Hawkesbury Flood Management Conditions

2. Approved Plans and Supporting Documentation The development must be carried out in accordance with the approved plans and supporting documentation listed below which have been endorsed by Council's approved stamp, except where amended in red on the plans and/or amended by other conditions of consent: a) Plans Reference: Drawing Drawing Description Prepared by Issue Date Ref. No. No. DA02 Overall Site Plan DTA Architects DA04 24/11/22 DA03 A-Site Plan DTA Architects DA01 26/05/22 DA04 B-Site Plan DTA Architects DA02 24/11/22 DA05 C-Site Plan DTA Architects DA02 24/11/22 DA07 Overall Demolition Plan DTA Architects DA02 24/11/22 DA08 A-Demolition Plan DTA Architects DA01 26/05/22 DA09…

In the event the 100 year ARI overland surcharge flow cannot be contained within the roadway the pipe may be designed for the 20 year ARI. Details demonstrating compliance with the above requirements must be submitted to the Certifier for approval prior to issue of a Subdivision Works Certificate. Stormwater – Overland Flow The development shall not create adverse impacts to neighbouring properties in relation to overland flow and must meet the following requirements: a) water flowing from the property must not be redirected or concentrated to adjoining properties; b) water flowing into the property from adjoining lots shall not be impeded or diverted; and c) water flow shall follow the…

92. Flood Prone Land - Engineers Certification The 100 year Average Recurrence Interval (ARI) flood level for this site is 17.3 RL metres AHD (Australian Height Datum). An engineer's certificate must be provided deeming compliance with the following requirements during a 100 year ARI flood event: a) Habitable Floor Levels: Habitable floor levels must be equal to or greater than the 100 year ARI Flood Level for new Yr 7-10 Inquiry Hub and new Yr 11-12 Inquiry Hub; b) Debris: Damage to the proposed structure/s sustained in a flood will not generate debris capable of causing damage to downstream buildings or property. This includes securing of utilities and equipment including tanks, A/C units…

38. Flood Prone Land - Engineers Certification The 100 year Average Recurrence Interval (ARI) flood level for this site is RL 17.3 metres AHD (Australian Height Datum). An engineer's certificate must be provided deeming compliance with the following requirements during a 100 year ARI flood event: a) Habitable Floor Levels: Habitable floor levels must be equal to or greater than the 100 year ARI Flood Level for new Yr 7-10 Inquiry Hub and new Yr 11-12 Inquiry Hub; b) Debris: Damage to the proposed structure/s sustained in a flood will not generate debris capable of causing damage to downstream buildings or property. This includes securing of utilities and equipment including tanks, A/C units…

Condition reason: To ensure suitable road layout provided and in compliance with relevant standards. 14 Stormwater quantity control – Design Requirements All provisions for stormwater quantity control must comply with the Section 2.2.6 of the Jacaranda Development Control Plan and Hawkesbury Development Control Plan, Appendix E: Civil Works Specification to avoid the incidence of flooding on the downstream drainage system and properties. Details demonstrating compliance with the above requirement are to be submitted to Council for all subdivision Development Applications. Condition reason: To ensure suitable stormwater drainage system provided and in compliance with relevant standards. 15…

Infrastructure) 2021 • Hawkesbury Local Environmental Plan 2012 (LEP 2012) • Draft environmental planning instruments: Nil • Development control plans: • Hawkesbury Development Control Plan 2002 (HDCP 2002) • Hawkesbury Council Flood Policy 2020 • Planning agreements: Nil • Relevant provisions of the Environmental Planning and Assessment Regulation 2021 • Coastal zone management plan: Nil • The likely impacts of the development, including environmental impacts on the natural and built environment and social and economic impacts in the locality • The suitability of the site for the development • Any submissions made in accordance with the Environmental Planning and Assessment Act 1979 or…

37. Flood Prone Land - Flood Compatible Construction All buildings must have flood compatible structural components up to and including the 100 year Average Recurrence Interval (ARI) flood level. The materials used in the construction must be consistent with any structural engineering certificate regarding the ability of the building/structure to withstand the forces of floodwater. A written specification of the proposed materials to be used must be provided to the Certifier prior to the issue of a Construction Certificate. Note: Advice on suitability of materials for use on flood liable land can be found in the publication 'Reducing Vulnerability of Buildings to Flood Damage' (Chapter 4.3…

87. Flood Prone Land - Awareness and Evacuation The following requirements are to be prepared and installed prior to the issue of any Occupation Certificate for the relevant stage: a) A flood emergency evacuation and management plan is to be prepared for the development. The plan must advise occupants of flood evacuation procedures and emergency telephone numbers. The evacuation procedures must be permanently fixed to the building in a prominent location and maintained at all times; and b) A flood warning sign is to be provided advising occupants that the site may be subject to inundation during times of flood. The sign must be constructed of durable material and installed in a prominent…

30. Earthworks - Staging The bulk excavation / cut and fill plan must be revised and be consistent with the approved architectural plans. Stage 1C is to be deleted. Earthworks must be carried in the following sequence to ensure that total flood storage volume within the development site is not reduced at any time throughout these works associated of the development. Sequence of earthworks : Stage 1B, 1A, then 2 as identified in the civil engineering plan. The staging plan, satisfying the above criteria, is to be submitted to the Certifier prior to issue of the Construction Certificate

29. Overland Flow The development must not create adverse impacts to neighbouring properties in relation to overland flow and must meet the following requirements: a) water flowing from the property must not be redirected or concentrated to adjoining properties; b) water flowing into the property from adjoining lots must not be impeded or diverted; and c) water flow must follow the natural flow directions without increasing velocity. Details demonstrating compliance with the above must be provided to the Certifier prior to the issue of a Construction Certificate.

98. Flooding – Emergency Management A flood emergency evacuation and management plan is to be prepared for the development. The Plan must advise occupants of flood evacuation procedures and emergency telephone numbers. The Plan must be updated every two years.