Stormwater Management Plan -OPW (A) · OPW25/0042

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.