20230025_Gympie Tce Hotel SWMP

should be implemented on the development to ensure negative impacts to the downstream receiving environment
are mitigated. The erosion and sediment control strategy should be based on the following key principles:

     •    Minimise the disturbed area – The clearing of land should be limited to areas actively under construction or
          those that will be in the near future (3 to 6 months)

     •    Stabilised disturbed areas – Once an area is no longer actively under construction, the exposed surfaces are
          to be stabilised through means such as control matting, grass seeding or turfing. Both temporary and
          permanent stabilisation need to be considered.

     •    Protection of channels – where water is concentrated through channels, drains or other flow paths these
          areas should be stabilised (e.g. check dams to limit velocity, geotextiles to limit erosion, concrete lining, etc.)
          with either temporary or permanent solutions.

     •    Divert upstream flows – clean run-off from upstream areas is to be diverted around disturbed areas to prevent
          contamination of the clean water and minimise loss of exposed soils from the site. Catch drains, swales or
          sand bag berms may provide suitable diversion barriers.

     •    Maintenance – Regular inspections shall be carried out on all erosion and sediment controls, and where
          damage has been identified, or capacity of the device falls below 75%, prompt rectification of the defect
          shall be carried out to ensure the continued functioning of the controls.

As the area being developed exceeds 2,500m², the development’s construction will be required to achieve the
sediment control targets to treat 80% of the average annual run-off volume of the contributing catchment as outlined
of Appendix 2 of the SPP (DERM, July 2017), shown below in Figure 5-3.




                     Figure 5-3 SPP 2017 Construction Phase Stormwater Management Design Objectives

A site-specific erosion and sediment control plan shall be prepared as part of a future submission for Operational
Works approval for the development. Suitable erosion and sediment controls for the site may include:

     1. Provision of an on-site sedimentation basin to reduce sediment concentrations from site before being
        discharged into the downstream system.



Project number 20230025                                                                                   Page 12 of 22
File 20230025_Gympie Tce Hotel SWMP, 2023-05-31 Revision 0



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