20220218 22 Grant SWMP · MCU22/0172

 CONCLUSION
This Stormwater Management Report has outlined how the stormwater run-off from the site is to be managed to
comply with the relevant requirements and minimise any adverse impacts to the downstream catchments.

     •    The proposed site surface run-off is captured internally and discharged into the Council stormwater
          infrastructure on Grant Street as the lawful point of discharge.

     •    An existing kerb inlet pit will be relocated downstream of the proposed driveway location and any existing
          drainage pipes will be reconnected into the new pit to maintain the existing drainage characteristics of the
          network.

     •    Field inlet pits are provided within the development to capture upstream run-off and provide connection
          points for roof drainage to convey it through the development.

     •    The existing and proposed development site have been modelled for the critical design storm events for the
          site, which found there is an insignificant increase in peak flows which is unlikely to result in significant
          impacts or nuisance to downstream drainage networks. No attenuation is therefore proposed for the site.

     •    During construction, erosion and sediment control measures are to be implemented to minimise potential
          contaminants impacting the downstream receiving environment in line with the objectives of Appendix 2 of
          the SPP.

     •    As the development is a small residential site that does not significantly alter the pollutant generating
          characteristics of the site, stormwater quality treatment is not proposed for the development.

     •    The proposed stormwater solution is considered to minimise any adverse impacts to the downstream
          environment arising from the stormwater run-off while also meeting the stormwater quality targets required
          for the development.




Project number 20220218                                                                                       Page 11 of 14
File 20220218 22 Grant SWMP.docx, 2022-09-15 Revision 1

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