Objectives Target Outcome Other Relevant Considerations Objective 1: Flood Flow - Works Structures should be located away Open structures, such as or structures must not affect from active flow areas. carports, need only meet site floodwater flow capacity Causeways / access ways must not safety and site access Objective 2: Flood Storage - requirements. prejudice flood flow or storage Works or structures must not requirements reduce floodwater storage capacity TGM Assessment / The site contains a significant area above the 1% AEP flood extent which Comments through planning controls could be used for set aside areas for structures / buildings. Access to the area above the 1% AEP would be provided by a constructed causeways / access way that would be free draining underneath. Any loss of flood storage capacity could be provided elsewhere on the allotment. Objective 3: Site Safety - Locate away from active flow areas. Driveways and roads can be Development must not be Access ways should be no lower than used as overland flow paths as allowed where the resultant 100-year flood level. long as basic safety depth and flow of floodwaters Entrance requirements for requirements are met. would create a hazard underground car parks Consideration should be given Objective 4: Site Access - Access to basements (e.g. car parks) to guideposts along potentially Development must not be must meet site safety requirements submerged causeways. allowed where the depth and and include an entry / exit route that Mechanical mechanisms flow of floodwaters would make incorporates a continuous apex that is aimed at preventing inundation access or egress hazardous a minimum of 300mm above the 100- of basement car parks may be year flood level. considered provided such The area between a garage and / or mechanisms are supported by carport and a main building must meet a Flood Response Plan that site and access safety requirements. includes a routine test and No garage, only open sided buildings fault fix maintenance schedule and small garden sheds at natural but only after the applicant has surface if land above 100-year flood explored all other alternatives level not available. and these have been fully documented and documented and costed to the satisfaction of the Authority. TGM Assessment / If the access way is provided along the Comments northern side of the proposed southern lot, this is not in an active flow area, whilst the entry point to Forest Road is in an area shown as subject to flooding, again it is not in the active flow area and the depth is minimal.
Objectives Target Outcome Other Relevant Considerations Objective 1: Flood Flow - Works or structures must not affect floodwater flow capacity Objective 2: Flood Storage - Works or structures must not reduce floodwater storage capacity Structures should be located away from active flow areas. Causeways / access ways must not prejudice flood flow or storage requirements Open structures, such as carports, need only meet site safety and site access requirements. TGM Assessment / Comments The site contains a significant area above the 1% AEP flood extent which through planning controls could be used for set aside areas for structures / buildings. Access to the area above the 1% AEP would be provided by a constructed causeways / access way that would be free draining underneath. Any loss of flood storage capacity could be provided elsewhere on the allotment. Objective 3: Site Safety - Development must not be allowed where the resultant depth and flow of floodwaters would create a hazard Objective 4: Site Access - Development must not be allowed where the depth and flow of floodwaters would make access or egress hazardous Locate away from active flow areas. Access ways should be no lower than 100-year flood level. Entrance requirements for underground car parks Access to basements (e.g. car parks) must meet site safety requirements and include an entry / exit route that incorporates a continuous apex that is a minimum of 300mm above the 100- year flood level. The area between a garage and / or carport and a main building must meet site and access safety requirements. No garage, only open sided buildings and small garden sheds at natural surface if land above 100-year flood level not available. Driveways and roads can be used as overland flow paths as long as basic safety requirements are met. Consideration should be given to guideposts along potentially submerged causeways. Mechanical mechanisms aimed at preventing inundation of basement car parks may be considered provided such mechanisms are supported by a Flood Response Plan that includes a routine test and fault fix maintenance schedule but only after the applicant has explored all other alternatives and these have been fully documented and documented and costed to the satisfaction of the Authority. TGM Assessment / Comments If the access way is provided along the northern side of the proposed southern lot, this is not in an active flow area, whilst the entry point to Forest Road is in an area shown as subject to flooding, again it is not in the active flow area and the depth is minimal.