2017-01-19 Ordinary Meeting Agenda

ORDINARY MEETING AGENDA                                                    19 JANUARY 2017


              Stormwater Drainage
        27.   The site must be provided with a stormwater drainage system connecting to a
              lawful point of discharge. The works must be undertaken in accordance with an
              Operational Works approval and the Queensland Urban Drainage Manual, and
              must include in particular:
              a.   No adverse impact on other properties and the road’s footpath and grassed
                   verge (e.g. by diverting flows and/or blocking flows and causing additional
                   ponding)
              b.   The use of gravity stormwater drainage only and not surcharge pits or
                   pumps.
              c.   collection and discharge of stormwater to Taylor Court.
              d.   A stormwater detention system to manage peak flows for all storms up to
                   and including 1 in 100 years storm event
              e.   A stormwater quality treatment system. The stormwater treatment must
                   generally be in accordance with the Stormwater Management Plan For
                   Highway Service Centre Cooroy, project number 161968 by Covey
                   Associates, dated October 2016 except where alteration to impervious area
                   and water quality treatment dimensions are necessary to achieve the
                   following objectives as predicted in MUSIC modelling in accordance with
                   the Water by Design MUSIC modelling guidelines.

                                    State     Planning Environmental        Approved Plan of
                                    Policy             Protection    Water Development Water
                                                       Policy Water Quality Quality Criteria
                                                       Objectives

                    Total           90%         reduction <6mg/L               90th%ile 15mg/L
                    Suspended       compared      to   an
                    Solids          unmitigated
                                    development

                    Total           60%         reduction Maximum 50ug/L       Maximum 0.03mg/L
                    Phosphorous     compared      to   an
                                    unmitigated
                                    development

                    Total Nitrogen 45%         reduction Maximum 500 ug/L      Maximum 0.3mg/L
                                   compared      to   an
                                   unmitigated
                                   development

              f.   The development must include bins with educational signage material to
                   encourage patrons who purchase items that generate gross pollutants to
                   dispose of such items appropriately, and not where they may enter
                   stormwater systems.
              g.   Stormwater quality treatment devices must be routinely checked, serviced
                   and cleaned in accordance with the manufacturer’s recommendations or
                   Water by Design maintaining vegetated stormwater assets guidelines.
                   Records of all maintenance activities undertaken must be kept and made
                   available to Council upon request. Where replacement cartridges or other
                   necessary components for the system become unavailable, an alternative
                   system is required to be retrofitted into the development to achieve an
                   equivalent pollutant reduction outcome.


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