2019-02-12 Attachment 1 to Item 3 - Stormwater Infrastructure Asset Management Plan

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