2015-10-13 Infrastructure & Services Committee Agenda

Page 22 of 25

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      Stormwater assets are the second highest                                     SS
      value asset owned by Council, however                                         See         See
      confidence in the knowledge of asset condition                         Sc
      is very low. These assets are predominately
      hidden and until there is an issue such as
      culvert failure, stormwater pipes flooding a                                                 .
      property or failure of an asset in a sensitive                                      ae              a
      environment, little is known of the risk they                     .            <n       ee
      pose.                                                                     “eas
      Physical condition assessments have
      commenced and renewal of these assets                       »   ~         an
      requires a prioritised programme.                                             =
      Total number of Assets = 22,830                                          -
      Total length of Stormwater drainage = 281km                   Age profile
      Current replacement cost = $ 149.5m                           The curpéntasset age profile highlighted in the
           ht roe oe oe = ; : era                  '               ‘graph below indicates that the assets lives vary
                epreciation costs = $ 2.4m       (                         :
      2014/15 Maintenance costs = $ 644k           '                ara       Soe ieaitlasheabernh leg
      2015/16 capital renewal program $ 550k                    i   identTg when major developments were
                                                                | %. undertaken in the 1990's, together with a large
      Critical assets — culverts that crosssroad                “Spike of assetsjin 2005 when there was a
      networks, stormwater pipes and! pits within road     ,      “proactive asset data collection programme
      carriageways, gross pollutant traps and bio                   underway.
      Rasliey Peenean eyateine                                      Assets that were added in 2005 have been
                                       =       .                | \, allocated an acquisition date for that year. This,
                                           .                      _ however, is not correct and will require further
      This first generation asset management plan              1  Bssessment to determine their approximate year
      provides an initial snapshot of Council's                  ’  of construction. Stormwater infrastructure is a
      stormwater assets. Through this plan, major risks             valuable asset class and will require greater
      and priorities will be identified through the                 investment in the validation and assessment of
      improvement of asset management practices. In                 data and assessment-activities.
      the future, the development of next generation                les disvahons   di      ;       tk     bodies tk
      asset management plans will provide far greater               Fh SEERA OT        NEN Overngy Oremees, ener eran 8
      detail.                                                       will be important to rectify the known
                                                                    deficiencies in data in order to have confidence
      Stormwater assets consist of pipes and                        in decision making processes.
      structures. Piped assets include culverts which
      are structures that are significantly larger in
      structure and are designed primarily for road
      crossings and structures include pits, manholes,
      field inlets / outlets, headwalls, gross pollutant                _
      traps and water sensitive urban design (WSUD                     a                                 .
      dovinee.                           oueenee                        S__      Asset Age Profile
                                                                        veo
                                                                        no
      Stormwater infrastructure is predominately                        < 520,000
      “hidden” until there is an issue with the                         =
      performance of the asset. These issues can                        5     aia         tubettll... oc ulin | il
      include pipe defects, blockages and lack of                      o         2  Se
      capacity within the local network. It is the flow on                          Ree eee RaSssa
      affects from these issues that cause sink holes in                            Baa Sa SaaS RRR
      roadways, localised flooding or excessive litter in                               Year Acquired
      our waterways.
Document Set ID: 19961828
Version: 5>-Version-Date:-04/4.0/2045

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