RFI - Attachment 7 - Updated SWMP

Executive Summary
Colliers Engineering & Design has been commissioned by TOD Consulting Engineers to undertake a
preliminary stormwater assessment to support a development application (DA) for the construction of the
Arts Centre at Good Shepherd Lutheran College. The site is located within Noosa Shire Council described as
Lot 115 SP228052.

The proposed Stormwater Quality Management Strategy aligns with Noosa Shire Council’s Water Quality
and Drainage Code (Noosa Plan 2020) by addressing the ‘Stormwater quality and protection of receiving
waters’ objectives. To reduce the pollutant loads associated with the works, a bioretention basin with a filter
area of 55 m2, rain garden with filter area of 10 m2 and a rainwater tank with a re-use capacity of 15kL
designed in accordance with MUSIC modelling guidelines (2018) media are required.

The strategy also aligns with the Sustainable Building design Code by maximizing water efficiency within the
site. Roof water will be collected in an On-site underground rainwater tank and utilised within the new Arts
Centre building for toilet-use and irrigating the natural turf, overflow from the tank will be directed to the
bio-retention basin.

In summary, for Good Shepherd Lutheran College Arts Centre to be developed in accordance with Noosa
Shire’s (Noosa Plan (2020), following stormwater management strategies are required:

    •   Stormwater Quality Management:
        −    Half of the roof water will be directed to a combined rainwater tank which has a re-use capacity of
             15kL and will be used internally (Arts Centre Building) for toilet flushing and irrigation around the
             premise, the remainder will be directed through raingardens of 10m2 before being discharged.
        −    Runoff from the surrounding ground and carpark will drain directly to the bioretention basin.
        −    One bioretention with 55m2 of filter media area is required to meet water quality objectives.




21-0211SMP01V1 | Stormwater Management Plan | Good Shepherd Lutheran College Arts Centre