This section considers flood behaviour resulting in potential detrimental increases in the potential flood affectation of the project infrastructure and other properties, assets and infrastructure.
Implementation of environmental management and pollution control facilities for the project.Īn assessment of construction impacts associated with water extraction, flooding and drainage is provided in the following sections.Realignment, modification or replacement of surface roads, bridges and underpasses.Construction and fitout of the motorway operations complexes and other ancillary operations buildings.Fitout of the road tunnels and support infrastructure, including ventilation and emergency response systems.Haulage of spoil generated during tunnelling and excavation activities.Construction of the road tunnels, interchanges, intersections and roadside infrastructure.Enabling and temporary works, including construction power, water supply, ancillary site establishment, demolition works, property adjustments and public transport modifications (if required).The construction activities associated with the project that could result in impacts if not mitigated include:
Underpass drainage channel manual#
In addition, flooding has the potential to impact on areas within and near construction sites for the project (ie potential inundation of project sites).Īn assessment of the flood risks to the project and the surrounding environment, along with development of appropriate mitigation measures, has been carried out in accordance with the Floodplain Development Manual (OEH 2005), the requirements of the previous WestConnex program of works environmental approvals and industry guidelines.Ĭonstruction of the project would involve a range of activities at sites of both permanent and temporary occupancy. 17.3 Assessment of potential construction impactsĬonstruction works have the potential to change flood behaviour and impact on the surrounding environment.
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