SPA Decision Notice - 010.2010.00000100.001 [As Published] · MCU11/0053

                                                                                         2010/100




Roof Water & Stormwater Drainage
29.   Roof runoff from any new dwelling shall be directed to a rainwater storage system or tank that
      is installed to ensure water from the rainwater storage system or tank is used for external uses
      (such as watering gardens, irrigation, ornamental ponds, water features, topping-up swimming
      pools, outdoor cleaning, etc) and for internal (ground floor) use in washing machine cold taps
      and toilet cisterns. All rainwater tanks are to be designed and installed in accordance with the
      Queensland Development Code (QDC) current at the time of building approval, and shall be
      part of the plumbing application for approval. The location and capacity of the tanks shall be
      clearly shown on the plans submitted for Building Works / Operational Works approval and
      any overflow shall be directed to the approved stormwater drainage system.
30.   All stormwater drainage (including roof water overflow from the rainwater storage system)
      shall be collected and discharged so there is no net increase in stormwater runoff from the
      site. Stormwater drainage permitted to drain from the site shall be discharged as overland
      flow at the rear of the site. Any stormwater discharged as overland flow must be collected and
      controlled within the site and discharged at pre-development overland flow rates (volume and
      velocity) without causing scour or damage to the subject site or any adjoining property. Plans
      of the drainage design shall be prepared by a Registered Professional Civil Engineer and
      submitted to Council prior to obtaining a Development Permit for Operational Works.
31.   All site stormwater drainage shall be by means of a gravity system.
Service Easements (Stormwater)
32.   A registered easement shall be created over any stormwater drainage pipes within the site
      that collect stormwater from a Council road or convey stormwater from any adjoining property
      (for example, where drainage pipes are provided within the site to prevent adjacent properties
      from additional ponding/flooding due to the subject site being filled).
33.   No building or other structure shall be constructed or encroach over an easement.
Earthworks
34.   Filling works required on site shall be carried out in accordance with Council’s Planning
      Scheme Policy PSP5 – Engineering Design Standards, so as not to cause the additional
      ponding of water on any adjoining lands or the blockage of, or interference with, any natural
      watercourses. Detailed site surveys indicating natural surface levels and contours of the
      adjoining properties must be provided with the application for a Development Permit for
      Operational Works for Filling and Drainage.
      This may require the design and construction of drainage pipes and/or an overland flow-path
      within the development site that caters for drainage from the adjoining sites for a design storm
      with an Average Recurrence Interval of 1 in 100 years. A private easement for the Drainage of
      Water encompassing the drainage pipes or overland flow-path will also be required. In this
      regard a Development Permit for Operational Works shall be obtained.
      Should evidence be provided to Council indicating that no additional ponding of stormwater
      will occur on the adjoining properties the requirement for the drainage pipes, overland flow-
      path and easement shall not apply.
35.   Earthworks carried out on site shall not affect the structural integrity of any of the existing
      fences or structures that border the development site. Fences that are affected shall be
      replaced prior to the Building Certifier issuing the Certificate of Classification. In this regard
      any fences to be replaced shall be clearly shown on the plans submitted for Operational
      Works approval.
Erosion and Sediment Control
36.   Any person acting on this permit shall prevent erosion and sediment export from leaving the
      site. Site control measures such as silt fencing, controlled gravel access to the site and
      controlled disposal of waste, will be necessary. In this regard plans detailing the methods of
      controlling erosion and sediment are required to be submitted to the Council for approval prior
      to obtaining a Development Permit for Operational Works.
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