16-001014-02A (Ultimate SCMMP)

 What to look for                             Performance Indicator (PI)                        Condition Maintenance                            Additional Work Needed
                                                                                                Rating*   undertaken**
 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

 Crust of Fine Sediment                       No surface crusting

                                              No surface depressions or mounds > 100mm
 Depressions or mounds

                                              Filter media is draining freely, whereby water
                                              is not ponded on the surface for more than 12
 Hydraulic Conductivity or Permeability       hours after rainfall and there is no obvious
                                              impermeable or clay‐like surface on the filter
                                              media**
                                              Clean out points not damaged and end caps
 Underdrainage/clean out points
                                              securely in place

 Litter                                       Maximum 1 piece of litter per 4m2

 Unusual Odours, Colours or Substances
                                              None detected
 (e.g. oil and grease)
                                              Minimum 95% vegetation cover (minimum
                                              bare batches)

 Vegetation                                   Plants healthy and free from disease

                                              Average plant height > 500mm

                                              Maximum 10% of surface covered in algae
 Algal or Moss Growth
                                              No Moss growth

*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
Maintenance details adopted from Water By Design’s Maintaining Vegetated Stormwater Assets – Version 1 (2012). Refer to this document for further details