Reference Documents Plans - MCU24 0112 · MCU24/0112

                              Issue            Desired Outcomes



                                                  hydrological effectiveness) to 50mg/L Total Suspended Solids (TSS) or
                                                  less, and pH in the range (6.5–8.5).

                  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
                  flood flow management           stability 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 5 – 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




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Document Set ID: 23352733
Version: 1, Version Date: 15/11/2024