Basic Assessment Report - Transnet

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Transnet LimitedProposed RO Plant: Port of SaldanhaFinal Basic Assessment Reportvarious commodity types at the time the plan was compiled. The location of the ROplant building can be accommodated in all three proposed locations.The infrastructure alternatives are “grouped” per site and discussed below.7.2.1 Site alternative 1 InfrastructureThe alternative intake and discharge infrastructure locations at this site include 12 :a) Beach well intake and pipeline discharge (Big Bay) (1a) (refer to figure inAppendix B2)b) Pipeline intake and pipeline discharge (Big Bay) (1b) (refer to figure inAppendix B3)c) Beach well intake and beach well discharge (Big Bay) (1c) (refer to figure inAppendix B4) [groundwater investigations have indicated that this alternativeis not feasible]Pipeline intake at this site (from Big Bay) will be a single point intake located in thesurf-zone or just beyond. Beach well intake at this site will require up to 10 beachwells at 50m spacing above the High Water Mark (HWM) along the beach. Apipeline discharge at this site (into Big Bay) will be below the sea surface along a30m length of the revetment of the reclamation dam at a location approximately 80mfrom the low water mark of the adjacent shoreline with an adjacent water depth ofapproximately 1.5m. Modelling conducted by a geohydrological specialist hasindicated that beach well discharge at this location is not viable as the soil profile inthe area where the beach wells are proposed will not allow sufficient quantities of thebrine to permeate, and thus the brine would overflow out of the beach wells.7.2.2 Site alternative 2 InfrastructureThe alternative intake and discharge infrastructure locations at this site include:a) Beach well intake and pipeline discharge (Small Bay) (2a) (refer to figure inAppendix B5)b) Pipeline intake and pipeline discharge (Small Bay) (2b) (refer to figure inAppendix B6)Pipeline intake at this site (Small Bay) will be a single point intake located up to 75moffshore. Beach well intake at this site will require up to 10 beach wells at 50mspacing above the High Water Mark (HWM) along the beach. Pipeline discharge atthis site (Small Bay) will be either a surf-zone discharge (most likely due to depth of12Note that all text in bold in brackets (including 1a, 1b, etc) refer to the specific site (number) and the specific layout (letter) ofeach alternative.29Prepared by the PDNA/SRK Joint Venture
Transnet LimitedProposed RO Plant: Port of SaldanhaFinal Basic Assessment Reportwater at this site) or a pipeline discharge through a single port diffuser in anapproximate -0.5 to-1m CD water depth.7.2.3 Site alternative 3 InfrastructureThe alternative intake and discharge infrastructure locations at this site include:a) Pipeline intake (Small Bay) and pipeline discharge (Small Bay) (3a) (refer tofigure in Appendix B7)b) Pipeline intake (Small Bay) and pipeline discharge (Big Bay) (3b) (refer tofigure in Appendix B8)c) Borehole intake on the quay (stockpiles) and pipeline discharge (caisson 3,Big Bay) (3c) (refer to figure in Appendix B9)d) Borehole intake on the quay (Multi-Purpose Terminal) and pipeline discharge(caisson 3, Big Bay) (3d) (refer to figure in Appendix B10)Pipeline intake at this site (Small Bay) will be along the quay wall adjacent to theMulti-Purpose Terminal (3a & 3b). Borehole intake at this site will require up to 6boreholes located on the causeway, either alongside the iron-ore stockpiles (3c) oralongside the Multi-Purpose Terminal (3d). Pipeline discharge into Small Bay (3a)will consist of a single port diffuser in an approximate -8m Chart Datum (CD) waterdepth. Pipeline discharge into Big Bay (3b) will consist of a single port diffuser in anapproximate -4m CD water depth. Pipeline discharge at Caisson 3 13 (3c & 3d) willconsist of a single port diffuser in an approximate -16 to -18m CD water depth.7.2.4 Alternative Reservoir LocationsThree alternative sites have been investigated for the location of the potable waterstorage reservoir(s), situated next to the existing potable water reservoir just north ofthe iron ore stockpiles (Preferred location - Appendix B11), next to the stockpiles andconveyors where iron ore is stockpiled (2 nd Preferred location – Appendix B12), andnorth-west of the iron ore handling facility outside of the immediate Port area onTNPA land (3 rd Preferred location – Appendix B13).The background to the determination of the various alternatives assessed (i.e. pre-EIAalternatives which informed the current alternatives) by the specialists and included inthis Basic Assessment is provided in Section 7.4 below.7.2.1 Preferred AlternativeThis application is for the RO Plant to be located south of the Multi-purpose terminal(at Site 3) with intake of seawater being via boreholes situated on the quay adjacent13Caisson 3 is the third caisson along the quay, from the land side (refer to Appendix B9 and B10).30Prepared by the PDNA/SRK Joint Venture
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Basic Assessment Report - Transnet

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