Marina Development

Location identified and mapped

Bathymetric and topographic survey

Multibeam or single-beam bathymetric survey of the basin, approach channel and breakwater alignment tied to land levelling datum and chart datum, seabed classification, existing SANHO chart extract, sub-bottom or seismic data where rock is suspected

Wave, tide, current and storm-surge study

Wave climate from CSIR WaveNet buoys and hindcast models, extreme-wave and sea-level-rise allowances, tidal and current measurements (ADCP), wave-penetration and basin-tranquillity modelling, design conditions for breakwaters and moorings

Sediment-transport, siltation and dredging assessment

Longshore and cross-shore sediment-transport modelling, shoreline-change analysis, capital dredging volume, expected annual siltation and maintenance-dredging regime, dredge-spoil characterisation against the National Action List, disposal options (beach nourishment, offshore site, land)

Coastal-engineering concept and layout

Concept design: breakwater alignment and type, entrance orientation, basin depth, berth count and mix, pontoons and piles, quay walls, slipway / boat hoist, dry stack, fuel berth, dredge plan, flushing / water-quality concept, phasing and concept cost (±35%)

Marine contractor appointed and construction compliance in place

Marine-works contract, construction work permit (Department of Employment and Labour) where thresholds are met, environmental control officer and EMPr monitoring, SAMSA / harbour-master notices to mariners, dredging and disposal monitoring under the dumping permit, building-plan approvals for landside buildings