2015-10-13 Infrastructure & Services Committee Agenda

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RISKS                                                                     Sie
                     . ag                                        Asset condition
     1.  Asset deterioration and structural failure;                                    :            ~
     2   Pp         tructi   techni         4 ined               The level of confidence in asset condition data for
           Sue Sone       Us UES, one          ieee              bridges is higher than most other asset classes due
        materials;                                               to the proactive level 1 and level 2 inspections.
     3.  Contributed assets not meeting the required             These are cyclical inspections which can escalate to
         levels of service or fit for purpose;                   a level 3 structural inspection should a level of
     4.  Disaster events such as flooding, storm.                defects be reached.
                                                                 While Council undertakes level 1 through to 3
                                                                 inspections these have not consistently recorded the
                                                                 individual overall asset condition score. Based on the
                                                                 below 1 to 5 rating for each bridge across the
                                                                 network, the current condition profile in the graph
                                                                 below is based on an aged base condition rather than
     Asset renewal                                               physical condition. The first improvement in condition
     Although the existing renewal activities are a              data is to record the 1 to 5 ratings of all bridges and
     result of asset failure and defect detection, the           record them.
     development of a renewal programme will                                                            E
     improve the capability of predicting suitable
     intervention timeframes.                                           [ETE   OTE
                                                                           1   Very Good Condition ;
     Currently there are four concrete bridges that                        -   Bier Cetce Date Ts a
     need rehabilitation or replacement over the next                          slisionadiea agai Xo teats —
     two to three years. The highest priority bridge of                    3   Level of Service    Ps     ,
     these four is Munna Point Bridge which is a                              Lapa
     concrete road bridge built in the late 1970's.                        Dp  ipeeatbevde tee beeen
     Poor construction techniques and inferior                             5  Raerineryicte se ae ex  oes
           ?                 ss     .           F                                       set requires replaceme: hs
    materials used for a marine environment bridge               The Physical Asset Condition is measured using the “core asset
     has seen this bridge and others reach end of life           management approach” based on a 1 - 5 scale from the IIMM,
     nearly 40 years early. This bridge is currently             International Edition 2011. This is a universal approach being used
     being rehabilitated. The remaining three bridges,           for the majonty of Council's infrastructure.
     Sheraton Bridge, Doonella Bridge and Witta
     Circuit Bridge, were all constructed in the same
     decade and are currently being investigated for
     potential defects and deterioration.                            5
                                                                     wo                       eae         .
     There are a number of timber bridges that are                   - Age     Based Condition Profile
     reaching the end of life with the Old Noosa Road                4%  100,000
     Bridge the highest priority, and will. require                  = a
     replacement in the next two to three years. In                  o
     addition there are approximately $10m worth of                  5    50,000
     bridges requiring replacement or rehabilitation                 2
     over the next 10 years.                                                         a           a
                                                                               0                      cae    -_
                                                                                     1     2     3     4     5
                                                                                        Condition Rating

    Improvement Plan
        1.  Continue with cyclical level 1 and 2 inspections across all bridge assets with results and overall bridge
            asset condition recorded in asset system;
        2.  Reconcile financial asset data, GIS data and Inspection data to have a single point of truth for bridge
            assets within the asset system;
        3.  Develop along term asset replacement programme integrated with financial planning and asset
  ‘         deterioration modelling;
|       4.  Produce ‘next generation’ Asset Management Plans at a lower level of asset class hierarchy, for example
            specific to bridge deck, abutments, headstocks, pylons etc.
 \      5.  Undertake valuations on individual bridges to determine bridge values.

     NOOSA COUNCIL                    PO Box 141                     P. (07) 5329 6500          [email protected]
     t Set 1D: 199618;                TEWANTIN QLD 4565              F. (07) 5329 6501          www.noosa.qlid.gov.au

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