Bridges

Condition

The City of Whittlsea appears to use a three point condiiton scoring system for bridges.

  • Good
  • Fair
  • Poor

In May 2003 a general review of bridge condition identified that 3 bridges were in poor condition, 1 was in fair condition, and that the remainder (including all VicRoads bridges) were in good condition.

Bridges are subject to an inspection regime that comprises a bi-annual routine maintenance inspection (Level one) in addition to inspections to assess current condition of the bridges.
The frequency of level two condition inspections is based on the age and known condition of the bridges. That is, older bridges and those that are showing signs of structural deterioration are inspected more frequently (annually) than those with minimal signs of deterioration (up to 5 years)
Level three inspections are drawn from the level two inspection where structures are reported in poor condition, showing signs of accelerated deterioration and where significant work is proposed for a structure.
Level one condition inspections are carried out by the Operations Engineer and Rural Works Foreman twice a year. Level two condition inspections are carried out by the Assets Engineer on a programmed basis up to five years apart. Level three condition inspections are carried out by a qualified Bridge Engineer.

Data

Bridge data is located in a number of places.
The official bridge register is located within Authority, but the location of bridges is recorded in the GIS, and additional information is locaed in various locations on K-drive
e.g. K:\FINANCE\WORKSMART\ASSET MANAGEMENT\_PUBLIC\ASSET INFORMATION\Bridges

Data is imported into the Moloney Asset Management System Bridge Module for analysis.

Maintenance

Maintenance work is managed by Operations using Council or contracted resources.
A significant proportion of the bridge maintenance is identified from bridge inspections.

Photos

A number of bridge photos from inspections carried out in 2005/6 are located in the following directory:
K:\FINANCE\WORKSMART\ASSET MANAGEMENT\_PUBLIC\ASSET IMAGES\Bridges\2005n06 Level 2 Bridge Inspection

Quantity

As at June 2011 there were 134 bridges & culverts recorded in the bridge register.

Scope

The bridges asset class comprises;

  • road bridges
  • major culverts
  • pedestrian footbridges.

Useful Life

Bridge Useful Life Table

The estimated useful life of bridges depends on the type and material of the bridge.

Type Useful Life
RC Road Bridge 100 Years
RC Footbridge 80 Years
Timber Footbridge 40 Years
Small Timber Footbridge 25 Years

Valuation

The value of Council's bridges as at 30 June 2011 was

Replacement Cost Accumulated Depreciation Written Down Replacement Cost
$20,192,725 $3,945,867 $16,246,858

K:\FINANCE\WORKSMART\ASSET MANAGEMENT\_PUBLIC\ASSET INFORMATION\Bridges\Asset Valuation\FY11 Bridges Asset Valuation

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