2018-08-07 S&O Agenda - Att 1 to Item 1 - Draft Bridges Asset Management Plan

The safety and condition of bridge structures on Council’s road network is monitored through a three
level hierarchical inspection regime based on the Department of Transport and Main Roads
guidelines.

The three inspection levels are as follows:

Level 1 – Routine Maintenance Inspection − A visual inspection to check the general serviceability
of the structure, particularly for the safety of road users and to identify any emerging problems. Leve;
1 inspections are conducted every 6 months.

Level 2 – Condition Rating Inspection − An inspection to assess and rate the condition of a
structure (as a basis for assessing the effectiveness of past maintenance treatments, identifying
current maintenance needs, modelling and forecasting future changes in condition and estimating
future budget requirements). Level 2 inspections are conducted every 3 years or more frequently if
recommended from previous inspections.

Level 3 – Special Inspection − An inspection to provide improved knowledge of the condition, load
capacity, in-service performance or any other characteristic beyond the scope of other types of
inspection. Special inspections may be used to inform/develop the scope of other types of inspection.
The frequency of level 3 inspections will be a result from an escalation from a previous level 2
inspection in the first instance.

Level 3 inspection categories include:
   structural engineering
   Asbestos Containing Material (ACM) identification
   ACM verification
   underwater access
   fracture critical/low redundancy
   sub-standard load rating
   complex/unique structures
   known/suspected deficiencies
   confined space inspection.


Condition Assessments (CA) are conducted as part of the Level 2 inspections, undertaken by
Council staff on a 3 yearly cycle or more frequently if recommended from a previous inspection(s).
The CA covers all bridge components above the high water mark and provides an overview of the
condition of the components of a bridge. The Level 2 inspections are the trigger to activate the need
for a Level 3 type inspection, which is a more invasive and detailed condition assessment of all
bridge components. Level 3 inspections are only undertaken when there is escalations in defects
observed from a Level 2 inspection or when recommendations from previous Level 3 inspections are
recommended to do so.

The Level 3 assessment includes:
    estimated economic life,
    asset condition,
    repair priorities,
    expected year of replacement and costs for replacement of assets,
    underwater components,
    more detailed electrical/ mechanical assessments that were not included in previous
      inspection, and
    consideration of future condition assessment timeframes.




Asset Management Plan: Road Bridges                                                              Page 9