5179IWMP_Rev3

                                                                                  Callaghan & Toth


1.0 SUMMARY
This integrated water management plan (IWMP) has been prepared as part of a
Reconfiguration of a Lot application to Noosa Council for the proposed residential development
located at 2 Pearsons Road, Cooroy. The development includes:
    • Fifteen new residential lots;
    • New park – balance lot;
    • New road;
    • Easement for Access and Services;
    • Landscaping; and
    • Bioretention Systems in park and road reserve.

The key points of this investigation are as follows:
    1. Runoff from new roadways, footpaths and allotments is to be cleaned of nutrients and
       gross pollutants via a stormwater treatment system prior to being released to existing
       waterways.
    2. The stormwater treatment system includes:
                        a. One Bioretention Basin located in the new park, and
                        b. Four biopods in the road reserve.
    3. The increase in pollutant loads due to the increase in impervious areas is to be
       attenuated.
    4. Stormwater Detention is to achieve no increase in runoff concentration by the following
       measures:
                        a. Detention basin adjacent to the vegetated swale, and
                        b. Detention within the bioretention systems.




                                                                                                 5
2035 2 Pearsons Road IWMP – Revision 3                                            April 2021