Judgment - Stockwell v Noosa Council - PEC Appeal 1998 of 2024 - 26.06.25 · MCU22/0094

6.5.4 Maintenance

For the Jellyfish filters, maintenance can be performed with a vacuum truck to remove captured soil,
sediment and floatables. Detailed maintenance techniques can be found in the OceanProtect
Operations and Maintenance Manual, attached in Appendix E.

For the initial maintenance of the bioretention basins, it is important to remove weeds and debris with
regular watering until plants are established and actively growing.

Watering is to be undertaken following the construction of the basin at the following frequency:
•    Week 1 – 6, 5 times/week
•    Week 6 – 10, 3 times/week
•    Week 11 – 15, 2 times/week

If there is no rain, each plant should receive 2.5 – 5.0 litres of water per week during establishment in the
first 6 weeks (40mm/week).

Watering requirements to sustain healthy vegetation should be determined during ongoing
maintenance visits.

Detailed establishment techniques can be found in the Water By Design Construction and Establishment
Guidelines.

Inspections are also recommended following large storm events to check for scour and other damage.

Maintenance of the bioretention basin will include:
•    Routine inspections of surface profile to identify areas of sediment build-up, scour and erosion or
     clogging of the filter media;
•    Routine inspection of the overflow pits and under drains for blockages and litter build-up;
•    Removal of sediment where it is smothering the basin vegetation; and
•    Repair all basin damage due to scour or erosion by replacement of filter media and vegetation.

A Bioretention Basin Maintenance Checklist is attached in Appendix D.

Detailed maintenance techniques can be found in the Water By Design Maintaining Vegetated Assets
Guideline.

6.6       Construction Phase (Sediment and Erosion Control)
6.6.1     Intent of Erosion and Sediment Control Management Plan

To prevent stormwater contamination (of watercourses) and the release of contaminated stormwater
and wastewater by ensuring compliance with the Environmental Protection Act 1994 and Environmental
Protection (Water) Policy 2009.




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Inspired engineering

10 April 2025
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