Services Scheme Report
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CIVIL ENGINEERING SERVICES REPORT FOR (WATER & SANITATION) TOWNSHIP TO BE ESTABLISHED ON PORTION 137 (A PORTION OF THE REMAINING EXTENT) OF THE FARM WATERKLOOF NO. 378-JR ERASMUS PARK EXT 3 – 6 AS PHASE 2 Prepared by: Developer and Applicant DG Consulting Engineers (Pty) Ltd Atterbury Property Fund Managers (Pty) Ltd P O Box 76294 Postnet Suite 205 Lynnwood Ridge Garsfontein 0040 0042 DG Corner Die Klubhuis 2nd floor No 9 Hibiscus street C/O 18 th street & Pinaster Lynnwood Ridge Hazelwood Pretoria Pretoria Tel: (012) 369-6720 Tel: (012) 471-1600 Fax: (012) 348-9978 Fax: (012) 471-1666 Boshoff Taljaard Gerhard vd Westhuizen [email protected] [email protected] JH Gelderblom Pr Eng No: 910375 Prepared for: The Engineering Departments City of Tshwane Metropolitan Feb 2019 Municipality 1154q.169 rev3 PORTION 137 (A PORTION OF THE REMAINING EXTENT) OF THE FARM WATERKLOOF NO. 378-JR ERASMUS PARK EXT 3 – 6 AS PHASE 2 CONTENTS PAGE 1. INTRODUCTION 1 2. GENERAL INFORMATION 1 2.1 Locality 1 2.2 Land use 1 2.3 Registered Owner 1 2.4 Deeds report 1 2.5 Rezoning application 1 2.6 Geology and topography 1 3. PROVISION OF WATER 2 3.1 Existing water reticulation 2 3.2 Proposed new infrastructure 2 3.3 Water demand 3 3.4 Materials and construction 3 3.5 Servitudes required 3 3.6 Construction cost for water 3 3.7 Contributions for water 3 4. PROVISION OF SEWER 4 4.1 Existing sewer reticulation 4 4.2 Proposed new infrastructure 4 4.3 Sewer demand 4 4.4 Materials and construction 4 4.5 Servitudes required 4 4.6 Contributions for sewer 5 ANNEXURE A: LOCALITY PLAN ANNEXURE B: APPROVED TOWNSHIP CONDITIONS ANNEXURE C: DRAWINGS ANNEXURE D: TITLE DEED ANNEXURE E: GLS REPORT 1 1. INTRODUCTION The developer and applicant has appointed DG Consulting Engineers (Pty) Ltd to compile a Services Report for the proposed development, as required by the City of Tshwane Metropolitan Municipality (herein after referred to as “Tshwane”). The purpose of this report is, firstly to confirm the availability and capacity of services, and secondly to enable the local authority to determine the cost for the provision of civil engineering services, as well as to finalize the township establishment application, guarantee amounts and contributions. 2. GENERAL INFORMATION 2.1 Locality The site under consideration, hereinafter referred to as “the township”, comprises of PORTION 137 (A PORTION OF THE REMAINING EXTENT) OF THE FARM WATERKLOOF NO. 378-JR. The local authority is City of Tshwane Metropolitan Municipality. Refer to Annexure A for a locality plan. 2.2 Land uses The land use is as indicated in the attached Annexure B. 2.3 Registered Owner Refer to the front page of the report. 2.4 Deeds report Refer to Annexure B for proof of ownership. 2.5 Township application Refer to Annexure B. 2.6 Geology and topography The geotechnical report and investigation was done by Verdicon Consulting Engineers. Refer to Annexure F. 2 3. PROVISION OF WATER 3.1 Existing water reticulation A 280Ø water pipeline will be installed during construction of Phase 1. This pipeline is situated on the western boundary of Phase 2 of the development, in Andalucia Ave, and Koedoesnek. The No other infrastructure is available close to the proposed development. 3.2 Proposed new infrastructure A new 250Ø water pipeline will be constructed up to the aforementioned 280Ø water pipeline of Phase 1 to accommodate the proposed development on Phase 2. The pipeline will be installed as part of internal link services and runs south to the eastern boundary of the Phase 2, next to the N1 freeway. The more important design criteria are: Annual average daily water demand as per revised Tshwane specification Maximum water flow velocity (domestic instantaneous peak flow) 0,1 m/s Maximum water flow velocity (domestic instantaneous peak flow plus (fire demand) 1,6 m/s Hydrant flow 50 l/s (15 m pressure) Fire risk category Moderate No booster connection with non-return required No PRV’s required 3.3 Water demand for this development Water demand figures are based on the revised Tshwane specifications. Extension 3: Erf 1 Business 3: 49 908m² x 0.6 FAR = 29 945m² = 29 945m² @ 1.2kl/100m² = 359 kl/day Erf 2 Business 4: 13 608m² x 0.6 FAR = 8 165m² = 8 165m² @ 1.2kl/100m² = 98 kl/day Extension 4: Erf 1 Business 3: 30 100m² x 0.6 FAR = 18 060m² = 18 060m² @ 1.2kl/100m² = 216.7 kl/day Erf 2 Business 3: 54 300m² x 0.6 FAR = 32 580m² = 32 580m² @ 1.2kl/100m² = 390.9kl/day 3 Extension 5: Erf 1 Business 3: 9 900m² x 0.6 FAR = 5940m² = 5940m² @ 1.2kl/100m² = 71.3 kl/day Erf 2 Residential 4: 39 200m² x 90 U/ha Res 4 (350 Units) = 350 Units @ 1.2kl/Unit = 420kl/day Extension 6: Erf 1 Residential 4: 62 828m² x 99 U/ha Res 4 (622 Units) = 622 Units @ 1.2kl/Unit = 746.4kl/day Erf 2 Public Open Space Total demand for Ext 3 – 6: Water demand = 2302.3 kl/day = 2302.3 kl x 1000/24 x 3600 = 26.6 l/s x 4.0 (Peak factor) = 106.61 l/s Fire flow = 50 l/s 3.4 Materials and construction It is proposed that the materials, construction and testing of the water reticulation comply with all relevant SANS 1200 series of specifications. The more important materials may be summarized as follows: Pipe - uPVC Ultratuff Class 12 Bends - uPVC Superflo Fitting: - Cast-iron Valves - Class 16 gate valve SABS 664, non rising spindle, anti clockwise closing 3.5 Servitudes required No new servitudes will be required. 3.6 Construction cost for water 3.6.1 Estimated construction cost of water pipeline ring main from existing 280Ø pipeline: Estimated construction cost 250Ø pipe (±1100m) R2 300 000.00 Preliminary and general R 200 000.00 Contingencies R 150 000.00 Professional fees R 260 000.00 Subtotal A R2 910 000.00 15 % VAT R 436 500.00 Total R3 346 500.00 4 3.7 Contributions for water 3.7.1 Bulk service contributions The estimated bulk service contribution will be as follow: Bulk contribution rate: = R 4 172.74/kl/day = R 4 172.74 x 2302.3kl/day = R9 606 899.30 4. SEWAGE RETICULATION 4.1 Existing sewer reticulation There is an existing 300Ø outfall sewer pipeline available on the higher laying area of the proposed development. Aforementioned sewer pipeline is situated inside the 1:50year and 1:100year flood lines. Tshwane have confirmed that sufficient capacities are available. No other infrastructure is available close to the proposed development. 4.2 Proposed new infrastructure The GLS report confirmed that the drainage area falls under the Apies river drainage area, and drains to the Daspoort WWTP. No upgrades will be required as enough capacities are available in the network. A new sewer connection will be required from the existing 300Ø sewer pipeline to the proposed development. This cost will be for the developer. 4.3 Indicative sewage flow calculations Sewer discharge figures are based on the design criteria for the waterborne sanitation system “General residential” development as per the “Guidelines for the provision of Engineering services and amenities in residential township development”. Extension 3: Erf 1 Business 3: 49 908m² x 0.6 FAR = 29 945m² = 29 945m² @ 1.2kl/100m² = 359 kl/day Erf 2 Business 4: 13 608m² x 0.6 FAR = 8 165m² = 8 165m² @ 1.2kl/100m² = 98 kl/day Extension 4: Erf 1 Business 3: 30 100m² x 0.6 FAR = 18 060m² = 18 060m² @ 1.2kl/100m² = 216.7 kl/day Erf 2 Business 3: 54 300m² x 0.6 FAR = 32 580m² = 32 580m² @ 1.2kl/100m² = 390.9kl/day 5 Extension 5: Erf 1 Business 3: 9 900m² x 0.6 FAR = 5940m² = 5940m² @ 1.2kl/100m² = 71.3 kl/day Erf 2 Residential 4: 39 200m² x 90 U/ha Res 4 (350 Units) = 350 Units @ 1.2kl/Unit = 420kl/day Extension 6: Erf 1 Residential 4: 62 828m² x 99 U/ha Res 4 (622 Units) = 622 Units @ 1.2kl/Unit = 746.4kl/day Erf 2 Public Open Space Total demand for Ext 3 – 6: Sewer discharge = 2302.3 kl/day = 2302.3 kl x 1000/24 x 3600 = 26.6 l/s x 4.0 (Peak factor) = 66.51 l/s 4.4 Materials and construction It is proposed that the materials, construction and testing of the sewer reticulation comply with all relevant SANS 1200 series of specifications. The more important materials may be summarized as follows: Sewer pipes and fittings to be uPVC (Mainlite) (SABS 559). Manholes are 1 000 mm internal diameter, precast concrete manholes, constructed of dolomite aggregate (SABS 1294), with step irons (BS 1247). Type 2A (SABS 558) manhole covers will be use for carriageways and Type 4 (SABS 558) for servitudes. 4.5 Servitudes required New servitudes will be required for the proposed development. The SG Diagrams will be submitted with the completion of the township. 4.6 Construction cost for sewer 4.7.1 Estimated construction cost of sewer network from existing 300Ø outfall line: Estimated construction cost 250Ø pipe (±1530m) R2 400 000.00 Preliminary and general R 250 000.00 Contingencies R 200 000.00 Professional fees R 280 000.00 Subtotal A R3 130 000.00 15 % VAT R 469 500.00 Total R3 599 500.00 6 4.7 Bulk services contributions 4.7.1 Bulk service contributions The estimated bulk service contribution will be as follow: Bulk contribution rate: = R 9 563.40/kl/day = R 9 563.40 x 2302.3 kl/day = R22 017 815.82 ANNEXURE A LOCALITY PLAN ANNEXURE B TOWNSHIP CONDITIONS ANNEXURE C DRAWINGS ANNEXURE D TITLE DEED ANNEXURE E GLS REPORT .