RFI - 20220072 Ross Cr SWMP

 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 under gravity into the Council
          stormwater infrastructure on Ross Crescent as the lawful point of discharge.

     •    Field inlet pits are provided within the development to capture roof and surface run-off and convey it through
          the development. A basement sump and driveway drainage will drain to an in ground holding tank where
          it will be pumped to the internal drainage system to drain under gravity to the street.

     •    The existing and proposed development site have been modelled for the critical design storm events for the
          site, which identified that whilst there is an increase of peak flows from the developed site, the scale of the
          increase is acceptable and does not significantly alter the drainage characteristics – generally being a 2L/s
          increase in frequent and rare events. Therefore, no attenuation of peak flows is proposed for the
          development.

     •    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. An erosion and sediment control plan shall be developed as part of a submission for Operational
          Works approvals.

     •    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 20220072
File RECOR Preliminary Stormwater Management Report - 20220072.docx, 2022-09-02                                Page 11 of 14
Revision 1


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