Attachment G - Stormwater Quality Management plan

                                                                                 Callaghan & Toth



4.3      External Catchment Management
The upstream catchment flowing into the proposed playground site encompasses part of the
library site and Maple Street road reserve and stormwater catchment up to the intersection with
Garnet Street. It is estimated that approximately a 1.8 hectare area of road reserve and
Commercial areas flows into the southern end of the playground site and this stormwater will
flow through the Frog Pond Precinct of the playground.

Council should consider a treatment system to treat litter, sediment and nutrients from this
upstream catchment to ensure that the water quality in the Frog Pond Precinct is suitable for the
proposed use i.e. primary contact.

There is an opportunity for Council to construct a biobasin within the area identified as
Catchment 7, (approximate surface area of 150m2 – this area would need to be determined
during detailed design) with an inlet GPT to treat this stormwater runoff in the road reserve of
Maple Street in the location shown below in Figure 4.2.




               Potential Biobasin site




FIGURE 4.2: Potential location for Stormwater Treatment System for external catchment




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2001 Hinterland Playground SWMP                                               February 2020