MCU14/0056 - Attachment G - Engineering Report & Stormwater Management Plan

                             Cnr Myall Street & Ferrells Road Coorroy, QLD 4563
                                              State Planning Policy December 2013 - Healthy Waters (DERM)
                                                 Performance Outcome Criteria and Acceptable Outcomes


                  Performance outcomes                                Acceptable outcomes                                          Solution
                                                        the waterway and receiving waters, and
                                                        e. states required actions under the agreement
                                                        for maintaining the waterway to achieve the
                                                        outcomes of this code and any relevant
                                                        conditions of a development approval, and
                                                        f. identifies funding sources for the above,
                                                        including bonds, headworks charges or levies.




    Table A: Construction phase—stormwater management design objectives
    Application
    Applies to all climatic regions.


         Issue                                                                     Design Objectives
                           Temporary                     1. Design life and design storm for temporary drainage works:
Drainage Control
                           drainage                      • Disturbed area open for <12 months—1 in 2-year ARI event
                           works                         • Disturbed area open for 12–24 months—1 in 5-year ARI event
                                                         • Disturbed area open for > 24 months—1 in 10-year ARI event
                                                         2. Design capacity excludes minimum 150 mm freeboard
                                                         3. Temporary culvert crossing—minimum 1 in 1-year ARI hydraulic capacity
                           Erosion                       1. Minimise exposure of disturbed soils at any time
Erosion Control
                           control measures              2. Divert water run-off from undisturbed areas around disturbed areas
                                                         3. Determine the erosion risk rating using local rainfall erosivity, rainfall depth, soil-loss rate or
                                                         other acceptable methods
                                                         4. Implement erosion control methods corresponding to identified erosion risk rating
                           Sediment control              1. Determine appropriate sediment control measures using:
Sediment Control