. ,. ,...... ,Lr'' L, .... •r·· .. ,..i.•~- ...... l ... ,~L ,.,.1 ,~1-, 1,i l.t.., fi..-.,,, -,J.,J.,., ,1, • . ,_,1r,• ., j -••-/-.J ..... J,...... ~ .,,.,,r ,.•..• ,,...,1. ,. ,., 11f,..," " ,,.11 ,....,. ••• -,.- ,..,LJ.11. "'r J J1..i,L~ J ~JJI. , mg/LS04 TAL ,:: ·n-1''"'1' 'I" ... ,)1/1 /'P""'·""•··""'l•1·'l"'lf ·"rljl"'"' .L"-,17' ,,i,.1, ,,·"P" ,1,~"·v ···1 ,1 .. ,.1, ,1't'·--1 ~I"'""'·\· r I' "l"'f "N' ,, .. ,1-J,, "L"i(HI! t•T·"l\\-'J'•")II\·- n'"''" 1r·'""'r· "II' .. ,11.0, ,,,n ,r,. I "'mg{l TAL = I : 07'~~~ _ J111 ~i,kl,., . ---·•···-••-·-•• "• ~··· --~-·- •- -····-···-· ...... _._ _..,..._.,, ·-· L_ . ,_ , ,, 1 ~ ,.., L..,. , ,u... ..,1.,,..1.,i ,.IJ •;Ir••--~ .• ., ..,~Ul .1. •. , •-,i,lJ_u.L,jl.1 mg/LF 8 ; ,_,u___:"--:--=~ - -.-,.. -...= ~... _ L...L:---LJ_~ J=:.. ._ __ i . .. _=_JJ. ...-'--- ..,_____•'- .... =---.. -.- ...... L.-.•.•L ..l.L_.___.LL_II: .J=: ;:i== _ :=...., ...= ...... _.-..... ==..- .. 0 ==.. - ___ ..= .. ·--=.....~ __.__ :__ =_ ,___ ~=.J:t:= E" 0.071 NH:(N)':'.!1 . . . I ' '.. .. J " I.. 1 .. 11 • l1 ,I mgN/LNH4 KjelN(NJ 0.863 045 mgNIL Kjel_N 13.7 SiO~ 7.73 mgllSi ,.. Baviaanspoort Pipeline Project No. + srk consulting Water Quality Trends of Pienaars River 498454 Figure 3 - 5 : W ater Quality Results for samples taken by the Department of Water and Sanitation between 1995 and 2016 on the Pienaars River at Baviaanspoort M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 25 3.12.1 Ecological Status of the Upper Pienaars River The overall Eco Status for this study unit is POOR (Department of Environmental Affairs and Tourism, 2005) and comprises the following indices: • The Instream Habitat Integrity is POOR primarily because of flow and bed modifications upstream from the Roodeplaat Dam caused by high levels of urbanisation and land-use activities such as small holdings, and chicken and dairy farming. Urban return flows contribute to higher than normal flows in the summer months and illegal dumping of garden refuse and building rubble on unoccupied land is problematic; • The Riparian Zone Habitat Integrity is POOR - urban flood waters cause severe bank erosion. Below Roodeplaat Dam there is quite a lot of sedimentation. Channel modifications are mainly due to berms used for storm water management purposes; • Riparian Vegetation Integrity is POOR - riparian vegetation in many areas has been cleared for development, from Lynwood Road to Magaliesberg there is no vegetation in the riparian zone and below the Roodeplaat Dam many developments are impacting on the riparian fringe. There is also serious alien vegetation infestation mainly of blue gum and wattle species; • The Fish Assemblage Integrity is also POOR – sensitive species such as Chiloglanis sp. (rock catlet or suckermouth) and Amphilius sp. (stargazer mountain catfish) are lost because of urbanisation and flows from sewage works. Even hardy species are under stress • Macro-invertebrate Integrity is POOR - reduced water quality has the largest impact on invertebrates; • Water Quality is FAIR, flows have intermediate levels of nutrients but are free from significant organic pollution. Main sources of pollution include urban return flows, sewage spills, and chicken and dairy farming activities. (Department of Environmental Affairs and Tourism, 2005) Ecological Importance and Sensitivity (EI&S) EI&S is MARGINAL / LOW - riparian and instream biotic diversity is low. Habitat types although not varied provide some unique examples: the Colbyn wetland in Hartebeespruit is a peat wetland, with more wetland types found upstream of the Silverlakes Golf Estate. Conservation areas include Bronberg, Fairie Glen and Moreletaspruit. (Department of Environmental Affairs and Tourism, 2005) 3.12.2 Drivers of Change (Department of Environmental Affairs and Tourism, 2005) • Roodeplaat Dam altering natural flow regimes – wall construction does not allow flexible releases; • An increase in impervious surfaces due to increasing urbanisation has resulted in higher than normal peak flows, especially in the summer months; • Lack of riparian vegetation zone in many areas because of high levels of development and poor management; • Reduced water quality impacting on aquatic fauna and flora. Management Responses • Control impingement of development into the riparian zone; • Improve solid waste disposal facilities and educate people of the impacts of littering • Stabilise bank erosion; • Identify and control sources of pollution that are reducing water quality; MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 26 • Map wetlands that require protection and investigate ways to conserve them; and • Remove alien trees, especially wattle and blue gum. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 27 4 Description of the project The existing rising main, that discharges the sewage from the Baviaanspoort prison to the Baviaanspoort WWTW, has been causing numerous problems over time. Regular pipe bursts have occurred over the past years causing environmental spillage concerns. The existing rising main is approximately 33 years old and has reached the end of its operational life. The existing pipe is mainly Asbestos Cement (AC) with an approximate diameter of 250mm. Limited sections have been replaced with Unplasticized Polyvinyl Chloride (uPVC). As part of the WWTW upgrade project, a complete new pipeline will be designed and installed, parallel to the existing pipeline. The existing pipe will be replaced with a new continuous welded High Density Polyethylene (HDPE). Horizontal drilling will be done for the road and river crossings. Table 4-1 and Figure 4-1 provide a summary of the properties and design parameters of the proposed pipeline. Table 4-1: Proposed New Pipeline and Pump Parameters Description Unit Value Material N/A HDPE, PE100 Standard Diameter Ratio (SDR) N/A 13.6 Nominal Diameter mm 250 Pressure Rating Bar PN 12,5 /PN 10 Average Wall Thickness mm 20 Internal Diameter mm 212 Assumed Friction Factor (New) C 140 Manning n 0.01 Joining Method N/A Butt-Welded Length m 2900 Flow Velocity m/s 1.3 / 2.8 Static Head (Ave) m 46.5 Design Capacity m3/h 162 Calculated Pump Head m 63.2 MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 28 BAVIAANSPOORT RISING MAIN Duty Point: Q =45 1/s @ H =63.2 m 75 .. + t .. ± t __J_ t t f f f .. f f t 70 .. 1-- ---1-.. t .. t I T I 65 f f t t t 1 t .. ..t ..t t t .. .. t 60 f f f f :[ t t t "O t .. t ::c 55 f f f + + f -4 t t T .. t 50 1f ~ f f + .. t:__ t .. + L, t 45 r- f t- t .. .. + t t t t t 10 20 30 40 50 60 Flow (l/s) Figure 4-1: Baviaanspoort Rising Main System Curve For the section of the pipeline crossing the Pienaars River, there are two options that are currently being considered. The engineers will make the final judgement of the best option once they have inspected the current pipeline. The options include: • Cutting off current uPVC pipeline and replacing it with a new piece of pipeline; or • Making use of a boring machine and installing a new pipeline underneath the Pienaars River. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 29 5 Construction 5.1 Access The existing access roads will be used throughout the construction period. Access to the river will be controlled and will be through one access point that will be determined prior to commencement of construction activities. Indiscriminate movement into and across the river will be strictly forbidden. 5.2 Water for construction purposes Water for construction will be obtained from the Municipal Water Connection. 5.3 Power All machinery used during the construction will be diesel/petrol driven. Where required, electricity will be procured from the normal service provider since the area is electrified. 5.4 Sanitation Appropriate sanitary facilities will be provided for the life of the construction phase and all waste removed to an appropriate waste facility. All sanitary facilities will remain outside of the 1:100 year floodline of the Pienaars River. 5.5 Contractors Camp and Laydown Area The contractor’s camp and laydown areas shall be located outside the 1:100 year floodline of the Pienaars River. 5.6 Materials Handling 5.6.1 Stockpiles of Raw Materials The stockpiles will be placed in such a way that they will not impact on any water resources. It is anticipated that the Contractor will make use of a local supplier of ready mix concrete and that it will not be necessary to store material such as cement, sand and stone for the mixing of concrete on site. 5.6.2 Fuel Storage To prevent earthmoving machinery moving in and out of the site and disrupting traffic in the area diesel will be stored on site. Diesel will be required primarily for the earth moving equipment. The demand for diesel is estimated at 10 000 litres per month. On-site storage of about 5 000 litres in above ground storage tanks will be required to ensure the continuation of the construction activities. 5.6.3 Construction Materials • Bulk earthworks: Suitable excavated material from the trench will be stockpiled adjacent to the excavated area and used as backfill after the pipe has been laid. Material not suitable for backfilling and all excess excavated material that is not required for backfilling will be disposed of at an approved landfill site. • Pipeline: Pipes will be sourced and delivered from one of the main pipeline suppliers and will be laid and welded together on site. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 30 5.7 Employment and Occupational Health and Safety It is anticipated that the contractor who will be appointed to do the work will be responsible for recruiting people, including those from the surrounding area. As a basis, all contractor employees and visitors will undergo induction training with regard to health, safety and the environment. This training will be required prior to entering the site for the first time and will be required each time the conditions on-site change such that additional training is required. Personal Protective Equipment (PPE) will be issued by all persons entering the construction site. PPE includes safety shoes, goggles, earplugs, gloves, hard hats, masks, etc. The PPE required will be dependent on the area that the person is working in, as well as the activity he/she is undertaking. 5.8 Construction Methodology for the Pipeline The construction methodology for the proposed pipeline will be as follows: 1. Develop final pipeline route and mark with stakes. 2. Prepare the ground by grading and removing vegetation along the pipeline route. 3. Topsoil removal and stockpiling outside the 1:100 year floodline of the Pienaars River. 4. Staking of the centre of the trench area, laying or stringing of sections of the pipeline along the pipeline route. 5. Pipe is welded and contoured (if required). 6. Pipe is lowered into trench. 7. Pipe is placed in the trench and backfilled with stockpiled soil. 8. Rehabilitation of site. 5.9 Maintenance The DPW will be responsible for the management, maintenance and repair of the proposed pipeline. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 31 6 Risk Assessment and Mitigation 6.1 Approach and Methodology A risk assessment in terms of the DWS Risk Assessment Methodology contained in Government Notice (GNR509) was conducted by the consultant, who is a registered with the South African Council for Natural Scientific Professions (SACNASP) as a Professional Environmental Scientist. The matrix provided by the DWS was used for the risk assessment. The risk assessment, takes cognisance of criteria and classifications as is shown in Table 6-1 to Table 6-9 Table 6-1: Severity (How severe does the aspects impact on the resource quality (flow regime, water quality, geomorphology, biota, and habitat). Insignificant / non-harmful 1 Small / potentially harmful 2 Significant / slightly harmful 3 Great / harmful 4 Disastrous / extremely harmful and/or wetland(s) involved 5 Where "or wetland(s) are involved" it means that the activity is located within the delineated boundary of any wetland. The score of 5 is only compulsory for the significance rating. Table 6-2: Spatial Scale (How big is the area that the aspect is impacting on). Area specific (at impact site) 1 Whole site (entire surface right) 2 Regional / neighbouring areas (downstream within quaternary catchment) 3 National (impacting beyond secondary catchment or provinces) 4 Global (impacting beyond SA boundary) 5 Table 6-3: Duration (How long does the aspect impact on the resource quality). One day to one month, PES, EIS and/or REC not impacted 1 One month to one year, PES, EIS and/or REC impacted but no change in status 2 One year to 10 years, PES, EIS and/or REC impacted to a lower status but can be improved over this period through mitigation 3 Life of the activity, PES, EIS and/or REC permanently lowered 4 More than life of the organisation/facility, PES and EIS scores, a E or F 5 PES and EIS (sensitivity) must be considered. Table 6-4: Frequency of the activity (How often do you do the specific activity). Annually or less 1 6 monthly 2 Monthly 3 Weekly 4 Daily 5 Table 6-5: The frequency of the incident or impact (How often does the activity impact on the resource quality). Almost never / almost impossible / >20% 1 Very seldom / highly unlikely / >40% 2 MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 32 Infrequent / unlikely / seldom / >60% 3 Often / regularly / likely / possible / >80% 4 Daily / highly likely / definitely / >100% 5 Table 6-6: Legal issues (How is the activity governed by legislation) No legislation 1 Fully covered by legislation (wetlands are legally governed) 5 Located within the regulated areas Table 6-7: Detection (How quickly or easily can the impacts/risks of the activity be observed on the resource quality, people and resource) Immediately 1 Without much effort 2 Need some effort 3 Remote and difficult to observe 4 Covered 5 Table 6-8: Rating Classes Rating Class Management Description Acceptable as is or consider requirement for mitigation. 1 – 55 (L) Low Risk Impact to watercourses and resource quality small and easily mitigated. Risk and impact on watercourses are notably and require 56 – 169 M) Moderate Risk mitigation measures on a higher level, which costs more and require specialist input. Licence required. Watercourse(s) impacts by the activity are such that they 170 – 300 (H) High Risk impose a long-term threat on a large scale and lowering of the Reserve. Licence required. A low risk class must be obtained for all activities to be considered for a GA Table 6-9: Calculation Consequence = Severity + Spatial Scale + Duration Likelihood=Frequency of Activity + Frequency of Incident +Legal Issues + Detection Significance \Risk= Consequence X Likelihood The following points were considered during the risk assessment: • Risks and impacts were analysed in the context of the project’s area of influence encompassing: o Primary project site and related facilities that the client and its contractors develop or control; o Areas potentially impacted by cumulative impacts for any existing project or condition and other project-related developments; and o Areas potentially affected by impacts from unplanned but predictable developments caused by the project that may occur later or at a different location. • Risks/Impacts were assessed for all stages of the project cycle including: o Construction; and o Operation. • Transboundary effectswere assessed; • Individuals or groups who may be differentially or disproportionately affected by the project because of their disadvantaged or vulnerable status were assessed; and • Attention was paid to describing any residual impacts that will occur after rehabilitation. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 33 6.2 Risk Assessment Results The risk assessment concluded that the risk of the project to the aquatic environment was medium. However according to GNR509, when applying the risk assessment method, allowance can be made for scores which are just outside the low risk class to be manually amended (to a maximum of 25), after considering additional mitigation measures, alternatives (methods) or specific activities, to reduce a risk rating class from medium to low. The results of the risk assessment are summarised in Table 6-10. The summary includes the significance of potential impacts on the riparian and wetland ecology as well as the hydrology of the project area. Impacts have been assessed separately for the construction and operational phases of the project. It is not envisaged that the pipeline will be decommissioned in the near future, however should that become necessary, the risks associated with the decommissioning activities are considered to be the same as for the construction phase. The full risk assessment matrices are included in Appendix F. In addition, mitigation measures are stated, as well as the significance of the impacts after mitigation has been implemented. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 34 Table 6-10: Risk Assessment Activity Aspect Impact Control Measures Likelihood No. Phases Consequence Significance Risk Rating Confidence Adjustment Required Score Adjusted Risk Site preparation Removal of vegetation • Exposure of soils, leading to 8 8 64 M 3 • Contractor laydown areas and material storage facilities to remain outside of the 1:100 year floodlines. -9 L prior to and associated increased runoff and erosion, • Vegetation removal to be kept to a minimum. construction, disturbances to soils and thus increased including sedimentation of the • Retain as much indigenous vegetation as possible. placement of instream habitat. • Limit vehicle/machinery activity within the active channel to what is essential. contractor • Increased sedimentation of • Maintain sediment/erosion control devices to minimise risk of sedimentation of downstream areas. laydown areas riparian habitat, leading to • Sediment control devices to be in place prior to the commencement of site preparation activities. and storage smothering of flora and Construction facilities potentially further altering • The duration of impacts on the riparian areas should be minimised as far as possible by ensuring that the duration of surface water quality. time in which flow alteration and sedimentation will take place is minimised – therefore the construction period should be kept as short as possible. • Decreased Eco-service provision. Exposed soils to be protected by means of a suitable geotextile covering such as hessian sheeting. Excavation Temporary diversion of • Possible incision/erosion 9 8 72 M 3 • Ensure sediment control devices are in place prior to diverting the stream. -17 L within the active stream to allow for near the diversion because • Maintain sediment/erosion control devices to minimise risk of sedimentation of downstream areas. channel for the excavations to take of the (temporary) formation foundation of the place. of a concentrated flow path. • Exposed soils to be protected by means of a suitable geotextile covering such as hessian sheeting. pipeline • Possible sedimentation of • The duration of impacts on the riparian areas and instream flow should be minimised as far as possible by ensuring downstream areas during the that the duration of time in which flow alteration and sedimentation will take place is minimised – therefore the diversion. construction period should be kept as short as possible. • Possible moisture stress to • Limit vehicle/machinery activity within the active channel to what is essential. ● Ensure water movement is maintained riparian vegetation through the system always. downstream of the diversion. • Ensure that no mounds of topsoil are left on the site. Movement of • Disturbances of soils leading • Re-fuelling of vehicles to take place outside of the riparian zone & associated buffer zones, on sealed surfaces. construction to increased alien vegetation • Regarding any potentially necessary temporary stream diversions, special care should be taken to keep the footprint of machinery/vehicles proliferation, and in turn to activities as small as possible. within the active further altered riparian • Special care must be taken to prevent sedimentation of the downstream resources. channel. habitat. • Any alterations to the stream bed substrates must be suitably rehabilitated with special mention of removal of sediment • Possible contamination of deposits and any rough debris associated with the proposed bridge construction activities. riparian soils, instream Construction sediment and surface water, • Ensure that stream beds are rehabilitated with smooth river cobbles where necessary. Disturbances of soils leading to further reduced • Flow continuity and connectivity must be maintained throughout the proposed bridge construction activities. ability to support biodiversity. within the active • No building materials associated with the proposed pipeline installations must be left instream on completion of the channel. Removal of • Altered runoff patterns, construction activities. topsoil and creation of leading to increased erosion • No litter or waste should be dumped instream for the duration of the construction activities including litter resulting from soil stockpiles. and sedimentation of riparian contractor presence on-site. habitat. • Pipeline installation within the river must take place under low-flow conditions to ensure impacts related to erosion, • Altered flow regimes. incision and sedimentation because of exposed soils and excavations are minimised as far as possible. • Impacts to stream • The construction of piles within coffer dams must be done as quickly as possible to reduce the duration of construction connectivity. activity within the active channel of the river. • Loss of refuge for aquatic • The extent of the cofferdam must be kept as small as possible. species. Stream diversion must be kept as small as possible; extreme caution must be taken to prevent sedimentation of d/s resources and activities must take place in low flow period. Installation of Possible spills/ leaks • Possible contamination of 4.75 8 38 L 3 • Maintain sediment/erosion control devices to minimise risk of sedimentation of downstream areas. -17 L pipeline from construction riparian soils and surface • Exposed soils to be protected by means of a suitable geotextile covering such as hessian sheeting. vehicles. water, leading to further reduced ability to support • The duration of impacts on the riparian areas and instream flow should be minimised as far as possible by ensuring that biodiversity. the duration of time in which flow alteration and sedimentation will take place is minimised – therefore the construction period should be kept as short as possible. • Limit vehicle/machinery activity within the active channel to what is essential. Construction • Ensure water movement is maintained through the system always. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 35 Activity Aspect Impact Control Measures Likelihood No. Phases Consequence Significance Risk Rating Confidence Adjustment Required Score Adjusted Risk Possible discard of • Alterations to flow patterns, • Ensure that no mounds of topsoil are left on the site. construction material possible contamination of • Re-fuelling of vehicles to take place outside of the riparian zone & associated buffer zones, on sealed surfaces. within the active water. • Vegetation removal to be kept to a minimum, and preferably only alien floral species to be removed. Retain as much channel and riparian indigenous vegetation as possible. zone. • All disturbed areas must be suitably rehabilitated. • Increased sedimentation of • Any alterations to the stream bed substrates must be suitably rehabilitated with special mention of removal of sediment areas downstream of the deposits and any rough debris associated with the proposed gabion construction activities. installation site. Increased sedimentation because of • Ensure that stream beds are rehabilitated with smooth river cobbles where necessary. Flow continuity and connectivity disturbances; must be maintained throughout the project. • Potential loss of indigenous • No building materials associated with the proposed pipeline installation must be left instream on completion of the vegetation and the further construction activities. proliferation of alien floral • No litter or waste should be dumped instream for the duration of the construction activities including litter resulting from species due to disturbances; contractor presence on-site. • Altered flow regimes. • Construction activities must take place under low-flow conditions to ensure impacts related to erosion, incision and • Altered stream depth sedimentation because of exposed soils and excavations are minimised as far as possible. profiles; • Alteration of stream substrate. Impacts to stream connectivity. 1 Re-profiling and • Movement of • Increased sedimentation 9 8 72 M 3 Duration of impacts must be minimised. Re-seed with indigenous species as soon as the pipeline installation is completed. -17 L re-vegetation of construction because of disturbances; • Ensure that runoff occurs in a natural diffuse manner with no unnatural concentration of flow. slopes in the machinery/vehicles • Potential loss of indigenous • vicinity of the within the active Soil erosion because of runoff from areas where invasive vegetation has been cleared must be prevented/ mitigated vegetation and the further through the application of biodegradable hessian material where required. pipeline channel. proliferation of alien floral • • Possible spills/ leaks species due to disturbances; When re-profiling takes place, it should be done to ensure water movement through the system always. • from construction • Loss of refuge for aquatic In areas of severe incision and erosion, banks should be re-profiled to an angle of 18 degrees. vehicles; species; • In areas where severe gully formation has taken place, these affected areas should be appropriately backfilled to achieve • Site clearing; and • Alteration of stream beds. the correct gradient. • Ongoing Alteration of depth profiles; • Final finishing and shaping must take place with topsoil free from invasive species. disturbances to the • Alteration of flow regimes. • A mulch cover may be required to stabilise the soil during the winter months when grass does not grow or grows poorly. riparian zone and disturbance and • All alien invasive floral species should be removed on a continual basis from the rehabilitated areas. compaction of soils. • All removed alien plant species must be disposed of at a registered garden refuse site and may not be burned on site. Where chemicals are used the following guidelines and precautions apply: o Do not transport chemicals in bulk as this gives the potential for serious accidents occur; tion o Apply chemicals in cool, dry and non-windy weather to prevent drift from reaching water bodies; o Contaminated equipment should not be cleaned in field; o Many chemicals (e.g. pesticides/herbicides) are harmful to human and environmental health, and should therefore Construc only be applied by properly trained and equipped workers that are registered according to the statuary requirements; o Herbicides and pesticides have the same toxic effect on aquatic plants and organisms as they do on the terrestrial plants and organisms to which they were applied. Therefore, when applying pesticides best practice guidelines should be strictly adhered to (as indicated in the label instructions) to minimise spray drift or wash-off into water resources and the killing of aquatic organisms. These include application under suitable weather conditions (i.e. sufficiently dry and calm), seeking professional advice on the type and quantity of pesticides that should be applied and considering the environmental conditions and hazards at the site; o Over application must not take place and spray plans should also be continuously updated to prevent over application and contamination of water resources; o Herbicide should not be used if weed cover is low. The best way to keep weeds at bay is to maintain healthy, dense vegetation that shades the ground surface, preventing weed seedlings from taking root. Mulching can also be used to prevent weeds. However, if weeds do take hold, they should be dug or pulled out; and o Herbicides should be used to spot-treat weeds only and not applied universally. • In steep areas ensure that energy dissipation takes place to ensure that under high flow conditions and times of high rainfall, water does not flow into the Pienaars River in such a manner such as to result in erosion and incision of the stream bed and stream banks. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 36 Activity Aspect Impact Control Measures Likelihood No. Phases Consequence Significance Risk Rating Confidence Adjustment Required Score Adjusted Risk • Ensure that runoff does not lead to excessive sedimentation in the area through careful planning of stormwater drains and similar structures. • Stormwater runoff must be managed taking into consideration areas of increased erosion potential. • If any erosion is observed the affected areas should immediately be rehabilitated through levelling the area, re-profiling of soils and revegetating the area. • Gullies and other areas of active erosion sites, if noted, should be stabilised through infilling with topsoil, cover with biodegradable hessian material/ geotextile such as GeoJute, and revegetated to minimise sediment entering the Pienaars River. Monitoring of Proactive monitoring to No direct impacts perceived. 3 8 24 L 3 • Limit vehicle/machinery activity within the active channel as well as in the riparian zone to what is essential. 0 L structural ensure structural • Disturbances to the riparian zone should be limited as far as possible. integrity of the integrity is maintained pipeline and and to identify early • Re-fuelling of vehicles to take place outside of the riparian zone & associated buffer zones, on sealed surfaces. manholes signs of erosion, • Activities should not obstruct flow. incision and alien • Where possible, existing access roads should be used for monitoring purposes to minimise the compaction of soils and vegetation loss of both riparian and instream habitats. encroachment. Proactive monitoring to • Hot spots for build-up of debris must be identified and debris must be regularly removed to prevent flooding and damage ensure that any litter or of infrastructure. In this regard, special mention is made of periods following high rainfall and subsequent high instream debris which may water volumes. accumulate on and • During monitoring, always use the shortest routes possible to minimise disturbance and loss of habitat both instream as around the pipeline is well as in the riparian zone. cleared to maintain the • The riparian zone must be monitored for alien vegetation encroachment and all alien vegetation/weeds must be removed flow of water. according to a suitable alien vegetation control plan. Monitoring of re- Proactive monitoring to Compaction of soils and loss of 3 8 24 L 3 • Any erosion or gully formation must be identified on an ongoing basis and re-profiled and revegetated accordingly. 0 L profiled slopes ensure structural habitat because of ongoing • Use of biodegradable hessian sheeting must be made to prevent sedimentation of downstream resources. near the. integrity is maintained disturbance from vehicles and pipeline and and to identify early machinery. manholes signs of erosion, incision and alien Operation vegetation encroachment. Monitoring of Proactive monitoring to No direct impacts perceived. 3 8 24 L 3 0 L water quality and ensure that the system instream is recovering sufficiently integrity both and not suffering harm upstream and post-construction downstream of activities. bridge installation Ongoing alien Proactive monitoring to Compaction of soils and loss of 3 8 40 L 3 0 L vegetation ensure structural habitat because of ongoing removal from integrity is maintained disturbance from vehicles and the affected area and to identify early machinery. Impacts to water signs of erosion, quality because of the application incision and alien of herbicides. Disturbance of vegetation soils and resulting erosion and encroachment. sedimentation. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 37 7 Management Plan 7.1 Development footprint • All rehabilitation footprint areas should remain as small as possible and should not encroach into neighbouring riparian areas unless essential. It must be ensured that the riparian habitat is off-limits to non-essential construction vehicles and non-essential personnel; • The boundaries of footprint areas, including contractor laydown areas, are to be clearly defined and it should be ensured that all activities remain within defined footprint areas. All storage facilities and contractor laydown areas are to remain outside of the riparian zone and the stream channel; • Appropriate sanitary facilities must be provided for the life of the construction phase and all waste removed to an appropriate waste facility. All sanitary facilities must remain outside of the riparian zone and recommended buffer zones; • All hazardous chemicals as well as stockpiles should be stored on bunded surfaces, away from the riparian zone and active stream channel, and have facilities constructed to control runoff from these areas; • It must be ensured that all hazardous storage containers and storage areas comply with the relevant South African Bureau of Standards (SABS) requirements to prevent leakage; • No fires should be permitted in or near the rehabilitation areas; and • Ensuring that an adequate number of waste and “spill” bins are provided will also prevent litter and ensure the proper disposal of waste and spills. 7.2 Vehicle access • All vehicles must be regularly inspected for leaks. Re-fuelling must take place on a sealed surface area to prevent ingress of hydrocarbons into the topsoil; • In the event of a vehicle breakdown, maintenance of vehicles must take place with care and the recollection of spillage should be practiced near the surface area to prevent ingress of hydrocarbons into topsoil and subsequent habitat loss; and • All spills should they occur, should be immediately cleaned up and treated accordingly. 7.3 Vegetation • Proliferation of alien and invasive species is expected within any disturbed areas. The vegetation component within the riparian zone is already transformed because of alien plant invasion; therefore, these species should be eradicated and controlled to prevent their spread beyond the project footprint. Alien plant seed dispersal within the top layers of the soil within footprint areas, that will have an impact on future rehabilitation, must be controlled; • Removal of the alien and weed species encountered within the riparian zone must take place to comply with existing legislation (amendments to the regulations under the Conservation of Agricultural Resources Act, 1983 and Section 28 of the National Environmental Management Act, 1998). Removal of species should take place throughout the construction, operational, and maintenance phases; • Species specific and area specific eradication recommendations: MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 38 o Care should be taken with the choice of herbicide to ensure that no additional impact and loss of indigenous plant species occurs due to the herbicide used; o Footprint areas should be kept as small as possible when removing alien plant species; and o No vehicles should be allowed to drive through designated sensitive areas during the eradication of alien and weed species. 7.4 Soils and sediment • Sheet runoff from work areas should be slowed down by the strategic placement of berms; • As far as possible, all rehabilitation activities, particularly those which involve activities within the active channel, should occur in the low flow season, during the drier winter months; • As much vegetation growth as possible (of indigenous floral species) should be encouraged to protect soils; • No stockpiling of topsoil is to take place within the recommended buffer zone of 16m around the riparian zone and all stockpiles must be protected with biodegradable hessian or a suitable geotextile to prevent sedimentation of the river; • All soils compacted because of rehabilitation activities as well as maintenance activities should be ripped and profiled; and • A monitoring plan for the rehabilitation project and the immediate zone of influence should be implemented to prevent erosion and incision. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 39 8 Rehabilitation Rehabilitation in this document refers to the reinstatement of the temporarily disturbed areas affected by the construction, or due to construction related activities, to a state that resembles the conditions prior to the disturbances. It therefore does not address the rehabilitation of the watercourses from for example a management category C to a B (Kleynhans, 1996 & Kleynhans, 1999). To improve the management category, the current impacts due to urbanisation and other anthropogenic impacts should be addressed and these fall outside the scope of this document. This rehabilitation plan recognises two phases of rehabilitation: • Phase 1: Construction of infrastructure, watercourse crossings; and • Phase 2: Operation where release of stormwater causes erosion, pollution or degradation of any sort as identified during the monitoring phase. Table 8-1 provides a summary of the rehabilitation measures that should be undertaken post construction as well as corrective action when monitoring has established that the listed impacts are taking place. 8.1 Objectives of Maintenance and Rehabilitation Activities/Terms of Reference All essential mitigation measures and recommendations as listed in this section of the report and have been adopted from the Rehabilitation Plan that was developed by Scientific Aquatic Services (SAS) for the application for a WUA for a Section 21 (c) and (i) WUA for the construction of a bridge and housing development within 100 m of the Pienaars River in Pretoria. A study of the Pienaars River conducted by Scientific Aquatic Services in 2016 found that the watercourse is not considered sensitive, from an ecological and goods and services provision point of view. The study concluded that management focus should be on the downstream portions of the watercourse through management of the geomorphological and hydrological processes, thus supporting habitat provision and support for the ecology of biota associated with the downstream receiving environment. Attention must be paid to the location and extent of the watercourse portions to be crossed to ensure that development related activities do not encroach unnecessarily into the watercourse and that ongoing functionality in these areas is maintained to ensure that habitat down gradient of the proposed development activity are is not adversely affected. 2 The Water Rehabilitation and Management Plan (WRMP)1F , once approved for implementation by the relevant authorities, is a legally binding document that all parties involved in the project must be informed about the importance of the WRMP 8.2 Surface Water Rehabilitation and Management Plan The Contractor is required to provide a detailed method statement before commencement of construction activities. The method statement will include the following, but not limited only to: • Biophysical description of the site; 2 The WRMP fits into the overall planning process of the development activities, with specific mention of the construction phase of the watercourse crossings and should be implemented by the proponent as soon as it has been approved by the relevant authorities and as soon as construction of the proposed development has reached a stage where management actions are required and when rehabilitation activities become viable MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 40 • Duration and timing of the watercourse crossings construction; • Itemised list of equipment that will be used for construction; • Measures to maintain hydrological connectivity in the system throughout the construction phase; and • Measures to be used to control sediment, spillage of any hazardous chemicals (solid or liquid). Monitoring as to provide rapid feedback on effectiveness of controls. Documentation must be prepared by the Contractor that specifies details pertaining to site planning and waste management. Table 8-3 serve to present the rehabilitation and management plan for the portion of the watercourse affected by the proposed pipeline. The mitigation measures provided in the plan, unless otherwise specified, are applicable to all aspects of the construction and operational phase respectively. These measures must be undertaken to mitigate the impacts of the action plans for the project area are prioritised as follows: Table 8-1: Prioritisation of rehabilitation/management actions applicable to the project area Significance of Impacts HIGH Disturbance of area with importance conservation value, destruction of rare or endangered species. No possible mitigation or mitigation is difficult, expensive, time consuming. MODERATE Disturbance of are with potential conservation value or of use as a resource; complete change in species occurrence or variety. LOW Disturbance of degraded area with little conservation value; minor change in species occurrence or variety. Mitigation easily achieved or only little mitigation required. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 41 8.3 Management measures pertaining to the rehabilitation phase of the proposed activities Table 8 - 2 : Control and mitigation measures for the rehabilitation phase of the proposed activities: adopted from (Preez, 2018) Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts 1 Site • The construction site must have strict access control to ensure that • Strict site access is implemented, and approval from establishment no unauthorised persons are onsite; the responsible person must be obtained. and access • Adequate signage must be placed around the construction area to • Sensitive areas (i.e. the watercourse) are clearly ensure that the public has been notified of the activities taking demarcated and signage erected to indicate the place; areas in which no activities is to take place, as “no- go” areas; • The construction footprint area within the watercourse should be barricaded with hessian curtains and barrier fences to prevent silt • All footprint areas temporarily barricaded and rich runoff into the unaffected watercourse portions; m arked. Care taken not to influence faunal mitigatory measures; and • The construction footprint areas within the watercourse must remain as small as possible and should not encroach into • Appropriate parking areas for construction vehicles upstream/downstream portions of the watercourse, except where have been located outside of the demarcated Low planned and if essential; watercourse. • Planning of access routes should avoid the watercourse and be restricted to existing or planned roads where possible; • If crossings over the watercourse is necessary in areas other than where activities are planned, crossings should take place at right angles to the system, to minimise the extent of transformation within the watercourse; • As far as possible habitat connectivity must be maintained, especially where the project footprint crosses the watercourse and its im mediate surrounding habitat. At no point should the hydrological connectivity of the watercourse be disrupted M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 42 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts completely by (construction) vehicle movement or diversion activities; • In areas where vegetation removal would occur as part of site establishment for construction activities, where possible, vegetation should be cut down to ground level instead of being removed completely to stabilise the soil during land- clearing operations; • Vegetation clearing should be kept to what is essential, to reduce the extent of bare soils, thus limiting erosion potential of the area; and • Dedicated parking area for construction vehicles must be located away from sensitive area, and drip trays must be located beneath any leaking equipment and lubricant/fuel absorbing media (such as sawdust) within drip trays must be used to contain spilled material. The absorbing material in the drip trays must be replaced regularly as to prevent over- saturation and potential spillage. This hazardous waste must be collected by an approved contractor/delivered to an approved waste disposal site. 2 Storage, • Adequate storage facilities for the storage of oils, paints, grease, • Cement bags are stored in appropriate weatherproof handling and fuel, chemical and hazardous materials to be utilised must be containers; spills provided to prevent contamination of ground and surface water and • Storage areas are clearly demarcated; and soils; Low • All hazardous storage containers comply with the • Storage areas must be demarcated and fenced, not be located relevant SABS standards. within very close proximity to the watercourse, and must be placed on impermeable surfaces such as concrete bund to prevent conta mination; M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 43 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts • Used cement bags are to be stored in weatherproof containers to prevent cement dust from being windblown into the watercourse • All fuel storage drums must be designed in accordance to the relevant oil industry standards, SABS Code and other relevant require m ents; • All waste must be removed from site and disposed of at a licensed Low landfill site; and • In areas where planned activities would occur within the watercourse, litter and general waste must be removed from the soil prior to stockpiling. • Pre- cast concrete must be used whenever possible; • Appropriate mixing trays and impermeable sumps are utilized during the mixing of concrete; • No mixed concrete shall be deposited outside of the designated construction footprint. A batter / dagga board mixing trays and • Concrete washouts are installed at appropriate impermeable sumps are to be provided, onto which any mixed demarcated areas; and concrete can be deposited whilst it awaits placing. Concrete spilled • In the event of spillage, the spill and associated o utside of the demarcated area must be promptly rem oved and material has been removed from site and disposed taken to a suitably licensed waste disposal site; of at licensed waste facilities. • Installation of concrete washouts: Concrete washouts are used to Low contain concrete and liquids when the chutes of concrete mixers and hoppers of concrete pumps are rinsed out after delivery. The washout facilities consolidate solids for easier disposal and prevent runoff of liquids. The wash water is alkaline and contains high levels of chromium, which can leach into the ground and contaminate groundwater. A washout area should be designated outside of the watercourse, and wash water should be treated on- site or discharged to a municipal sewer system; M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 44 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts • Appropriate handling and disposal of concrete and cem ent- related mortars should minimize or eliminate discharges into the watercourse. Fresh concrete and cement mortar should not be mixed on- site, and both dry and wet materials should be stored away from the watercourse. These materials should be covered and contained to prevent contact with rainfall or runoff; and • In the case of spillage (i.e. fuel, oil, concrete), the spill should be contained and the material together with any contaminated soil must be disposed of as hazardous waste 3 Rubble and • Any waste concrete and other foreign material used or generated • All rubble and litter associated with the construction W aste Removal during construction must be demolished and removed from site. All activities has been cleared, and no litter or rubble Low rubble and waste will be disposed of at a suitably registered landfill remains after construction has been complete site. Control of alien 4 • The removal of the alien and weed species encountered within the • An Alien vegetation control program has been and invasive plant species zone of influence of the proposed pipeline prior to any construction developed by a qualified specialist and a suitably taking place, must take place to comply with existing legislation qualified and experienced contractor has been (amendments to the regulations under the Conservation of appointed for the alien vegetation control; and Agricultural Resources Act, 1983 and Section 28 of the National • All alien vegetation is removed from site and Environmental Management Act, 1998); disposed of at appropriate facilities. • The appointed EC O should advise on plant identification and Low invasive categories, should there be any queries on species during the alien vegetation control process, and develop an alien and invasive species control program; • Proliferation of alien and invasive species is expected within any disturbed areas, and the riparian vegetation component of the watercourse near the proposed development is already transformed because of alien plant invasion; therefore, these M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 45 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts species should be eradicated and controlled to prevent their spread beyond the zone of influence of the development; • Alien vegetation should be m anually removed and chemical control is not recommended, so as to prevent chemical contamination of the watercourse; • Alien vegetation that is removed from the ground must not be allowed to lay on unprotected ground as seeds might disperse upon it. Additionally, all care should be taken in the removal of alien vegetation from the ground to prevent seeds from falling on it, including (if necessary and practical) the use of temporary sheeting around the base of the plant; • None of the removed alien species may be chipped and used as there may be seeds present within the mulch that will spread to areas beyond the present alien floral com munities; • No alien plants may be introduced to the development area and surrounding areas during the construction phase of the project and particular attention must be paid to ensure that any imported material, such as topsoil used for rehabilitation purposes, is certified weed- free; • In the removal of smaller alien shrubs and groundcovers, Category 1b, 2 and 3 alien species are to be prioritised in eradication. Non- liste d alie n species may also be hand - pulled. In all instances physical/ manual eradication techniques must be preferred over chemical treatment; and • All removed alien plant species must be disposed of at a registered garden refuse site and may not be burned on site. M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 46 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts • The areas to be rehabilitated must be shaped to blend in with the surrounding areas and vegetated according to the River Rehabilitation Plan (CoT, 2007). This includes: o the stabilisation of steep areas with geotextile to prevent erosion while grasses are established, o re- establish indigenous hydrophytic grass clumps and sedges o Compacted and disturbed areas must be ripped to a depth of 50 m m, o 30 m m of mulch shall be spread over the topsoil and worked into the soil, and o Hydro- seeding with an accepted indigenous veldgrass mix. • The rehabilitation will be m onitored, if the rehabilitation is not successful the contractor shall return to the site to rehabilitate the area again. Stormwater 5 • Stormwater on the site and surface run- off fro m cleared areas • Regular inspection is done by the ECO to identify Management must be managed to reduce the silt loads and runoff peaks into issues or potential infrastructure encroaching in the the watercourse. Therefore, curtains should be installed within the no- go areas (the watercourse); and applicable footprint areas, to prevent runoff of silt rich storm water • Excavation and vegetation clearance is limited to into the watercourse; Low what is essential. • The watercourse should be monitored for erosion and incision. If erosion is evident, a suitably qualified specialist should be informed and the erosion control plan must be amended in accordance to the mitigation measures provided and initiated; M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 47 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts • As far as possible, all construction activities occurring within the watercourse should occur in the low flow season, during the drier winter months; • Excavations should be limited in extent (only to what is necessary for where the proposed pipeline would be constructed) to ensure that drainage patterns within the watercourse returns to normal as soon as possible after construction; • Reduce airborne dust at construction sites through damping dust generation areas with freshwater (although not in sufficient quantities to generate runoff) Stormwater • The newly constructed low water bridges within 7 • All areas where the pipeline is to be constructed within the Management the watercourse are being m onitored for erosion Erosion and watercourse must be monitored for erosion and incision, and further and incision at regular intervals; Topsoil disturbance should not be permitted; • Excavated soil has been stripped and stockpiled • All excavated soil must be stripped and stockpiled within a at appropriate designated areas near the designated area, near the construction site, outside of the construction site, outside the watercourse; and • No significant erosion or incision observed watercourse, for subsequent use at a later stage; Low • Stockpiles must be protected from the wind and rain with the use of tarpaulins, where necessary; • It must be ensured that weeds/invasive alien species are eradicated from topsoil prior to spoiling; • All/any erosion and silt control mechanisms need to be regularly m aintained for the duration of the construction phase. Retain faunal • A qualified specialist has developed an alien 8 • It should be ensured that the watercourse has inundated soil and Floral vegetation control program and a suitably qualified Diversity conditions throughout the year, and that the seasonal zones should Low and experienced contractor has been appointed have water logged soils within 300m m of the soil surface always. for the alien vegetation control. M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 48 Objectives Protective measures Significance Key Performance Indicator (KPI) requirement of Impacts This will ensure that habitat conditions provided by the watercourse remain intact after the construction phase; • Where alien plant species have been removed within the watercourse, as well as within other bare areas, topsoil is to be reapplied to these areas and reseeded with an indigenous vegetation mixture to prevent erosion and ensure adequate vegetation cover to the remaining watercourse area surrounding the low water bridges; • No fires should be permitted in or near the construction area; and • Trapping, hunting or collection of faunal species must be prohibited M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 49 8.4 Management measures pertaining to the operational phase of the proposed activities Table 8 - 3 : Control and mitigation measures for the duration of the operational phase of the proposed activities Protective Measures Significance Key Performance Indicator of Impacts Stormwater • Edge effects of activities in the watercourse, including • Erosion and alien / weed control occurs for three Management erosion and alien/weed control, need to be strictly months post construction and during maintenance managed and continued for at least three months activities on the low water bridges post construction, and should be inspected during maintenance activities; and • The edge of the rehabilitated watercourse shall be Low m onitored on a regular basis for erosion and incision. If the erosion control measures fail to prevent further erosion, im mediate action should be taken to stabilize the slope (of the earth swale). A suitably qualified specialist should be informed and the erosion control plan must be amended in accordance to the mitigation measures provided and initiated Retaining faunal • It must be ensured that no additional impacts such as • Only single access road/existing road to the and floral indigenous vegetation clearing can occur near the watercourse is used during m aintenance activities; diversity watercourse; • No additional waste or litter is present within the • No trapping, hunting or collection of faunal species watercourse after maintenance activities has taken m ust be allowed during maintenance or monitoring place; and activities; Low • Alien vegetation is monitored and removed for at least • Disposal of waste or litter m ust be prohibited in the three months post construction, as well as during any watercourse. Any waste noted must be cleared maintenance activities of the low water bridges immediately during maintenance activities; • If vegetation adjacent to the pipeline is to be removed, it must be mowed or cut short to between M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 50 Protective Measures Significance Key Performance Indicator of Impacts approximately 6 – 9 inches as a maintenance procedure (at this height basal erosion of the grasses will be minimised (VDoT, 2007; CoB, 2014). The grass must not be ploughed, as ploughing disturbs the soils creating conditions for alien plant species to invade the area, as well as increasing the possibility of soil erosion by water runoff. The grass cuttings m ust be carefully collected and disposed of at a separate waste facility and not be allowed to enter the watercourse, as high grass loads can impair the water quality during the low flow season; and • All maintenance vehicles must remain on designated roads paths as far as possible with no indiscriminate driving through the watercourse. M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 51 9 Monitoring Plan The monitoring programme should include: • Establishing a baseline through the taking of photographs of identified environmental aspects and potential impacts on the pipeline, and prior to construction • The Contractor shall be held liable for all unnecessary damage to the environment. A register shall be kept of all complaints from the landowners (affected and adjacent) or community. All complaints / claims shall be handled immediately to ensure timeous rectification / payment by the responsible part The monitoring plan aims to establish whether rehabilitation was successful, whether maintenance or related activities have impacts and whether the constructed conduits have detrimental impacts on the watercourses after construction Table 9-1. 9.1 Monitoring Philosophy and Requirements Prudent monitoring of the rehabilitated portions of the watercourse is of utmost importance, as this will ensure a continual flow of data, enabling all parties involved to accurately assess and manage the progress of the rehabilitation interventions and any arising issues. To ensure the accurate gathering of data, the following techniques and guidelines should be followed: Site walk through surveys should be applied as the preferred method of monitoring (at specified frequencies) with specific focus on; Checking manholes for possible leaking of the pipeline • Erosion monitoring (for the duration of the raining season); • Sedimentation (for the duration of the raining season); • Alien and invasive vegetation proliferation (at the start and end of the growing season); • Surface water monitoring; • Waste and litter problems. • General habitat unit overviews should also be undertaken; • Stability and appropriateness of stormwater controls; • All data gathered should be measurable (qualitative and quantitative); • Monitoring actions should be repeatable; • Data should be auditable; and • Reports should present and interpret the data obtained. Table 9-1 illustrates data capturing for the monitoring plan. The monitoring plan comprises but is not limited to the following: • Identification of areas of concern. These are areas that are affected by disturbances such as: o Erosion; o Waste dumping; o Alien vegetation species encroachment; and o Soil compaction; MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 52 • Ensuring that the management/rehabilitation measures as stipulated in Section 10 of this report are adhered to; • A list of all alien vegetation species must be compiled as well as possible control methods such as manual, chemical or mechanical. • Gathering all equipment required for the monitoring process; and • Compiling a monitoring report. This monitoring plan must be implemented by a competent person/person and the findings submitted to the responsible authority for evaluation. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 53 Table 9 - 1 : Monitoring actions for the proposed development Aspect Monitoring Location Frequency of sampling Frequency of Report Content Equipment Reporting Erosion R e habilitation, 1. Cleared and compacted Monitoring of erosion should After every major 1. Brief indication of the method of 1.Global Positioning Syste m construction and areas where the pipeline is occur during construction after rainstorm / flood. assessment; (GPS) operation phases to be installed. every rainstorm and / flood, and M o nthly monitoring 2. Assumptions and Limitations must be 2. Camera during the operational phase report compiled by listed; 3. Field Form m onthly during first the w et 2. The downstream areas the appointed 3. Fixed point photography an GPS point season or during routine 4. Measuring Tape of the watercourse located E nviron m ental location taken of existing erosion in the maintenance inspections, as within the zone of C o ntrol Officer watercourse prior to, during and post applicable. influence of the proposed ( ECO) during the rehabilitation; and pipeline construction phase. 5. Map indicating where erosion is present. Surface Water Quality Pre- Construction Immediately upstream and W ater must be tested at least Report must be Results of the following must be discussed 1.GPS downstream of the once before construction compiled following in detail: 2. Camera proposed locality where commences. co mpletion of Physio- Chemical Water Quality including 3. Field Form the low water bridges are GPS co- ordinate of the monitoring field work. pH, electrical conductivity, Dissolved 4. Handheld multi probe to be installed. GPS co- point must be recorded so that Oxygen (DO) content as well as turbidity. ordinates of the monitoring monitoring takes place 5. Clarity tube locality to be recorded. consistently at the sam e point. 6. DO Probe (only essential if high turbidity is apparent). Construction Monitoring must be • W ater monitoring must Report must be Co m pare results to pre- construction As listed in Pre- Construction undertaken at precisely be undertaken on a two- co mpiled monthly for assessments and aspects as listed in pre- Equipment the same locality as the weekly basis. all data collected. construction report content. pre- construction • Assessing the condition m onitoring. of the manholes for leaks Post Construction Monitoring must be O nce a month for three months A once- off report to Co m pare results of pre- construction, As listed in Pre- Construction undertaken at precisely after completion of construction. be compiled. construction and post construction Equipment the same locality as the assessments and aspects as listed in pre- pre- construction construction report content. monitoring. W aste and litter problems All phases Construction camp and all 1. Identification of waste or litter 1. Monthly 1. Photos of construction sites where litter 1. GPS; areas where construction problems should occur daily m onitoring report and waste are present or not; 2. Field Form; and is taking place. where construction is taking compiled by the 2. Map of monitored construction sites; and 3. Camera place; and appointed EC O during the M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 54 Aspect Monitoring Location Frequency of sampling Frequency of Report Content Equipment Reporting All areas, which are 2. For the operational phase, construction phase; 3. If litter and waste was observed; frequently traversed by during maintenance activities. and recommended mitigations should be vehicles and personnel. 2. Report should be presented. co mpiled for three months post rehabilitation. Alien Vegetation Control Pre- Construction, 1.Within the watercourse 1. Regrowth of alien vegetation 1 Mo nthly m onitoring 1. Provide a list of species occurring within 1. GPS; Construction and which would be directly should be monitored monthly report must be the study area; 2. Field Form; and Post- intersected by the during the construction phase; compiled by the 2. Discuss the density of invasion; 3. Camera Construction proposed low water and appointed EC O 3. Riparian habitat integrity and risk to be bridges during the 2. Thereafter monitoring must be discussed; undertaken for three months post construction phase 4. Fixed point photography (Taking photo at construction, once at the end of and alien vegetation specific point at facing the sam e direction the first gro wing season, a nd reported on at least each time within priority area to show effect during maintenance activities. quarterly of alien vegetation control.); and 5. Map indicating where alien vegetation is present. 2. Upgradient areas of the watercourse which would be directly intersected by the pipeline. M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 55 10 Public Participation Process The list of adjacent landowners identified as is shown in Appendix XX, through a deeds search, were notified of the intention to apply for WUA. The Interested and Affected Parties (landowners and land occupiers) were notified of the project and application for water use authorisation via notification letters that were hand delivered, on-site notices that were put up around the project area as shown in Figure 10-1 and the location of the on-site notices is provided in Figure 10-2. A newspaper advertisement that was published in The Record Mamelodi East on 24 August 2018 and in The Record North on 30 August 2018 (Figure 10-3). The public participation process documentation is attached as Appendix •XX. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 56 Figure 10-1: On-site Notices MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 57 N A Legeoo * Sale Notice P ~os SA Ro•d• CLASS --s Data S01,11:;e Scale 1-31044 Proje<:1100. Dall.an GEO WG$84 central Mena1anrzone Date BAVIAANSPOORT PIPELINE WUA 31i0812018 DEBW consulting ProfectNo AgNo '?""srk SITE NOTICE 498454 RevisiOn A Dale 31.'06/2018 Figure 10- 2 : Location of o n - site n otices M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 58 The Record Mamelodi East The Record North Figure 10- 3 : Newspaper Advertise m ent M A N D/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 59 11 Section 27 Motivation 1. Existing Lawful Use (ELU): The Baviaanspoort WWTW has a water use licence. The Baviaanspoort Correctional Services Facility (CSF) is considered an ELU since it was constructed before the promulgation of the NWA. The DPW is however in the process of applying for a Water Use Authorisation for the upgrade of the Baviaanspoort CSF. 2. Redress past racial discrimination: The DPW construction sector transformation charter of 2006 aims to: Provide to the construction sector the first quantitative method for monitoring and evaluating the progress of an enterprise towards Broad-Based Black Economic Empowerment (B-BBEE) and thereby contribute to ending the malpractice of fronting: • Expand the employment potential and absorption capacity of the sector using labour-intensive approaches where economically feasible and possible; and • Address skills development in a manner that accelerates the advancement of black people, black women and designated groups with a particular emphasis on learnerships as well as technical and management training. The DPW B-BBEE Strategy of 2006 guides the DPW to give effect to the Broad-Based Black Economic Empowerment Act, 2003 by addressing enterprise development, preferential procurement, skills development and employment equity. These charters form part of the latest DPW strategic plan. The strategic plan is guided by a number of policies that are derived from the Government’s Medium-Term Strategic Framework (MTSF). 3. Efficient and beneficial water use in the public interest: As public trustee of the water resources, DWS must ensure that the water is protected, used, developed, conserved, managed and controlled in a sustainable and equitable manner for the benefit of all users. The Minister, through the department has to ensure that the water is allocated equitably and used beneficially in the public interest, while promoting environmental values. Authorising the construction of the new pipeline between the Baviaanspoort WWTW and Baviaanspoort CSF will reduce the chances of the pipeline failing and polluting water resources. The current pipeline is approximately 33 years old and has reached its end of operational life. In addition, the current pipeline is made of asbestos cement, which poses a threat of asbestos fibres in wastewater, which may end up in water resources, posing a health risk to aquatic organisms as well as downstream users. 4. The socio-economic impact a) of the water uses if authorised: Authorisation of the upgrade of the Baviaanspoort CFS, including the pipeline will enable DPW to recognise the rights of access to basic water supply and basic sanitation necessary to ensure sufficient water and an environment not harmful to health or well-being, as captured by the Preamble of the Water Services Act, 1997 (Act No. 108 of 1997). The provision of sanitation forms part of the National Development Plan (NDP- 2030) for South Africa, with Water and Sanitation infrastructure recognised as one of the Government’s Strategic Integrated Projects (SIPs), SIP 18. Furthermore, DPW has the legal obligation to comply with Section 3 of the Act 108 of 1997, which states that: • Everyone has a right of access to basic water supply and basic sanitation. • Every water services institution must take reasonable measures to realise these rights. • Every water services authority must, in its water services development plan provide for measures to realise these rights. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 60 Authorising the water use will also reduce the risk of the pipeline failing and contaminating water resources. It will also allow the DPW to replace the asbestos cement with a HDPE pipeline. The current asbestos cement pipeline poses a health risk to both aquatic organisms and downstream users. b) of the failure to authorise the water uses: Failure to authorise the water use will present limitations for the DPW to meet the legal mandate of rendering adequate wastewater treatment services to its residents. Should the DPW continue to make use of the current pipeline, it poses a significant risk to the health of aquatic organisms and human health through the high potential for pipeline failure of the old pipeline, or through the release of asbestos fibres into the wastewater, which may end up in water resources. 5. Any catchment management strategy applicable to the relevant water resource: The Catchment Management Strategy (CMS) for Crocodile (West) Marico Water as part of the Limpopo Water Management Area (WMA) will be developed once the Catchment Management Agency has been established. Until the CMS is developed, the Internal Strategic Perspective (ISP) for the Crocodile (West) Marico WMA is providing the framework for the DWS’s management of the catchment about responding to new water use licences and informing existing water users (including authorities) on how the Department will manage the water resource within the area of concern. 6. The likely effect of the water uses to be authorised on the water resource and on other water users: The study area is situated on the Pienaars River, which according to the NFEPA database may be classified as being Class C (moderately-modified. The state of the Pienaars River is described as follows: • The Instream Habitat Integrity is poor; • The Riparian Zone Habitat Integrity is poor; • Riparian Vegetation Integrity is poor; • The Fish Assemblage Integrity is also poor; • Macro-invertebrate Integrity is poor; • Water Quality is fair; and • Ecological Importance and Sensitivity (EI&S) is marginal/low. The risk assessment conducted for the project showed that the project would have a low impact on the Pienaars River. If the recommended mitigation measures are implemented throughout the design, construction and rehabilitation phases, no major negative impacts on the resource are anticipated. 7. The class and the resource quality objectives of the water resource: The surface and groundwater Reserve assessments have not yet been conducted for the Upper Crocodile sub- catchment. According to the DWS the preliminary reserve determination and ecological categorisation for selected rivers and wetlands in the Crocodile (West) Catchment, the DWS recommends that the river system in the catchment be managed to an Upper “D” category to achieve acceptable water quality. 8. Investments already made and to be made by the water user in respect of the water use in question: On approval of the project, the estimated capital cost of the proposed pipeline development is estimated to be approximately R 4.9 million. The cost of upgrading and refurbishing the Baviaanspoort CSF infrastructure will be approximately R 21.7 million. 9. Strategic importance of the water uses to be authorised: The effective functioning of the Baviaanspoort CSF, including the pipeline ensure that level of sanitation in the CoT remains MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 61 acceptable and therefore contributing towards a better life for all and contributing towards the goals of the National Development Plan (2030) for South Africa. The construction of the new pipeline will safeguard against the potential pollution of water resources as a result of pipeline failure and potential release of asbestos fibres from the current old pipeline. 10. The quality of the water in the water resource, which may be required for the Reserve and for meeting international obligations: The DWS released the preliminary reserve determination and ecological categorisation for selected rivers and wetlands in the Crocodile (West) Catchment. The study recommended that the detrimental effects of urbanisation in the catchment be managed through other means than the Ecological Water Requirements (EWR). The study found that water quality management of the discharges in the catchment would be the only way in possibly improving the ecological status. It is expected that the upgrade of the Baviaanspoort CSF, including the proposed pipeline will contribute towards the water quality management of the catchment. 11. The water use applied for will have a low impact on the quality of the water resource and will not negatively impact any international obligations. The management measures in place will ensure that the clean water run-off is separated from the dirty water run-off and that no polluted water will the released into the Pienaars River 12. The probable duration of any undertaking for which a water use is to be authorised: The following water uses were temporary during the construction phase: • Section 21 (c): Construction of water diversion structures within 100 m of the Pienaars River; and • Section 21 (i): Construction of water diversion structures within 100 m of the Pienaars River. The following water uses are permanent: • Section 21 (c): Construction of pipeline within 100 m of the Pienaars River; and • Section 21 (i): Construction of pipeline within 100 m of the Pienaars River. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 62 12 Conclusion SRK Consulting was appointed to prepare the WUA documentation on behalf the DPW for the construction and operation of a pipeline between the Baviaanspoort CSF and the Baviaanspoort WWTW. The risk assessment results indicated that the impact of the maintenance activities will be on low significance. Potential negative impacts on the water resource due to the project operations have been evaluated and mitigation measures have been recommended. The implementation of the identified mitigation measures will ensure that the negative impacts associated with the activities are minimised and / or avoided. A project manager will be resident on site and will be able oversee and ensure compliance to the above proposed mitigation measures as well as any recommendations from the DWS. Prepared by Ndomupei Masawi Senior Environmental Scientist Reviewed by Manda Hinsch Pr. Sci Nat Partner/ Principal Scientist All data used as source material plus the text, tables, figures, and attachments of this document have been reviewed and prepared in accordance with generally accepted professional engineering and environmental practices. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 63 13 References City of Tshwane. (July 2010). Guidelines for the Design and Construction of Water and Sanitation Systems. Pretoria: CoT. Clean Stream Biological Services (Pty) Ltd. (2015). Wetland Verification Study - Proposed Housing Development Zwavelpoort 373 JR, Portion 99. Pretoria: Lizette van der Walt. ClimaTemps. (2017, June 22). Pretoria Climate and Temperatures. Retrieved from ClimaTemps.com: http://www.pretoria.climatemps.com/ Department of Environmental Affairs and Tourism. (2005). River Health programme State of Rivers Report: Monitoring and Managing the Ecological State of Rivers in the Crocodile (west) Marico Management Area. Pretoria: DEAT. Department of Water and Environmental Affairs. (2016). Revision of General Authorisations in terms of Section 39 of the National Water Act. Pretoria: Government Notice. Department of Water and Forestry. (2004). Crocodile River (West) and Marico Water Management Area: Internal Strategic Perspective of the Crocodile River (West) catchment. Pretoria: DWAF 03/000/00/0303. DWAF. (2004). -Gauteng Department of Agriculture and Rural Development. (2014). Technical Report Gauteng Conservation Plan Version 3.3 (C-Plan 3.3). Johannesburg: GDACE. GVM Inc. (2017). Updated Report for Roads and Services. Pretoria: GVM. GVM Inc. (2017). Updated Services Report for Water and Sanitation Report 1:10. Pretoria: GVM. GVM Incorporated. (November 2017). Updated Services Report for Water and Sanitation; Sub division on Portion 99 (A Portion of Portion 2) of the Farm Zwavelpoort 373-JR. Pretoria: GVM. Preez, C. d. (2018). Watercourse Rehabilitation and Management Plan as Part of the Water Use Authorisation Process for Two Low Water Bridges on Portion 99 of the Farm Zwavelpoort 373_JR in Pretoria East, Gauteng Province. Pretoria: Scientific Aquatic Services. SRK Consulting (SA) Pty Ltd. (2017). 518127 Portion 99 of the Farm Zwavelpoort 373_JR 1:50 Year and 1:100 Year Floodline Revioew and Flood Remedial Measures Report. Pretoria: SRK. Waste Water and Sewage Treatment Results. (2017, July 27). Retrieved from Lilliput Sewage Treatment Plants: http://www.lilliputsa.com/index.php/sewage-wastewater-treatment/output-results Water Institute of Southern Africa. (2017, July 18). Pienaars River: Topography, Geology and Soils. Retrieved from ewisa: http://www.ewisa.co.za/misc/RiverGAUPienaars/PIENAARSRiver_Geology%20.htm MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 64 Appendices MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 65 Appendix A: Project Master Plan MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 66 Appendix B: Power of Attorney, Letter of Confirmation and ID MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 67 Appendix C: Title Deeds and Membership Change MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 68 Appendix D: WU Licence and Registration Forms MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 69 Appendix E: Certification for essential services provided MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 70 Appendix F: Zwavelpoort Subdivision Layout MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 71 Appendix G: Design Drawings Low Water Bridge MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 72 Appendix H: Design Drawings Conservancy Tanks MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 73 Appendix I: As Built Drawing - Sewer lines MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 74 Appendix J: As Built Drawing – Potable Water MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 75 Appendix K: As Built Drawing – Roads MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 76 Appendix L: Floodlines MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 77 Appendix M: Stormwater Design MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 78 Appendix N: Rehabilitation Plan MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 79 Appendix O: Public Participation MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 80 Appendix P: Method Statement MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018 SRK Consulting: Project No: 498454 Baviaanspoort Pipeline WUA Page 81 SRK Report Distribution Record Report No. 498454 Copy No. 4 Name/Title Company Copy Date Authorised by DPW CD 1 HINM DWS PDF 2 HINM File SRK HC 3 HINM Library SRK HC 4 HINM Approval Signature: This report is protected by copyright vested in SRK (South Africa) Pty Ltd. It may not be reproduced or transmitted in any form or by any means whatsoever to any person without the written permission of the copyright holder, SRK. MAND/hinm 498454_20180831 R Baviaans Pipeline WUA_D_hinm August 2018