MCU25 0079 - Negotiated Reference Documents (As Published)

                              Issue            Desired Outcomes



                                               3. Prior to completion of works for the development, and prior to removal
                                                  of sediment controls, all site surfaces must be effectively stabilised
                                                  using methods which will achieve effective short-term stabilisation.

                  Sediment Control             1. Direct runoff from exposed site soils to sediment controls that are
                                                  appropriate to the extent of disturbance and level of erosion risk.
                                               2. All exposed areas greater than 2500 metres must be provided with
                                                  sediment controls which are designed, implemented and maintained
                                                  to a standard which would achieve at least 80% of the average annual
                                                  runoff volume of the contributing catchment treated (i.e. 80%
                                                  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 6 – 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: 23959990
Version: 1, Version Date: 23/07/2025