NOOSA PLAN 2020 PROPOSED AMENDMENT NO. 2 - POST PUBLIC NOTIFICATION FOR FINAL STATE GOVERNMENT MINISTERIAL APPROVAL · Attachment 1 Table of submissions

 Your Say    ECM         Submitter comments                                                                                             Response                                                                                                       Recommendation
 Reference   reference
                           Who wants to see that many more cars at the low density Dianella Court - Wilgee Court intersection or
                           at ANY OTHER CORNER IN TOWN?




                         Flooding and Drainage
                         • Dianella Court sits at the low side of 62 Lake Macdonald Drive, a sloping site thickly vegetated over half   The Kauri Street entrance to the cemetery is at the natural top of a hill with the land falling in most
                           of it's area. 62 Lake Macdonald Drive already releases an excessive amount of stormwater into the            directions from this point. A gully captures some of the overland flow and directs flows into a culvert then
                           Dianella Court residential area and mitigation work is needed. if 62 Lake Macdonald Drive were to be         runs beneath adjoining properties in a pipe system and eventually discharges on the western side of Lake
                           developed, all the vegetation would be removed (replaced by 2.7Ha approx. of roofs and hardstands)           Macdonald Drive.
                           and even more stormwater would be generated This increased stormwater load would pass either                 Between Dianella Court and Swift Drive there is a drainage reserve under the control of Council as trustee.
                           directly or indirectly to one point - the drainage system under the Dianella Court, Wilgee Court, Lake       This strip is subject to flood hazard and riparian values. There is a natural drainage line that also falls
                           Macdonald Drive intersection. It would then flow in drainage creeks through residential areas before         from Pear Tree Lane south of 27 Dianella Court.
                           ending up in Six Mile Creek. Many downstream areas already flood in heavy or sustained rain.
                                                                                                                                        Urban development, while increasing impervious surface and reducing absorption, is accompanied by
                         • This will add large amounts of storm water run off, off of concrete and roofs instead of soil and root       stormwater management plans which ensures that there is a non-worsening of stormwater at boundaries.
                           systems. The storm water drainage pathway behind our backyard turns into a rampant river every heavy         Stormwater management plans are designed by hydrological engineers who model rainfall data,
                           rainfall period that comes up to our first retaining wall (I have video evidence of this); this is without   catchment information and other assumptions and include measures such as pipe sizes, landscaping and
                           blockages and the extra stormwater created by this development meeting at the intersection of Dianella       retention basins to ensure a non-worsening.
                           Court and Lake MacDonald Drive.
                                                                                                                                        Sediment and erosion control measures are designed by civil engineers to mitigate sediment runoff from
                         • What has been done in regards to mitigating future flooding in the overflow creek given the run extra        the site prior unit development.
                           run off caused by land coverage. During heavy rain events, the road already floods at the intersection       In addition, unit development is also required to demonstrate a non-worsening at the new lot boundaries
                           of lake MacDonald and Dianella.                                                                              from the driveways, roof and overland flow. The stormwater is controlled by options such as roof size,
                         • You are removing the trees for stages 2 & 3 before starting stage one, what report has been done on          rainwater harvesting tanks, landscaping and pipe sizing.
                           the extra run off from the sloping hill towards the end of the cul-de-sac once the trees are removed? I
                           have video evidence of rapids forming in this area. You cannot make an existing situation worse with
                           a new development.
                         • Increased drainage/run-off associated with land clearing and development could potentially cause
                           flooding at the Dianella Ct, Lake Macdonald Drive intersection and along the drainage easement to
                           properties on the northeastern verge of Dianella Ct.
                         • The risk of flooding from water catchment to the lower areas.



                                                                                                                                         104
Table of Submissions made regarding Noosa Plan 2020 Proposed Amendment No. 2, 2024