Appendix B - IWMP_2PearsonsRd_REV0

                                                                               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 residential development located at
2 Pearsons Road, Cooroy. The development includes:
    Eighteen new residential lots;
    New park – balance lot
    New road;
    Easement for Access and Services;
    Landscaping; and
    Bioretention/Detention Basin in park.

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.
   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 storage in Bioretention Basin; and
                   b. 47m3 EcoAid underground storage facility.




                                                                                                5
2035 2 Pearsons Road IWMP                                                  September 2020