DEEDI Approval to request to change and existing development approval · OPW11/0116

 NOTES

 1.       Design conditions
      1.1.    Tides [QT tide tables, Noosa Head]
                                AHD         LAT
                  HAT         +1.06m       +2.18m
                                                                                                                           Sand-filled Geotextile Containers
                  MHWS        +0.62m       +1.74m
                                                                                                                           Finished dimensions
                  AHD         +0.00m       +1.12m
                                                                                                                           [Filled above water level]
                  MLWS        -0.80m       +0.32m
                  LAT         -1.12m       +0.00m
      1.2.       Flood [Noosa River Flood Study, John Wilson & Partners, 1995]
                    50yr ARI           1.44mAHD                                                                                                                3.8m
                     entrance scour       0.5m
                                                                                                                             Nominal Diameter = 3.Om
      1.3.       Currents [GCCM numerical model]
                                                                                                                                                                      1.3m
                    Max spring tide    1 -1.5m/s.                                                                             Volume = 81 m3
                    Velocities expected to vary in response to prevailing channel configurations and location within
                    the estuary.
      1.4.       Waves
                    Hs                    1 m [nominal]                                                                                                        4m
                    Potential wave conditions at the foreshore are expected to vary in
                    response to prevailing channel configurations.                                                           Nominal Diameter = 3.4m
                                                                                                                                                                      1.5m
                                                                                                                              Volume =103m3
 2.      Materials - Geotextile and Sand-filled Geotextile Mega-Containers
      2.1.   Containers to be fabricated using ELCOMax 1209RP geotextile (or equivalent).            Expected lifetime
             25 years.
      2.2.       Container length to be 20m [may be altered if necessary or preferred by contractor].
      2.3.       Containers to have suitably spaced filling ports [MIN 3 preferred] with "screw & glue" closure types.                                         5m
      2.4.       Geotextile underlay to be ELCOMax 60OR (or equivalent)
      2.5.       Geotextile flaps, where required, are to be of sufficient size to provide a 30m x 6m flap. Flaps are to
                 be fabricated using ELCOMax 60OR (or equivalent). Flaps are to be adequately secured (e.g.                   Nominal Diameter = 4.2m
                 stiched) to the bottom of the container.                                                                     Volume =183m3                    T3        2.Om

      2.6.       If flaps cannot be fabricated, may be replaced with separate geotextile fabric with 1 m laps.

3.          Filling of Containers
      3.1.      Excavation tolerances                                                                                                                           6m
                    Vertical      +l- 0.2m
      3.2.      Containers to be filled in accordance with manufacturer's specifications using either jetpump, dredge
                or suitable alternative.
                                                                                                                              Nominal Diameter = 4.6m
      3.3.
      3.4.
                Design filled container dimensions as shown.
                Finished container tolerances                                                                                 Volume = 224m3                   T4            2,2m

                    Horizontal      +1.1.0m from design alignment [containers to be well butted together]
                    Vertical        +l- 0.5m at any single point
                                    +l 0.3m averaged over 10m

_t.         Maintenance
     4.1.       Nominated geotextile is more robust than the standard geotextile, however may be subject to                Sand-filled Geotextile Containers                                              *.I 1   rfu Lunv: Ar,..,


                damage from vandalism, vessel impact, anchors etc.                                                         Finished dimensions
                                                                                                                           [Filled below water level]           6m
     4.2.       Structures to be inspected periodically and after all major events.
     4.3.       Any minor damage is to be repaired as soon as practicable.
     4.4.       Any major damage or deflation and the container is to be replaced.
     4.5.       If damage is an ongoing concern, consideration may need to be given to armouring the structures
                                                                                                                              Nominal Diameter = 4.6m
                [e.g. with rock].                                                                                                                                            2.6m
     4.6.       Scour may require topping up with additional containers or placing of rock in scour holes

                                                                                                                                                                                                     International
5.      Monitoring
     5.1.       The natural system is highly variable. Monitoring is to be undertaken in accordance with ICM Report                                                                                  Coastal
                "Option Review - Noosa River Spit" to determine the performance and Impacts of the works.                                                                                            Management
     5.2.       Works may be modified or removed if monitoring indicates that this is necessary.                                                                                    '
                                                                                                                                                                                        ,i     mi SYC Males t$ WS:1, 4211,01D 'W,*
                                                                                                                                                                                        : S , 3u',MM'&wYIPo sah8-1,0.04 17 Arch

     5.3.       Implementation of later stages of the works to be undertaken as required.                                             Flap Detail

                                                                                                                                                                                         NOOSA RIVER SPIT


                                                                                                                                                                                                   NOTES


                                                                                                                                                                                            NHS-011                                  B