2160 IWMP Report_Jan2022

                                                                                  Callaghan & Toth


Bioretention basin, bioswale and below ground roof water tank units are required for the site.
These devices will enable the water quality objectives to be achieved. Water reuse and water
use minimisation are in accordance with the guidelines. Two detention are required to
attenuate stormwater flows to predevelopment levels.

The Model for Urban Stormwater Improvement Conceptualization (MUSIC) has been used to
assess the suitability of various treatment devices and to model existing and predicted pollution
export loads and concentrations. HydroCAD has been used to assess the site stormwater
detention requirements.

The rainwater tanks have been sized in accordance with Water by Design Music Guidelines
Version 1, December 2010 for landscaping and the Queensland Development Code MP4.3 for
toilet use.


3.        DESCRIPTION
The site is bounded by Topaz Street to the north, Kauri Street road reserve (unformed road) to
the west, Cooroy Mountain Road to the east and vegetated property to the south. The use of
the site is an aged care facility, NoosaCare Kabara.

This site is subject to the ponding of floodwaters, with an unnamed tributary of Six Mile Creek
flowing along the southern boundary of the lot. This tributary flows to Lake MacDonald and is
within the Mary River catchment.

The flood search indicates that the Q100 year ARI flood levels do not impact on the habitable
floor levels of the buildings or carpark areas.


3.1       Proposed Works

It is proposed to demolish the existing Kauri building and construct a new building generally
within the same footprint of the existing building. The new building will result in the following:

         Proposed new building – increases the beds from 84 to 96 beds, an extra 12 beds.
         The new building will also have an extra 15 toilets, compared to the existing Kauri
          building.
         The roof area will increase by 544m2.

Features that won’t be impacted by these changes include:
    Carparking to remain the same,
    Access road to remain the same
    Footpaths to remain the same

As a result of these works stormwater drainage and treatment devices are required to drain the
site, attenuate flows and treat stormwater runoff to acceptable levels.

Plan 2160-01 shows the overall site layout. Plan 2160-02 and 2160-03 shows the treatment
and detention device locations.




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2160, Kabara Upgrade, Cooroy             IWMP.doc                               January 2022