Hydraulic Assessment_compressed

              CONCLUSION

The pre and post development scenario for the subject and the external catchment hydrology has been
reviewed to ensure safe access can be achieved or refuge sought during flood events. Stormwater quantity
and quality from each of the proposed cabin locations has also been considered.


The following conclusions have been made:
     •    based on the proposed locations of the cabins, the areas proposed appear to be free of flood during
          the modelled storm events.
     •    Access to the cabins would be restricted during the design storm events modelled. Nonetheless so
          would access to the property based on the unpassable creek crossings on Eastern Branch Road.
          Therefore, access from the cabins to a point of refuge has been considered and can be achieved. This
          point of refuge would be the existing dwelling/managers residence at a higher elevation.
     •    Stormwater quality treatment can be achieved through rainwater harvesting tanks and buffer areas.
     •    The environmental footprint for the cabins would be minimal based on the areas already cleared and
          the tracks and culverts already in place.



In summary, the proposed cabin locations on the subject site will result in non-actionable nuisance of
stormwater runoff, be free of flooding and have safe refuge opportunities should it be faced with unpredicted
intermittent weather.


Yours Faithfully,




GLENN AINSWORTH
MIEAust CPEng NER RPEQ CPESC
BAX ENGINEERING PTY. LTD.
Ph: 0407 021 300




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    2261 david low way, peregian beach, qld 4573      acn: 626 671 092          [email protected]