16-001014-02A (Ultimate SCMMP)

                                                                                                                       Condition Maintenance
 What to look for                                        Performance Indicator (PI)^                                                                                                Additional Work Needed
                                                                                                                       Rating*   undertaken**
 SURROUNDS
 Damaged or removed structures                           No damage that poses a risk to public safety or
 (e.g. traffic bollards)                                 structural integrity
 INLET
                                                         Inlet is structurally sound and there is no
 Erosion
                                                         evidence of erosion or subsidence/settlement
 Damaged or Removed Structures                           No damage that poses a risk to public safety or
 (e.g. pit lids or grates)                               structural integrity

 Sediment, Litter or Debris                              No blockage

 BATTER SLOPES AND BASE INVERT
                                                         Minor erosion only that does not pose a risk to
 Erosion                                                 public safety or structural integrity and would
                                                         not worsen if left unattended
                                                         No surface depressions or mounds > 100mm
 Depressions or mounds

                                                         No isolated pools/depressions that could
 Isolated pools of water
                                                         provide mosquito habitat

 Litter                                                  Maximum 1 piece of litter per 4m2

 Unusual Odours, Colours or Substances
                                                         None detected
 (e.g. oil and grease)

 Accumulated Sediment1                                   No visible coarse sediment accumulated




*1 – PI met; 2 – PI met after maintenance activity; 3 – Additional maintenance needed; 4 – Rectification may be needed; NI – not inspected; NA – not applicable
**Quantify where possible e.g. amount of sediment or litter removed
1
 Monitor the rate of accumulation by checking sediment levels at least once per year. This may involve establishing one or more reference points within different zones of the WQCP. Where sediment depths are greater than
150mm, a bathymetric survey of the WQCP may be required to determine the full extent of accumulation
2
 Appendix B of WBD’s Maintaining Vegetated Stormwater Assets (2012) provides details of common weed species. Both declared and environmental/nuisance weeds are incorporated into this list
3
 Application of fertiliser in upstream catchment to be scheduled and measured to maximise nutrient uptake by plants and avoid runoff to WQCP.
^Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Changes are to be made where appropriate.