SUPERSEDED - Compiled Reference Document - RAL25 0011 (As Published)

  LINDSAY CONSULTING PTY LTD
  STRUCTURAL AND CIVIL ENGINEERS
  ACN 079 744 808 ABN 61 478 386 385 GST REGISTERED

  AS TRUSTEE FOR THE LINDSAY FAMILY TRUST




                  Issue                      Desired Outcomes

   Litter, Hydrocarbons and                   1. Remove gross pollutants and litter.
   other contaminants                         2. Avoid the release of oil or visible sheen to released waters.
                                              3. Dispose of waste containing contaminants at authorised facilities.
   Waterway Stability and                     1. Where measures are required to meet post-construction waterway stability
   flood flow management                              objectives, these are either installed prior to land disturbance and are
                                                      integrated with erosion and sediment controls, or equivalent alternative
                                                      measures are implemented during construction.
                                              2. Earthworks and the implementation of erosion and sediment controls are
                                                      undertaken in ways which ensure flooding characteristics (including
                                                      stormwater quantity characteristics) external to the development site are not
                                                      worsened during construction for all events up to and including the 1 in 100 year
                                                      ARI (1% AEP).




 Table 3 – SPP Appendix 2: Part 2 Construction Phase – Stormwater Management Design Objectives
 for Temporary Drainage Works

Temporary Drainage Works                                             Anticipated Operation Design Life and Minimum
                                                                                  Design Storm Event


                                                                     <12 Months            12-24 Months           >24 Months

Drainage Structure                                                   1 in 2 year            1 in 5 year           1 in 10 year
                                                                    ARI/39% AEP            ARI/18% AEP           ARI/10% AEP


Where located immediately up-slope of an                                           1 in 10 year ARI/10% AEP
occupied property that would be adversely
affected by the failure or overtopping of the
structure


Culvert Crossing                                                                    1 in 1 year ARI/63% AEP




 Off. 2C/82 Parker St, Maroochydore 4558
 OFFICE: (07) 54 792 118 MOBILE: 0412 313 645 FAX: (07) 54 510 118
 E-MAIL: [email protected]                                                                                    4