Attachment C - Stormwater Mangement Plan

8.0    ADDITIONAL DRAINAGE INFORMATION:
The drainage plan includes the following information:


1.0 Total catchment area.

2.0 Existing drainage services.

3.0 Layout of proposed drainage systems.

4.0 Natural surface contour lines to the AHD.

       1.0 Total catchment area
       The total catchment area for Lot2 is 1.6ha.

       2.0 Existing drainage services
       As shown in Appendix A: Site Locality Plan, the only drainage services currently
       provided are 2 vegetated North-South swales that are located close to the
       boundary on the East and West of Lot 2.
       These swales act to cut off any water external to Lot 2 from entering the Lot
       and the flows collected are directed to a non-formed drainage path within the
       Body Corporate land in Lot 0 to the South of Lot 2.

       3.0 Layout of proposed drainage systems
       Following the construction of the total number of dwellings (Caretakers
       Residence plus 18 Glamping Tents and associated roofed infrastructure such
       as BBQ facility on Lot 2, this will require harvesting of roof water into shared
       rainwater tanks to provide the potable water supply for each dwelling. This
       harvesting activity will also perform a stormwater detention function. Once the
       tanks are full, such as during a sustained rainfall event, the overflow from the
       tanks will discharge into a vegetated stormwater infiltration and level spreader
       swale which will be installed generally between 2 constructed Glamping Tents.
       These swales will provide irrigation to the vegetation and any excess water
       which does not soak into the sandy loam soil during the larger or longer rainfall
       events will overflow the swale and resume sheet/overland flow, similar to what
       occurs pre-development.
       It is contended that the construction of the approved dwellings (including other
       approved buildings) and the associated water harvesting and stormwater
       overflow arrangements described above will in fact result in a "Non-Worsening"


 Revision: B – 2nd August 2021
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