2021-04-12 General Committee Meeting Minutes

GENERAL COMMITTEE MEETING MINUTES                                             12 APRIL 2021


                  Stormwater Quality
            46.   The development must include a stormwater quality treatment system
                  designed to achieve 80% reduction in Total Suspended Solids, 60%
                  reduction in Total Phosphorous, and 45% reduction in Total Nitrogen
                  compared to an unmitigated scenario, prior to discharge from the site.
            47.   The stormwater quality treatment system must be in accordance with an
                  Operational Works approval for stormwater drainage and, the Queensland
                  Urban Drainage Manual. The application for Operational Works Approval
                  must demonstrate that:
                  47.1. all runoff can be filtered via vegetated areas prior to discharge from
                        the site.
                  47.2. pollutant reduction predicted for the stormwater quality treatment
                        train is designed in accordance with the Water by Design MUSIC
                        modelling guidelines (Version 1) 2010.
                  47.3. Detail design plans for the stormwater treatment train, and submitted
                        for the Operational Works approval, demonstrate the size of water
                        quality improvement features are consistent with the MUSIC model,
                        and are visually integrated into the development in accordance with
                        the Water by Design Bio-retention Technical Design guidelines
                        (Version 1.1) October 2014.
                  47.4. Any necessary retaining walls within bio retention basins must not
                        exceed 0.8m in height. The operational works approval application
                        must detail proposed rock finishing on any retaining walls, and these
                        approved finishes shall be maintained for the life of the development.
                        Raw finished concrete block retaining walls will not be approved.
                  47.5. The application for operational works approval must include the
                        design for educational signage to be included within/alongside the
                        bio-retention basin. Signage must follow a green and white colour
                        pallet and state “This bio retention basin cleans stormwater runoff
                        prior to its discharge to The Noosa River”.
                  47.6. Stormwater detention must be included in the stormwater treatment
                        train design, and maintained to facilitate for stormwater flows
                        discharging from the development to be consistent with pre-
                        development characteristics.
                  47.7. Stormwater discharges are provided with a free draining outlet and
                        connect to a lawful point of discharge in accordance with PSP6
                        Engineering Design Standards - Roads, drainage and earthworks
            48.   All stormwater quality treatment devices must be maintained in accordance
                  with the Water by Design (2012) - Maintaining Vegetated Stormwater
                  Assets (Version 1). A copy of this document must be retained on the site
                  together with the approved Operational Works drawings for the stormwater
                  quality treatment system and a detailed life cycle costing of the system
                  attached as an addendum. Records of all maintenance activities
                  undertaken must be kept and made available to Council upon request.
            49.   Any proposed Community Management Statement required for the
                  development must include the Water by Design (2012) – Maintaining
                  Vegetated Stormwater Assets (Version 1) document and must include the
                  full cost of maintaining the system in accordance with that document.




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