2016-07-12 Planning & Environment Committee Agenda

PLANNING & ENVIRONMENT COMMITTEE MEETING AGENDA                                     12 JULY 2016


    59.   Buildings floor levels and bulk earthworks finish levels must take into consideration
          any building Minimum Floor Level required by the planning scheme at the time of
          construction.
    60.   Earthworks carried out on site must not adversely affect the drainage conditions on
          any other properties or existing roads, and/or the patterns and severity of flooding in
          the area particularly on downstream properties. Filling works required on site shall not
          cause 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 any potentially affected properties must be provided
          with any application for a Development Permit for Operational Works for earthworks
          and/or stormwater drainage works.
          This may require the design and construction of drainage pipes and/or an overland
          flow-path within the development site to cater for drainage from the adjoining sites for
          a 1% AEP design storm.
    Stormwater Drainage (Quantity & Quality)
    61.   A suitably qualified Registered Professional Engineer, specialising in hydraulics shall
          prepare engineering drawings and specifications for stormwater designs and shall be
          submitted in conjunction with an application for a Development Permit for Operational
          Works.
    62.   Stormwater pipelines within the site shall cater for 10% AEP storm event and
          secondary flow paths shall be provided within the site to cater for 1% AEP storm
          event.
    63.   The development must not adversely impact on the existing drainage conditions on
          other properties. The applicant must demonstrate that all stormwater runoffs from the
          fully developed site must be maintained at predevelopment rates for all storm events
          up and including 1% AEP storm event.
    64.   Stormwater runoff generated from the development must be treated to achieve the
          Water Quality Objectives as specified under Healthy Waterways Water Sensitive
          Urban Design – Technical Guidelines for South East Queensland (2006) as well as
          the State Planning Policy 2014 (SPP 2014) prior to release off site. For the purpose
          of this condition, treatment of waters from catchments B1 and C1 as shown on
          Drawing B14158.W-SK100 A by Calbre Consulting, dated 050/2/16 shall be
          considered as part of the development to determine mitigation requirements and load
          reduction targets.
          If detailed design demonstrates insufficient footprint is available for the water quality
          treatment devices to achieve the pollutant reduction targets of 80% reduction in Total
          Suspended Solids, 60% reduction in Total Phosphorous, and 45% reduction in Total
          Nitrogen compared to an unmitigated development, the applicant must increase
          available space to ensure the water quality objectives can be achieved.
    65.   Stormwater Quality Treatment must be designed in accordance with the Water by
          Design MUSIC modelling Guidelines. Any deviation away from the recommendations
          of the Water by Design guidelines may only be approved where:
          65.1. letters signed by the authors of the Water by Design MUSIC modelling
                guidelines and/or eWater MUSIC modelling program are provided to confirm
                that the modelled design is expected to meet the required water quality
                outcomes at the discharge point of the site; and




                                                                                   Page 84 of 185