EIS information guideline  Coastal
Coastal environment
The EIS should describe:
 storm tide inundation that may affect the site and at a minimum the 1% AEP or 100 year ARI level, including
mapping of the hazard areas at the site
 the erosion prone area declared for the site, including mapping of assets or operations within coastal hazard
areas
 how the development avoids or mitigates the risks on coastal hazards and how the development siting, design,
operation and storage of hazardous materials responds to these hazards to minimise risks to personal safety
and assets
 risks to people or coastal resources and how this is to be managed through evacuation or other means
 how the development directly, indirectly and cumulatively avoids an unacceptable increase in the severity of the
coastal hazard, and does not significantly increase the potential for damage on the premises or to other
premises
 how the development does not increase the risk of shoreline erosion for areas adjacent to the development
footprint
 any proposal for coastal protection works and their impacts.
Coastal resources and values
The EIS should describe:
 the existing coastal environment that may be affected by the project in the context of coastal resources and
values. When necessary to avoid duplication, cross-reference other sections of the EIS where coastal values,
such as ecology or scenic amenity, are addressed.
 natural processes affecting the site including tides and currents, sand transport, erosion and land building
processes and the protective function of landforms and vegetation
 location, volume and chemical and physical characteristics of any dredged material (sediments) to be removed
or relocated
 how the development maintains vegetation on coastal landforms where its removal or damage may otherwise:
o destabilise the area and increase the potential for erosion
o interrupt natural sediment trapping processes or dune or land building processes
 maintenance of sediment transport rates in and adjacent to the site
 maintenance of sediment volumes of dunes and near-shore coastal landforms, or where a reduction in sediment
volumes cannot be avoided, how increased risks to development from coastal erosion are mitigated by location,
design, construction and operating standards
 mitigation of the need for erosion control structures or riverbank hardening through location, design and
construction standards
 maintenance of physical coastal processes outside the development footprint for the development, including
longshore transport of sediment along the coast
 maintenance of or enhancement of coastal ecosystems and natural features, such as mangroves and coastal
wetlands, between the development and tidal waters, where the coastal ecosystems and natural features
protect or buffer communities and infrastructure from storm tide inundation
 maintenance of or enhancement of general public access to and along the foreshore
 disposal of any dredged material in tidal waters and how this is consistent with maintaining coastal resources
and their values
 beneficial reuse of any dredged or excavated material especially where this has a value in beach nourishment.
EIS information guideline  Coastal
Baseline data
Baseline data required may include:
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geological/geomorphological context
stratigraphy of the site
sediment size analysis and chemical description in the declared erosion prone area
site land levels
vegetation mapping
tides
waves
storm tides/historical water levels
historical shoreline changes.
Modelling
Modelling may be needed to identify:
 sediment transport processes, predictions of sediment transport rated and storm erosion potential both short
term and long term
 hydrodynamic processes onshore and off shore for storm tide inundation and off shore for sediment transport
including suspended sediments
 impacts of dredging or the disposal of dredged material especially dispersal of turbidity plumes.
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