Asset Management Plan For Sewerage

IMPORTANT - Please note, that this plan has been copied from the drainage plan and is being updated gradually, some of the information below still refers to the drainage system

1. Introduction and Overview

This Asset Management Plan (AMP) is based on the minimum requirements for Asset Management Plans in Queensland as detailed in the Asset Management Advancement Program.

1.1 Scope

The following Infrastructure classes and sub-classes are covered by this plan:

1.2 Asset Hierarchy

Asset Management Advancement Program requires that consistent Asset Hierarchies be established for all data sets by 31 December 2009.

TBA

1.3 Quantitative Data

Council is responsible for

1.4 Links to Other Documents

The following documents have been referred to in developing this plan.

2. Service Levels

The following service levels have been derived from Service Planning

2.1 Required Service Levels

Problem Intervention Level Remedy Response Time
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- - - -
- - - -

2.2 Actual Service Levels

Problem Intervention Level Remedy Response Time
- - - -
- - - -
- - - -

3. Future Demand

The following Future Demand Forecasts have been derived from Corporate Planning and Service Planning

3.1 Future requirements associated with corporate plans or operational plans

No future requirements associated with the corporate plan or the operational plan have been identified.

3.2 Known or possible areas for expansion

There are several factors that may effect the demand for and on drainage assets.

3.3 New Subdivisions

Council is gifted drainage infrastructure on a regular basis, with a significant number of new subdivisions coming off maintenance each year.

3.4 Population Growth

According to the OESR Queensland Regional Database Bundaberg Regional Council's estimated population has increased from 78,943 in 2001 to 95,132 in 2009.

Year Population % Increase
2001 78,943 -
2002 80,369 1.81%
2003 81,579 1.51%
2004 83,238 2.03%
2005 85,522 2.74%
2006 87,898 2.78%
2007 90,302 2.73%
2008 92,651 2.60%
2009 95,132 3.00%

3.5 Changes in Land Use

Bundaberg Regional Council has yet to finalise a consolidated Planning Scheme for the amalgamated Council. If any changes in land use effecting future demand are included in the new scheme they will be identified here.

3.6 Changes to Government Policy & Regulations

No changes to government policy or regulations have been identified in this plan.

3.7 Asset classes and potential acquisition dates

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3.8 Cost estimates

The costs of changes in the future demand on drainage have yet to be calculated.

3.9 Impact of future demand on service levels, asset lifecycle and financial considerations

The impact of future demand on service levels, asset lifecycle and financial considerations has yet to be ascertained.
The following Future Demand Forecasts have been derived from Corporate Planning and Service Planning

4. Lifecycle Management and Financial Considerations

4.1 Useful Life

The useful life of most sewerage assets will depend on a range of environmental factors. The estimated useful lives given below which have been extracted from the Assetic Asset Management System are best guess averages.

Asset Sub-classpixel.png Useful Life Average RUL Annual Depreciation
Absorption Trenches 80 years 62.4 years $4,819.00
Causeways 80 years 44.8 years $31.34
Gravity Pipes 80 years 51.4 years $1,053,550.41
Lagoons 80 years 20 years $3.00
Low Flow Pipes 80 years 28.2 years $1,314.00
Natural Channels 80 years 35 years $160.00
Open Channels 80 years 60.4 years $17,784.88
Retention Basins 80 years 62 years $115,049.41
Road Culverts 80 years 50.2 years $91,076.35
Asset Sub-classpixel.png Useful Life Average RUL Annual Depreciation
Stormwater Pits 80 years 65.0 years $251,790
Headwalls 80 years 46.0 years $62,734.21
GPTs 80 years 72.5 years $776.2
Channels 80 years 53.4 years $1,674.40
Flood Devices 80 years 72.0 years $7,908.75

4.2 Valuation

The figures below were extracted from the Assetic Asset Management System on 30 September 2009.

Asset Sub-classpixel.png Replacement Cost Written Down Replacement Cost
Natural Channels $12,800 $5,440
Open Channels $1,422,790.62 $1,100,590.61
Causeways $2,507.46 $1,372.83
Lagoons $240 $57
Retention Basins $9,203,952.65 $8,137,065.75
Absorption Trenches $385,520 $296,139.4
Gravity Pipes $84,284,033.04 $48,225,517.39
Low Flow Pipes $105,120 $35,828.4
Road Culverts $7,286,108.46 $5,044,407.78
Asset Sub-classpixel.png Replacement Cost Written Down Replacement Cost
Stormwater Pits $22,381,383.12 $18,412,900.65
Headwalls $5,576,375.11 $3,196,384.03
GPTs $69,000 $60,306
Channels $148,836 $101,738.80
Flood Devices $703,000 $639,730

4.3 Maintenance Activities

Council performs a number of maintenance activities in relation to drainage assets, including:

There are eight drainage maintenance activities in BARS.

  • Maintain & repairs to culverts, pipes
  • Drainage Miscellaneous
  • Open Drains Concrete Repairs
  • Culvert Repairs
  • Catchpit Repairs
  • Manhole Repairs
  • Access Repairs
  • Aquifer Maintenance
  • Clean culverts pipe pits (mjr)

Maintenance Expenditure is detailed in the table below.

Asset Sub-class Annual Maintenance Expenditure
Drainage Basins $?
Open Channels $?
Stormwater Drains $?
Stormwater Pits $?
SQIDs & GPTs $?

4.4 Renewal/Replacement Plan

Council's Stormwater Drainage Renewal/Replacement Plan is based the estimated RULs of individual assets in Council's Asset Register. Because drainage assets are typically long life assets, only assets identified as being in condition 4 are likely to need to be replaced over the next 10 years. Assets in condition 4 have had there RULs set to 8 years, but for the purpose of the renewal expenditure table below the cost has been apportioned equally over the 10 year period.

Projected Stormwater Drainage Renewal Expenditure
Drainage Basins Open Channels Pipes & Culverts Pits & Headwalls Otherpixel.png
2010-2011 $0 $0 $83,605.38 $0 $0
2011-2012 $0 $0 $83,605.38 $0 $0
2012-2013 $0 $0 $83,605.38 $0 $0
2013-2014 $0 $0 $83,605.38 $0 $0
2014-2015 $0 $0 $83,605.38 $0 $0
2015-2016 $0 $0 $83,605.38 $0 $0
2016-2017 $0 $0 $83,605.38 $0 $0
2017-2018 $0 $0 $83,605.38 $0 $0
2018-2019 $0 $0 $83,605.38 $0 $0
2019-2020 $0 $0 $83,605.38 $0 $0

4.5 Creation/Acquisition Plan

Council's Stormwater Drainage Creation/Acquisition Plan details projected new and upgrade capital expenditure on stormwater drainage assets over a ten year period.

Projected Stormwater Drainage New and Upgrade Capital Expenditure
Drainage Basins Open Channels Pipes & Culverts Pits & Headwalls Otherpixel.png
2010-2011 $0 $0 $0 $0 $0
2011-2012 $0 $0 $0 $0 $0
2012-2013 $0 $0 $0 $0 $0
2013-2014 $0 $0 $0 $0 $0
2014-2015 $0 $0 $0 $0 $0
2015-2016 $0 $0 $0 $0 $0
2016-2017 $0 $0 $0 $0 $0
2017-2018 $0 $0 $0 $0 $0
2018-2019 $0 $0 $0 $0 $0
2019-2020 $0 $0 $0 $0 $0

4.6 Disposal Plan

Council's Stormwater Drainage Disposal Plan details the proposed timing of asset retirements/disposals and the estimated residual values of assets being retired or disposed of.

Projected residual value of future stormwater drainage retirements & disposals
Drainage Basins Open Channels Pipes & Culverts Pits & Headwalls Otherpixel.png
2010-2011 $0 $0 $0 $0 $0
2011-2012 $0 $0 $0 $0 $0
2012-2013 $0 $0 $0 $0 $0
2013-2014 $0 $0 $0 $0 $0
2014-2015 $0 $0 $0 $0 $0
2015-2016 $0 $0 $0 $0 $0
2016-2017 $0 $0 $0 $0 $0
2017-2018 $0 $0 $0 $0 $0
2018-2019 $0 $0 $0 $0 $0
2019-2020 $0 $0 $0 $0 $0

4.7 Risk Management Plan

Council recognises 4 levels of risk, low, medium, high and extreme. These risk associated with a given hazard is calculated in accordance with Councils Risk Management Policy using the following risk matrix.

Risk-Matrix.png

Table 4.7.1 - Possible Risk & Mitigation Options

Possible Risks & Mitigation Options
Hazard Level of Risk Mitigation Strategy
Drowning in Open Drain High Warning Signs/Restrict Access

* Identification of risks
* Identification of risk mitigation strategies

5. Asset Management Practices

  • Council is in the process of implementing the Assetic Asset Management System. It is expected that Assetic will be used to schedule maintenance & generate asset renewal programs.
  • The following standards & guidelines are used to make decisions about asset management related matters.
    • ?
    • ?

6. Improvement and Monitoring

6.1 Known data quality issues

  • A number of pipe diameters appear to have been altered when the databases of the four former Councils were amalgamated.

6.2 Data quality issue mitigation

  • All pipe diameters are being checked against the databases they were extracted from and will be corrected, and a revaluation applied to drainage table prior to new drainage assets being inserted into the database in the 2009-1010 financial year.

6.3 Estimate of Reliability

  • The majority of the figures used in this plan were generated from Council's Assetic Asset Management System. The asset database was compiled from numerous databases and spreadsheets used by the former Councils of Bundaberg, Burnett, Isis & Kolan. The quality of the data available varied from Council to Council and asset class to asset class, and has been further degraded as a result of the compilation process used by the consultants responsible for the implementation of the system. As a result the figures used in this plan whilst indicative of the scope and condition of the drainage network, but should not be presumed to be 100% accurate at this point in time.
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