Compiled Approved Plans OPW25/0042.02

                 STORMWATER MANAGEMENT DEVICES - MAINTENANCE PLAN

                  ELEMENT:             MAINTENANCE OF RAPID INFILTRATION PITS (RIPs)/RAPID INFILTRATION
                                       CULVERT (RIC) & SUROUNDING BIORETENTION

                  1.         Objective                    To ensure ongoing function of RIP’s/RIC             in
                                                          infiltrating stormwater into the subsoil.

                                                          To ensure ongoing function of bioretention in
                                                          treating stormwater prior to infiltration.


                  2.         Management Strategy          Bioretention basin surface and RIP/RIC base to
                                                          remain free of ponded water, debris, silt and
                                                          sediment build-ups.

                                                          Bioretention basin vegetation to remain healthy
                                                          and vigorous.

                  3.         Actions                      Maintenance contractor to inspect and service
                                                          RIP’s/RIC and surrounding bioretention areas at 3-
                                                          monthly intervals.

                                                          Bioretention areas and base of RIP to be inspected
                                                          with any ponding of water noted.

                                                          Bioretention areas to be inspected with any
                                                          accumulated debris and silt to be removed as
                                                          required, plants to be trimmed, pruned, replaced
                                                          as required.

                                                          Geofabric filter at base of RIPs/RIC to be inspected
                                                          with accumulated debris and silt to be removed as
                                                          required.

                                                          If heavy silting and/or discolouration of geofabric
                                                          filter is evident geofabric filter to be replaced with
                                                          equivalent Bidim A14 material.

                                                          All removed sediment/silt to be placed in skips or
                                                          bins for disposal.

                                                          If ponding is not remedied by above actions,
                                                          contact engineer for further advice.




Document Set ID: 24143616
                  23646596
Version: 1, Version Date: 24/09/2025
                          21/03/2025