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2019-02-12 Attachment 1 to Item 3 - Stormwater Infrastructure Asset Management Plan
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12 February 2019
Att 1 to Item 3
DRAFT
Asset Management Plan
Stormwater Infrastructure
February 2019
Revision 1.0
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Section 2
Table of Contents
1. Executive Summary ............................................................................................................. 3
2. Introduction .......................................................................................................................... 4
Asset Management Plan Definition and Purpose...................................................... 4
Scope ....................................................................................................................... 4
Stormwater Infrastructure ......................................................................................... 4
Stormwater Infrastructure Asset Management Objectives ........................................ 5
Levels of Service ...................................................................................................... 5
Legislative, Standards & Guidelines ......................................................................... 5
Current Levels of Service ......................................................................................... 5
Measured Levels of Service ..................................................................................... 6
3. Future Demand .................................................................................................................... 6
Demand Drivers ....................................................................................................... 6
Demand Impacts on Assets...................................................................................... 7
Climate Change Adaptation...................................................................................... 7
4. Lifecycle Management Plan ................................................................................................ 8
Assets ...................................................................................................................... 8
Asset Valuation ........................................................................................................ 8
Asset Condition ........................................................................................................ 8
Stormwater CCTV Inspection Program .................................................................. 11
Stormwater Infrastructure Operations & Maintenance Plan .................................... 12
Asset Renewals ..................................................................................................... 13
Capital Upgrades and New Assets ......................................................................... 14
Capitalisation of Assets .......................................................................................... 14
Disposal and Replacement of Assets ..................................................................... 15
5. Risk Management .............................................................................................................. 16
Critical Assets ........................................................................................................ 16
Risk Assessment.................................................................................................... 16
6. Financial Summary ............................................................................................................ 17
Financial Statements and Projections .................................................................... 17
Funding Strategies ................................................................................................. 17
Budget Forecasts ................................................................................................... 17
7. Plan Improvement and Monitoring ................................................................................... 19
Status of Asset Management Practices .................................................................. 19
Improvement Program............................................................................................ 19
Monitoring and Review Processes for the Asset Management Plan ....................... 20
Asset Management Effectiveness .......................................................................... 20
8. ANNEX A: Levels of Service ............................................................................................ 21
9. ANNEX B: Stormwater Infrastructure Stakeholders ........................................................ 22
Asset Management Plan: Stormwater Infrastructure Page 1
Section 3
10. ANNEX C: Document Management .................................................................................. 23 11. ANNEX D: Stormwater Infrastructure 10-Year Capital Works Program ........................ 24 Asset Management Plan: Stormwater Infrastructure Page 2
Section 4
1. Executive Summary Noosa Council is responsible for a diverse and extensive range of community assets which represents a major investment over many years. To fulfil its objectives in delivering a variety of services to the community, Council must ensure that the assets supporting these services are managed in a way that guarantees an optimal balance of cost, risk and performance. Council’s Stormwater Infrastructure plays a vital role in the management of stormwater drainage in both urban and rural communities across the Noosa Shire. There are in excess of 22,000 financial Stormwater Infrastructure assets on Council’s register considered in this Asset Management Plan (AMP). The Stormwater Infrastructure assets have a current replacement value of $177m, equating to approximately 17% of Council’s financial assets. Operational and maintenance activities are fundamental for the ongoing management of the Stormwater Infrastructure; it is considered an investment not a liability. The Stormwater Infrastructure assets rely on operational and maintenance costs for the serviceability of the assets identified in this plan. These activities are a significant annual investment that directly influence the potential for Stormwater Infrastructure assets to reach its intended service life. The ongoing development of asset knowledge through asset inspections, improved maintenance activities, subsequent defect monitoring and repairs are fundamental in developing sustainable intervention levels for renewals and replacement of Stormwater Infrastructure assets. The operational and maintenance expenses for Stormwater Infrastructure make up approximately 4% of the $90m annual budget. The capital works program fluctuates from year to year, however, the proposed 2018/19 capital works program the capital investment of $635k for Stormwater Infrastructure equates to only 2% of the $29.5m capital works program. The mitigation of risks is fundamental in the management of Stormwater Infrastructure assets for Council to make informed decisions. With the focus placed on consistent cyclical inspections across all Stormwater Infrastructure assets and condition data accurately recorded in the Technology One - asset management system (T1). This will be achieved by reconciling financial asset data, GIS data and inspection data to have a single point of truth for all Stormwater Infrastructure assets. This Stormwater Infrastructure asset management plan (AMP) meets the objectives of the Noosa Corporate Plan. Key focus areas under the Corporate Plan’s Theme 4: Long term planning for Noosa Shire – includes: undertaking long term financial sustainability planning identifying asset management outcomes and establishing functional Asset Management Plans for all Council asset classes. These focus areas have been a major driver in the development of this AMP. The Stormwater Infrastructure AMP provides the relevant information and organisational activities to ensure the organisational objectives for asset management have been achieved and that the pathway for continual improvement across all management activities for Stormwater Infrastructure has been established. The provision of Stormwater Infrastructure is, therefore, a significant pillar of the infrastructure services provided by Council. Asset Management Plan: Stormwater Infrastructure Page 3
Section 5
2. Introduction
Asset Management Plan Definition and Purpose
“Documented information that specifies the activities, resources and timescales required for an
individual asset, or a grouping of assets, to achieve the organisation’s asset management
objectives.”1
The purpose of the Stormwater Infrastructure asset management plan is to define the whole of life
activities associated with operating and maintaining of stormwater infrastructure for the Noosa
Community. The plan identifies the assets and the levels of service to meet the expectations of the
Noosa Community. A key outcome of the asset management plan is the identification of the current
state of the asset conditions and the development of renewal and maintenance plans. Importantly,
the identification of future costs and potential risks to the assets that support the service for operating
stormwater infrastructure is fundamental in achieving the asset management objectives for Noosa
Council.
Scope
The scope of this asset management plan is to ensure the Stormwater Infrastructure meets,
demonstrates and incorporates the following key asset management objectives:
• A description of assets and the services provided;
• Links to Councils long term financial plan through:
o An asset renewal program reflecting Council’s Capital works program.
o A maintenance program.
• Levels of service and demand are identified and determined.
• The assets are identified with a condition.
• Life cycle costs are addressed.
• Long-term cash-flow requirements are forecasted for asset renewals, maintenance and
operations.
• Asset rationalisation and disposal is addressed.
• The risk management activities associated with the Stormwater Infrastructure.
Stormwater Infrastructure
There are many different asset types within the Stormwater Infrastructure asset management plan,
with various units of measurement. These assets included in this AMP are summarised below:
o 10,623 (223km) Pipes
o 9,640 Pits
o 3,312 Structures
o 14 Bio retention Basins
o 15 Gross Pollutant Traps (GPT)
o 9 Open Drains
Stormwater Infrastructure assets are critical infrastructure to the management of stormwater run off
across Council’s communities. This asset management plan (AMP) consolidates Councils available
data and analysis on the Stormwater Infrastructure assets. It also presents the output of how
systematic approaches are applied by Council to optimally balance cost, risk and performance. This
is essential to meet forecasted demand and the levels of service required.
1 ISO 55000:2014 (3.3.3) Asset Management – Overview, principles and terminology
Asset Management Plan: Stormwater Infrastructure Page 4
Section 6
Stormwater Infrastructure Asset Management Objectives
The AM objectives detailed in the AMP include:
• A consolidated asset register that identifies:
o Asset description;
o Asset condition;
o Useful life and renewal dates; and
o Replacement costs.
• The levels of service provided by Stormwater Infrastructure to the Noosa Community;
• Current and future maintenance expenditure;
• Identifying any future demand forecasts for the Stormwater Infrastructure;
• Identifying any legislative considerations necessary in the management of the Stormwater
Infrastructure;
• Documenting the financial forecasts for the Stormwater Infrastructure;
• Identifying all risks and opportunities related to management of the Stormwater Infrastructure;
and
• Documentation of any future actions identified to improve the asset management objectives of
the Stormwater Infrastructure.
Levels of Service
The levels of service that are currently being maintained for Council’s Stormwater Infrastructure are
aligned to the Corporate Plan and Branch Plan objectives. The continuous development and
implementation of the asset management objectives that include good asset governance and asset
knowledge are also aligned to the Corporate Plan objectives. The service delivery is provided
internally with external specialists and technical consultants engaged as required.
Any changes in the levels of service to the Stormwater Infrastructure will be required to demonstrate
the benefit and be approved by Council. Changes in levels of service should be addressed through
the asset management governance framework prior to the approval by Council.
Legislative, Standards & Guidelines
The legislative, Standards and guidelines relative to Stormwater Infrastructure are:
• Queensland Urban Drainage Manual (QUDM) – 4th Edition
• AP-23/94 Waterway Design: A Guide to the Hydraulic Design of Stormwater Infrastructure,
Culverts & Floodways.
• IPWEA Standards
• RPEQ Certification
Current Levels of Service
The current levels of service for stormwater infrastructure include the provision and maintenance of
a stormwater drainage network and other measures to minimise impacts to the road transport
network, private property and the environment. Council’s Stormwater Infrastructure assets are
designed and constructed in accordance to the Queensland Urban Design Manual (QUDM) and
determines the levels of service. The overall management of Council’s Stormwater Infrastructure are
in accordance with the QUDM Guidelines and the various Australian Standards that support the
specific asset types of the Stormwater Infrastructure.
Asset Management Plan: Stormwater Infrastructure Page 5
Section 7
Regular inspections are critical to the management of Stormwater Infrastructure and the inspections
undertaken by Council, and by third party providers will meet the standards and statutory
requirements to ensure all assets meet the intended design performance. The scheduled
maintenance activities will be within the defined timeframes to ensure that all potential or identified
defects are rectified.
Levels of service must be readily measurable and preferably from available data sources. Each level
of service should be stated in terms of appropriateness and understood by the community for whom
the service is provided. The levels of service in this AMP are intended to:
Measure of the effectiveness of this AMP;
Inform the Noosa community of the proposed type and level of service to be offered by Council;
Assist with identification of the expenditure and benefits of the Noosa Council services being
offered;
Inform the Noosa community to assess the affordability and suitability of the Noosa Council
services being offered;
Provide focus for the development of future Stormwater Infrastructure asset management
strategies;
Provide guidance for current and future services to be offered; and
Define the specific levels of service provided by Noosa Council.
The levels of service outlined in this Stormwater Infrastructure AMP are also aligned to:
Statutory, legislative and relevant code requirements.
Information obtained from asset condition assessments and maintenance analysis; and
Noosa Council’s Corporate Plan.
The levels of service have been catalogued and are located at Annex A.
Measured Levels of Service
To demonstrate the levels of service of the Stormwater Infrastructure assets, Noosa Council
undertook an exercise to define the service outputs of the stormwater Infrastructure assets. These
service outputs are tabled at Annex A. The service output documents are to be utilised to inform
responsible staff of their obligations in maintaining the current levels of service. When targets are
not achieved, they should be escalated and reported through the Asset Management Governance
Framework.
3. Future Demand
Demand Drivers
There is currently an inconsistent approach of demand management applied to the management of
the Stormwater Infrastructure. Flooding of dwellings is the key driver for Council to act on potential
upgrades. Climate Change adaptation and the retrofitting of assets to prevent flooding in the climate
change adaptation high risk areas is currently being considered.
The stormwater systems are designed to carry water runoff and thus have the potential to transport
pollutants into Noosa’s water catchments. Therefore, future consideration to install environmentally
protected devices and structures for the filtration and capture of pollutants to improve the overall
environmental objectives of Noosa Council will be a key demand driver into the future.
Flooding and community safety are key demand drivers on the current and future levels of
serviceability for Stormwater Infrastructure. Improved monitoring of these activities should act as an
indicator to reviewing demand management for specific assets within the Stormwater Infrastructure.
Asset Management Plan: Stormwater Infrastructure Page 6
Section 8
It is Council Policy that any change in the level of service due to demand is reported to Council in
accordance with current guidelines and practices.
The major drivers of capital upgrade for Stormwater Infrastructure will be:
external funding opportunities to improve trunk networks,
risk management – including Flooding and safety,
changes to density of dwellings on lots (bigger houses on smaller lots),
climate change adaptation,
environmental and river management initiatives,
flood mitigation,
changes in technologies,
Impacts on operational and maintenance activities.
The various and regular Stormwater Infrastructure inspection programs will act as a trigger for any
need to improve on preventative maintenance activities to preserve the life of the assets. The
development of a stormwater maintenance program/plan to record known issues and areas that
require attention prior and during storm seasons will create greater efficiencies and ensure there is
no loss of technical and maintenance knowledge of the stormwater infrastructure in to the future.
In addition, trials with new technology are being considered to reduce litter and pollutants entering
downstream waterways and thus improve water quality. These trials have the potential to determine
the priority of upgrade works required or as a minimum, identify the feasibility of retrofitting devices
on these assets in the future.
Demand Impacts on Assets
There are particular areas of Council’s stormwater network that are sensitive during peak rainfall
events. This is predominately in low lying and tidal areas. Continued monitoring of these assets
during these periods to determine any potential remediation works and aided by climate change
adaption initiatives to improve water quality of the receiving waters in future.
Other demand impacts on the stormwater network relate to periods of scheduled works for asset
repairs/refurbishment or maintenance works. These scheduled activities should ideally be
undertaken outside of the wetter seasons to minimise impacts of stormwater within the proximity of
works.
Climate Change Adaptation
Climate Change Adaptation initiatives will be another demand driver that will affect assets that are
located in coastal and foreshore areas. Current and expected future extents of shoreline recession,
storm erosion, storm-tide, and permanent tidal water extents must be taken into consideration in the
design of future upgrades for those affected assets.
Affected assets can be identified in the new coastal hazard layers created as part of Council’s
development of a Climate Change Adaptation Plan and viewed on Intramaps. These coastal hazard
layers are located in the Development Assessment module, under the ‘Coastal Hazards’ folder.
Consideration of future climate risks is most critical for long-lived assets, such as stormwater
infrastructure. Therefore, a tidal waters extent vulnerability assessment for stormwater assets that
takes into account projected expansion of tidal water extents is required (NB: assessment already
underway, and expected mid2019). Consultation with Council’s Program Coordinator - Climate
Change Adaptation should be undertaken when considering any renewal or upgrade of assets within
these zones.
Asset Management Plan: Stormwater Infrastructure Page 7
Section 9
4. Lifecycle Management Plan
Assets
Council’s Stormwater Infrastructure plays a vital role in managing stormwater drainage within the
Noosa Shire. There are many different asset types within the Stormwater Infrastructure asset
management plan, with various units of measurement.
These assets included in this AMP are summarised below:
o 9,331 Pipes (223km)
o 9,640 Pits
o 3,312 Structures
o 14 Bio retention Basins
o 15 Gross Pollutant Traps (GPT)
o 9 Open drains
Asset Valuation
The value of the Stormwater Infrastructure Assets, at the end of the financial year 2017/2018 for the
purposes of this AMP is summarised below.
Current Asset Accumulated
2018 Written Down Value
Cost Depreciation
Totals $ 177,738,098 $ 57,692,742 $ 120,045,357
Table 1: Stormwater Infrastructure Asset Valuation
Asset Condition
Levels of service and asset management decision making is directly linked to asset condition; this
determines what condition the asset should be in before an asset management intervention. The
intent of current and future Condition Assessments (CA) is to:
• Provide a robust and repeatable process for carrying out condition assessments on Council’s
Stormwater Infrastructure assets;
• Use condition assessments to develop programs for intervention with regards to further
inspection, monitoring, maintenance and renewals;
• Provide a basis for information for the modelling of condition data for likelihood of asset failure
for those assets not inspected.
A consistent condition ranking scale has been chosen by Council as the framework for measuring
Stormwater Infrastructure assets, based on the 1 to 5 ranking according to the International
Infrastructure Management Manual (IIMM). Any asset scoring 4 (fair) to 5 (poor) will be considered
and prioritised under an asset specific renewal program.
On the completion of the data reconciliation process, the collected condition assessment attributes
will be loaded into the Technology One asset system, the data will be analysed and modelled to
create a renewal program for those assets. It is anticipated that it will take 3 -5 years to complete a
full stormwater network condition assessment.
Asset Management Plan: Stormwater Infrastructure Page 8
Section 10
There are a number of different asset classes within the Stormwater Infrastructure that are yet to have a physical condition assessment assigned to them within the Technology One System until the data has been reconciled. For the purpose of this AMP, the assets within the financial asset register are referred to as commissioned assets and have been assigned an age-based condition which is determined on the remaining life of the asset. Further development and prioritisation is required to ensure that all Stormwater Infrastructure assets are reconciled within the asset system and condition assessments are undertaken or for those assessments completed are assigned within technology one system. In asset reporting an approach to linking individual assets to the specific asset class has been undertaken. Figure 1 details the pipes, pits and structures asset conditions and at figure 2 includes all other Stormwater Infrastructure asset classes that are considered in this AMP. These assets are grouped consistently and reported accordingly throughout this document. Any Stormwater Infrastructure assets that have reached condition 5 will be included in the relevant renewal programs of the 10-year Capital Works Program. Figure 1: Condition by Number of Assets Figure 2 identifies all Stormwater Infrastructure assets other than those assets defined in Figure 1. The graph highlights that there are only a small volume of other stormwater infrastructure assets that are currently on the asset register. The reported condition is based on the anticipated remaining life of the stormwater infrastructure assets and does not reflect the physical condition of those assets. Undertaking physical condition assessments of the assets represented in Figure 2 is required. Physical condition knowledge will assist in developing a more realistic approach to developing renewal plans that are prioritised and planned. Asset Management Plan: Stormwater Infrastructure Page 9
Section 11
Figure 2: Condition of Other Infrastructure by Number of Assets The breakdown of replacement costs by asset condition is detailed in the graph below (figure 3). The importance of the graph is to identify the value of each asset classes’ condition and where future investments are required to renew or rehabilitate the Stormwater Infrastructure assets. The importance of the financial value against each condition enables Council to identify the necessary funding requirements of each asset class into the future. Once an asset is rehabilitated or renewed the condition rating will be adjusted within the asset management system (T1). The timing and renewal of the stormwater assets will be addressed in the development of future renewal programs and will be reflected in Council’s 10-year Capital Works Program. Figure 3: Stormwater Asset Condition by Value Asset Management Plan: Stormwater Infrastructure Page 10
Section 12
The significance of the above graph is that pipes and pits represent a high asset value with those
assets in condition 4 having a combined value of $36m. The current condition is based on the
remaining life of the asset. Through the proactive stormwater CCTV inspection program it is
assumed from current trends in assets collected, that the majority of these assets conditions will be
better condition than the age based approach. The ongoing delivery of the stormwater CCTV
program will enable the development of a robust renewal program for the pipes and pits assets. The
development of renewal programs for each asset class is essential in further improving the 10-year
Capital Works Program.
Stormwater CCTV Inspection Program
Noosa Council commenced proactive condition assessments of the Stormwater pits and pipes in
2015. Initially, the approach was to undertake detailed inspections of pipes that had a history of
known issues within the Shire. The stormwater CCTV inspection program is undertaken by
contracted services due to the volume of assets and data attributes that are collected across the
stormwater network. The data is reviewed to determine assets that require renewal.
Localities such as Sunrise Beach, Noosaville foreshore area and Sunshine Beach have remained
the focus for the inspections. As a result of these inspections Council has undertaken significant
remediation works on stormwater infrastructure including Sunrise Beach - Ben Lexcen Drive
stormwater rehabilitation, Noosaville - Lake Weyba Drive Culvert replacements and Noosaville -
Thomas Street culvert replacement. In addition to these works there are planned works over coming
years to reline and replace the majority of culverts and pipes in the proximity of Gympie Terrace,
Noosaville. The pipes in these areas have been affected by the tidal/marine environment, resulting
in significant decay and loss of structural performance.
The stormwater CCTV inspection program demonstrates a significant investment by Noosa Council
in establishing good asset management practices by having good asset condition knowledge. This
proactive inspection regime has enabled Council to identify stormwater issues in high risk areas of
the Shire. Since December 2018, a total of 34km of pipe and pits or 15% of the stormwater pipe
network has been condition assessed. Council is committed to continue inspecting the network to
have accurate condition knowledge across the stormwater pipe and pit network. This process is
anticipated to take between 3-4 years to be completed in its entirety.
Figure 4 has been produced to demonstrate the captured conditions of the pipe and pit inspections
collected from the Stormwater CCTV inspection program. The data collected from these inspections
is currently stored in spreadsheets until the reconciliation of stormwater asset data within the
Technology One asset system can be completed. Upon completion of the reconciliation of
stormwater data these conditions will be assigned against the assets within the Technology One
asset system. For the purpose of providing up to date data within this document the collected asset
condition assessments from the CCTV inspection program will be provided in addition to the assets
on the asset register and are detailed in Figure 4.
The graph below in figure 4 indicates that the majority of Council’s inspected stormwater assets are
in a good to very good condition. The continued approach to having good sustainable asset renewal
interventions will ensure this level of condition is achieved across future generations. Figure 4 is a
reflection of approximately 15% of the pipe and pit network inspected to date. The graph
demonstrates a trend in the data captured and confirms that the assets are in a better condition than
the age based approach that are represented in figures 1 & 2.
In addition to the CCTV inspection program, council staff undertake visual condition assessments
for requests that have been reported for stormwater issues. These assessments are undertaken on
a “reactive” approach to determine if the request warrants stormwater infrastructure to be prioritised
and considered for future renewal.
Asset Management Plan: Stormwater Infrastructure Page 11
Section 13
Figure 4: Condition of Stormwater CCTV inspected assets by Number of Assets
Stormwater Infrastructure Operations & Maintenance Plan
Operational and maintenance activities are fundamental for the ongoing management of the
Stormwater Infrastructure; it is considered an investment rather than a liability. The Stormwater
Infrastructure assets rely on operational and maintenance costs for the serviceability of the assets
identified in this plan. These activities are a significant annual investment that directly influence the
potential for Stormwater Infrastructure assets to reach its intended service life. The ongoing
development of asset knowledge through asset inspections, improved maintenance activities,
subsequent defect monitoring and repairs are fundamental in developing sustainable intervention
levels for renewals and replacement of Stormwater Infrastructure assets.
Budget Forecast Forecast Forecast Forecast
Year 2018/19 2019/20 2020/21 2021/22 2022/23
O&M $ 3,462,072 $3,531,313 $3,601,939 $3,673,978 $3,747,458
Forecast Forecast Forecast Forecast Forecast Forecast
Year 2023/24 2024/25 2025/26 2026/27 2027/28 2028/29
O&M $3,822,407 $3,898,855 $3,976,832 $4,056,369 $4,137,496 $4,220,246
Table 2: Annual Operational & Maintenance Costs by Asset Group
Maintenance and operational costs are identified to ensure council understands the whole of life
costs associated with the day-to-day management of Stormwater Infrastructure assets. The figure
below identifies the long term financial commitment required in maintaining assets. In order to
maintain assets to an acceptable level, the cumulative investment over a ten-year period will equate
to $42m. It is proposed to develop a more detailed list of operational and maintenance activities per
annum by asset class and utilise the T1 asset management system to identify maintenance by the
breakdown of asset classes within the Stormwater Infrastructure asset classes. In addition, more
detailed and longer term planning for maintenance has been identified as an improvement from this
AMP.
Asset Management Plan: Stormwater Infrastructure Page 12
Section 14
Figure 6: Stormwater Infrastructure Operating & Maintenance Costs & Forecast
Asset Renewals
The purpose of developing a renewal plan is to identify assets that need to be replaced to maintain
the current level of service. Asset failure due to lack of renewal activities will affect the capacity to
deliver future renewals of Stormwater Infrastructure and subsequently the service Stormwater
Infrastructure provides to the Noosa Community. The stormwater drainage network in the coastal
area is sensitive at peak tides and significant storm events, the failure of any of those assets will
result in potential flooding of roads and property.
Stormwater Infrastructure asset renewals are condition based. Condition assessments provide staff
the ability to develop capital renewal programs. The ongoing asset management maturity and
development of the condition assessments and subsequent maintenance and renewal plans relies
heavily on the continued componentisation of all Stormwater Infrastructure assets within the
stormwater drainage network.
Renewal expenditure is work which does not increase the Stormwater Infrastructure design capacity
but restores, rehabilitates, replaces or renews an existing asset to its original service capacity.
Improved condition assessment data capture is currently being developed to include asset renewal
considerations based on physical conditions and estimates of remaining useful life of assets to guide
and improve renewal programs. Renewal plans are developed to maintain levels of service to ensure
assets achieve their optimal useful life before they reach the asset condition range of 5. Staff
continue to work through the various asset classes to develop renewal programs for the specific
asset classes. The Stormwater CCTV Inspection program will enable the development of a robust
renewal program for stormwater pipes and pits.
In the absence of condition data, an age-based approach to identify when Council’s Stormwater
Infrastructure will reach their useful life has been developed to determine anticipated renewals.
Priority is required across all the assets classes that have not had physical condition assessments
to develop a suite of renewal programs.
The graph below depicts the planned renewals by asset class over the next 10 years. There are
major renewals identified in years four, five and eight for stormwater assets, which is a direct
relationship of when initial asset data was collected and the construction dates of the assets were
estimated. It is expected that through physical condition assessments that this spike in renewals will
be better defined and spread over many years as the renewal program will be based on condition
and not remaining useful life.
Asset Management Plan: Stormwater Infrastructure Page 13
Section 15
As the Stormwater Infrastructure assets age, continued condition assessments are required to
monitor the assets and produce more defined renewal plans. The graph below enables Council to
identify and plan for these significant renewal activities for the next 10 years.
Figure 7: Stormwater Infrastructure Asset Renewal Costs
The above graph identifies the future investment required in renewing Stormwater Infrastructure over
a 10-year period. The development of detailed renewal programs for all stormwater assets will result
in the completion of asset condition assessments. Projects currently identified have been listed in
Annex D and is reflected in the development of Council’s future 10-year Capital Works Program.
Capital Upgrades and New Assets
There is a need to develop more maturity in the overall assessment and management of our
Stormwater Infrastructure assets before there is a consideration for further upgrades and expansion
of the Stormwater Infrastructure assets. The modelling of increased tides, rising sea levels,
increased storm intensities and other factors relating to climate change must be considered in future
modelling when upgrading or constructing major stormwater infrastructure.
In summary, the demand drivers highlighted in section 3.1 will dictate the development of capital
upgrade and new stormwater infrastructure in the future.
Capitalisation of Assets
All new and renewed assets will be acquired and commissioned in accordance with the Noosa
Council Capital Delivery Framework.
Asset Management Plan: Stormwater Infrastructure Page 14
Section 16
Disposal and Replacement of Assets Disposal of assets will be consistent with statutory and regulatory requirements. The replacement of assets will be driven from the condition assessments. The disposal and commissioning of assets from the asset register is undertaken in the capitalisation and asset write-on/off process. This process is being delivered via the Asset Management Branch and Finance Branch. Asset Management Plan: Stormwater Infrastructure Page 15
Section 17
5. Risk Management
Risk management is a coordinated approach to the management and control of risk by Noosa
Council having regard to the Council’s strategic and operational objectives.
Critical Assets
The identification of critical assets based on the consequence of failure multiplied by the likelihood
of failure; as adapted from the International Infrastructure Manual 2015 Section 3.2.4 has been
undertaken to enable the prioritization of asset management and financial resources. Stormwater
Infrastructure is identified as a critical asset to the Noosa Community and has a high asset value on
Council’s asset register. The management of Council’s Stormwater Infrastructure assets should
continue to be prioritised to ensure any significant risks are mitigated before they escalate further
and impact on the Community.
Risk Assessment
It is important to have a good understanding of the risks associated with the operation of the
Stormwater Infrastructure Assets. Council continues to develop its Stormwater Infrastructure
management activities to ensure that the Stormwater Infrastructure is meeting the intended design
life, and where necessary work on the optimised intervention for undertaking rehabilitation and
renewal activities.
The key risks associated with achieving the above objectives of Council’s Stormwater Infrastructure
management activities and associated levels of service have been identified throughout this AMP
and are outlined below:
1. Unanticipated Stormwater Infrastructure deterioration and structural failure – It’s likely that
this risk will be accelerated by the increasing severity in weather and climate change conditions
for certain stormwater assets. Predictions and events will need to be monitored closely to ensure
this risk is managed appropriately.
2. Asset Performance – Asset failures that influence the determined service levels. A complete
understanding of all Stormwater Infrastructure assets and their relevant asset condition will assist
in mitigating potential risks.
3. Asset Knowledge - The need to understand the performance of all the Stormwater Infrastructure
assets at component level is essential in mitigating risks to desired performance. Detailed
inspections and asset data are essential for informed decision-making. Assets such as bio
retention basins, end walls and structures require more detailed inspections and improved
maintenance activities to ensure assets do not become a risk to the community.
4. Funding – the ongoing operational and maintenance costs for Stormwater Infrastructure will
continue to rise and efficiencies and cost savings are reviewed regularly. Grant opportunities for
renewals/upgrades must always be considered as well as cost benefit analysis of alternative
designs and materials.
The above risks and all other current risks will be regularly reviewed by the stormwater infrastructure
working group and the high level risks documented in the annual Branch Plan – Civil Operations.
Should there be a need for them to be further escalated they can be addressed for consideration by
the Asset Management Working Group, Executive Team, and Audit and Risk Committee. To mitigate
these risks there are resulting actions from this AMP. For Council to make informed decisions, it is
understood that focus must be placed on consistent cyclical inspections across all Stormwater
Infrastructure assets with condition data accurately recorded in T1 asset management system. This
then supports the reconciling of financial asset data, GIS data and inspection data to have a single
point of truth for all Stormwater Infrastructure assets.
Asset Management Plan: Stormwater Infrastructure Page 16
Section 18
6. Financial Summary
Financial Statements and Projections
Council’s Stormwater Infrastructure plays a vital role in managing stormwater run-off across the
shire. There is 223km of piped stormwater infrastructure and over 22,000 financial Stormwater
Infrastructure assets on Council’s register, considered in this Asset Management Plan (AMP). The
Stormwater Infrastructure assets have a current replacement value of $77m, which equates to
approximately 17% of Council’s financial assets.
The operational and maintenance expenses for Stormwater Infrastructure make up approximately
4% of the $90m annual budget. The capital works program fluctuates from year to year, however,
the current 2018/19 capital works program the capital investment of $635k for Stormwater
Infrastructure equates to 2% of the $29.5m capital works program.
The annual operating plan details the financial statements and projections associated with the
operational and maintenance expenses for the Stormwater Infrastructure on an annual basis. The
capital investments including renewals, upgrades and expansions are highlighted in the annual
capital works program which is reflected in the 10-year capital works program.
Funding Strategies
The immediate improvements to funding requests for maintenance and renewals in the budget
process are now evidence based and are supported from the condition assessments that have been
carried out.
The funding strategy, key assumptions, reliability and confidence levels are detailed in the Council’s
long-term financial plan. More detailed funding strategies that promote the long-term sustainability
of the Stormwater Infrastructure will be further developed and defined in future asset management
plans.
Budget Forecasts
Budget forecasts will continue to be developed as information is captured and reported from the
Technology One (T1) financial system. Through the annual review of actuals, maintenance and
renewal activities against budget will initiate further development and identify trends that are
reportable and reflect future year forecasts.
Figure 9 identifies the current forecasts for the operational, maintenance and renewal expenses to
demonstrate the whole of life costs over a 10-year period for the Stormwater Infrastructure in the
amount of $49m. further asset renewal and maintenance activities will need to be developed over
coming years that will influence this current forecast. To achieve good asset knowledge of all
Stormwater Infrastructure assets it is important to continue with the asset data reconciliation and
physical condition assessments to make well informed asset decisions.
The Stormwater Infrastructure assets have varying useful lives for the asset classes maintained by
Council. The Stormwater Infrastructure useful lives vary based on construction, material type and
have estimated lives between 20 – 100 years.
Asset Management Plan: Stormwater Infrastructure Page 17
Section 19
Figure 8: Stormwater Infrastructure 10-Year forecasted expenditures
The ongoing development of maintenance and condition assessment activities will ensure that future
asset failure will be minimised with a “no-surprises” approach for future funding forecasts. This will
be supported through the initial development of condition monitoring to predict potential maintenance
and renewal requirements. In compiling the current forecasts the following general assumptions have
been identified.
• Proposed Capital Renewal Program will be funded in accordance with the current Council
model adopted;
• Renewal works will be prioritised according to asset condition;
• The condition of the assets reflect what is reported within this document;
• Current maintenance funding levels will meet service level requirements;
• Renewals, maintenance and isolated failure replacement is generally ‘like for like’;
• Where a renewal must be provided to a higher standard, the difference in cost between a ‘like
for like’ renewal and the higher standard is to be treated as an asset upgrade.
• Depreciation is in accordance with Council Policy;
• There is no allowance for CPI as the continuing revaluation and condition inspection process
will make adjustments for current rates.
Asset Management Plan: Stormwater Infrastructure Page 18
Section 20
7. Plan Improvement and Monitoring
Status of Asset Management Practices
Currently all Asset Management activities are managed within the Noosa Council Asset
Management Governance Framework and enabled through Technology One (T1) asset information
management system. The establishment of the stormwater infrastructure working group has acted
as an enabler for the improvement program and determines the priorities and targets that are aligned
to Council.
Improvement Program
The following initiatives are recommended:
1. Asset Inventory – Ensure that there is one single asset register/hierarchy that captures all
parent and child assets; at a level of the lowest or appropriate repairable unit. All other
duplicated asset lists/registers should be eliminated. T1 is the Enterprise Asset Management
Repository. Prior to the revaluation, it is recommended a detailed asset register and data
reconciliation project establishes a single point of truth for asset data within T1.
2. Condition Assessments – In consideration of more detailed and regular condition
assessments, priority should be given to the high value and critical assets such as bio retention
basins, structures, gross pollutant traps and open drains to ensure development of renewal
programs for individual asset classes.
3. Capital Planning – The development of upgrade programs will support maintaining the levels
of service and expectations of the community. Key demand drivers will improve prioritisation
and strategy around potential upgrades to the stormwater infrastructure.
4. Asset Systems – There is an initial implementation of operational work orders for planned,
reactive work and inspections to date. There are a number of functions of the T1 system that
would improve the operational and maintenance activities and further improve the asset
management objectives of the organisation. These include:
i. Planned maintenance work orders;
ii. Costings via work orders;
iii. Inspections and defects logged within T1;
iv. Asset performance reporting from T1;
v. Data capture – asset validation and updating.
5. Renewal Plans - The establishment of renewal plans for all assets considered in this AMP is
considered essential to achieving good asset management outcomes. Renewal plans are
based on understanding the condition of Council’s assets and modelling to ensure that the
intervention for renewal achieves the assets useful life. The establishment and review of these
renewal plans will be a focus for the Stormwater Infrastructure Working Group to develop and
implement into Council’s processes and procedures.
6. Maintenance Plans – Plans must be regularly reviewed and incorporated into the annual
budget process. Continued inspections and recording of asset condition and maintenance
activities are key to achieving this initiative. This will be a key outcome for the Stormwater
Infrastructure Working Group to develop and review the Stormwater Infrastructure
maintenance plan for all the assets considered in this AMP.
Asset Management Plan: Stormwater Infrastructure Page 19
Section 21
Monitoring and Review Processes for the Asset Management Plan
This first edition of AMP for the Stormwater Infrastructure refers to current levels of service that have
existed over recent years. This AMP is to be a ‘living’ document reflecting actual practices used in
managing the Stormwater Infrastructure. In accordance with this, Council will balance cost, risk and
performance needs for the Stormwater Infrastructure.
The AMP will have a high-level annual review for developing the annual budget from the
maintenance and renewal plans. A full document review will occur on a three-year cycle, in line with
the completion of detailed condition assessments and the financial asset revaluation of the
Stormwater Infrastructure assets.
Asset Management Effectiveness
The effectiveness of this AMP will be measured in terms of:
1. Adoption of the Stormwater Infrastructure AMP by Council.
2. The ongoing development of good asset knowledge through a commitment to recording
information against assets and undertaking cyclic condition assessments at the facility.
3. Maintenance and renewal plans that are robust and initiate the annual budget process.
4. Historical asset activities that are recorded and located in Council’s asset management
system.
5. Limited reactive work and more planned maintenance activities.
6. The Stormwater Infrastructure AMP becomes the reference point for all information and
enables good decision making for asset related activities and investments.
Asset Management Plan: Stormwater Infrastructure Page 20
Section 22
8. ANNEX A: Levels of Service
STORMWATER DRAINAGE & FLOOD MITIGATION SERVICE LEVEL CATALOGUE
Service Output Provision and maintenance of a stormwater drainage network and
other measures to minimise impacts to the road transport network,
infrastructure, private property and the environment.
Service Activity The activities include regular inspections and routine works to
(Maintenance) ensure drainage lines are free flowing, that the impact of
contaminants being washed into the ocean/waterways is
minimised, that flood mitigation measures perform to design
criteria and that accurate information is available to respond to
flooding events.
Responsible Area2 Department Branch
Infrastructure Services Civil Operations (Civil Works &
Maintenance)
Asset Management (Flood
alert/gauges)
Cost Centres Drainage 2005
Asset Management & Service 2105 (Flood Alert Stations / Height
Programming Gauges only)
Department Management – 1900
Director Infrastructure Services
Management Civil Operations 2000
Works Operations Coordination 2021
Works Operations 2704
Key Statistics3 Stormwater Drainage assets 22,830 items
Length of stormwater drainage 281 km
network
Stormwater Quality Improvement 18 (major)
Devices’s (SQID’s - include gross 44 (minor installations)
pollutant traps, pit baskets, trash
racks etc.)
Stormwater bio-retention basins 46
Flood Alert Towers/structures 22
Flood Alert Stations (tower in 23
Pomona has 2 stations on
structure)
Flood Alert - Repeater hardware - 1
Mt Wolvi
Food Alert - Telemetry receiver 1
hardware
Flood Maximum Height Gauges 46
Legislative responsibility to None.
provide this service
ACTIVITY SERVICE LEVEL TARGET
Stormwater system maintenance & operations
[Includes inspections and routine maintenance/repairs of culverts, pipes, inlet pits & outlets, subsoil
drains, open channels, retardation basins, retention basins and gross pollutant traps to ensure the
stormwater drainage network is operating effectively]
2
Refer to Asset Responsibility Matrix for specific areas of responsibility
3
Source Stormwater Asset Management Plan adopted 22 October 2015 – data subject to further validation.
Asset Management Plan: Stormwater Infrastructure Page 21
Section 23
9. ANNEX B: Stormwater Infrastructure
Stakeholders
The internal and external stakeholders for the Stormwater Infrastructure are detailed below:
Role Function
Internal
Council Staff Council officers play a major role in managing assets to ensure that they
provide a level of service that meets the needs of both residents and
visitors to the area. Council officers implement the components identified
in the Stormwater Infrastructure asset management plan.
Elected Council Officers This stakeholder group includes Councilors and the Mayor for the Council.
They are primarily responsible to ensure that their decisions represent and
reflect the needs of the wider Noosa community.
Stormwater Infrastructure Provides technical advice to improve decision making across all internal
Working Group stakeholders. The group must ensure the asset management planning
covers the whole of life and optimally balances cost, risk and performance
of the Stormwater Infrastructure where possible.
Asset Manager Infrastructure Services Director responsible for Infrastructure Services
branch management.
Civil Operations Responsible for the day-to-day operations and maintenance activities and
delivering the maintenance and operational programs.
Asset Planning Manager Responsible for the condition assessments in developing renewal
programs.
Finance Ensures that the appropriate level of financial information is made
available to Infrastructure Services branch management.
External
Community & Residents Residents are the core users of Stormwater Infrastructure. Their needs,
wants and expectations are conveyed to Council, which should be
reflected in the levels of service for maintaining a good drainage network.
Councils Insurer Ensures that all insurance and risk are adequately addressed.
Visitors Visitor’s wants, needs and expectations drive the development in areas of
the highest tourism usage.
It is important that the defined roles have the capability and capacity within their management
responsibility to make good on the responsibilities assigned to them. From stakeholder discussions
held during development of the Asset Management Improvement Roadmap, some of these
responsibilities may be centralised in the first instance and then transferred to other parts of the
Organisation when the appropriate capability and/or capacity is developed.
Asset Management Plan: Stormwater Infrastructure Page 22
Section 24
10. ANNEX C: Document Management Document Owner Revision Date Document Owner Date Approved 1.0 01/12/18 Asset Planning Manager Document History Revision Date Reviewed By Approved By Date Approved 1.0 01/02/2019 Asset Planning Manager Asset Planning Manager Distribution of Copies Revision No. of Copies Issued to 1st draft 1 x electronic copy Asset Planning Manager Noosa Council Associated Asset Management Documents Document Date Approved By Strategic Asset Management Plan (SAMP) 2017 Council Noosa Council Asset Management Roadmap 2016 Council Abbreviations Abbreviations Meaning AM Asset Management AMP Asset Management Plan CA Condition Assessment ISO International Standards Organisation KPI Key Performance Indicators (LoS) Level of Service SAMP Strategic Asset Management Plan Proposed Amendments No Section Proposed Amendment Asset Management Plan: Stormwater Infrastructure Page 23
Section 25
11. ANNEX D: Stormwater Infrastructure 10-Year Capital Works
Program
Program Budget Year Description LifeCycle Project Total
Asset Management 2019/2020 Shire CCTV Drainage program Renewal $ 200,000
Stormwater Drainage 2019/2020 Noosaville Industrial Area Stormwater Quality Improvement Device Expansion $ 250,000
Stormwater Drainage 2019/2020 Shire Bioretention Basin Renewals Program Renewal $ 80,000
Stormwater Drainage 2019/2020 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 150,000
Stormwater Drainage 2019/2020 Shire Pit Structure Renewal Program Renewal $ 150,000
Stormwater Drainage 2019/2020 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Stormwater Drainage 2019/2020 Noosaville Project Ave Stormwater Drainage Easement Upgrade Upgrade $ 250,000
Asset Management 2020/2021 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2020/2021 Shire Bioretention Basin Renewals Program Renewal $ 100,000
Stormwater Drainage 2020/2021 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 250,000
Stormwater Drainage 2020/2021 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2020/2021 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2021/2022 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2021/2022 Shire Bioretention Basin Renewals Program Renewal $ 150,000
Stormwater Drainage 2021/2022 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 150,000
Stormwater Drainage 2021/2022 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2021/2022 Shire Kerb & Channel Renewal Program Renewal $ 130,000
Stormwater Drainage 2021/2022 Shire Stormwater Drainage Trunk Network Upgrade - LGIP Upgrade $ 515,000
Asset Management 2022/2023 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2022/2023 Shire Bioretention Basin Renewals Program Renewal $ 80,000
Stormwater Drainage 2022/2023 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 250,000
Stormwater Drainage 2022/2023 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2022/2023 Shire Kerb & Channel Renewal Program Renewal $ 130,000
Asset Management Plan: Stormwater Infrastructure Page 24
Section 26
Program Budget Year Description LifeCycle Project Total
Stormwater Drainage 2022/2023 Shire Stormwater Drainage Trunk Network Upgrade - LGIP Upgrade $ 307,000
Asset Management 2023/2024 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2023/2024 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2023/2024 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2023/2024 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Stormwater Drainage 2023/2024 Noosa Heads Cooyar St (opposite Wyandra) Upgrade Bio Retention Upgrade $ 466,579
System
Asset Management 2024/2025 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2024/2025 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2024/2025 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2024/2025 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2025/2026 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2025/2026 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2025/2026 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2025/2026 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2026/2027 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2026/2027 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2026/2027 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2026/2027 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2027/2028 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2027/2028 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2027/2028 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2027/2028 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2028/2029 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2028/2029 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2028/2029 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2028/2029 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management 2029/2030 Shire CCTV Drainage program Renewal $ 150,000
Stormwater Drainage 2029/2030 Shire Pipe Re-lining / Rehabilitation Renewal Program Renewal $ 200,000
Stormwater Drainage 2029/2030 Shire Pit Structure Renewal Program Renewal $ 100,000
Stormwater Drainage 2029/2030 Shire Kerb & Channel Renewal Program Renewal $ 100,000
Asset Management Plan: Stormwater Infrastructure Page 25
Section 27
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