21.7 Scheme Assets
A summary of material and diameter for pipes in Southbridge is shown below.
Figure 21‑5 Pipe Material – Southbridge
Figure 21‑6 Pipe Diameter – Southbridge
21.8 Operational Management
The water supply is operated and maintained under two maintenance contracts as follows:
- Contract 1241: Water Services Contract. Contract is with SICON who undertakes investigations, conditions inspections, proactive and reactive maintenance and minor asset renewals; and
- Contract 1202: Parks and Reserves Contract. Contract is with SICON who undertakes the maintenance of land scape features related to water services e.g. mowing, gardens etc.
Water quality sampling is completed under an agreement with Food and Health Ltd as required.
21.9 Photos of Main Assets
Photo 1: Taiaroa Street Control Building
| Photo 2: High Street Well head (below covers)
|
Photo 3: St Johns St Treatment Plant and Bore
| |
21.10 Risk Assessment
A risk assessment has been undertaken for the Southbridge scheme. The key output from the risk assessment is the identification of any extreme and high risks which need to be mitigated. In order to mitigate these risks they have been included and budgeted for in the projects within this LTP. Table 21‑7 outlines the risk priority rating, Table 21‑8 outlines the risks and the list of key projects is found in Table 21‑13.
Table 21‑7 Risk Priority Rating
>50 | Extreme | Awareness of the event to be reported to Council.
Urgent action to eliminate / mitigate / manage the risk.
Document risk and action in the AMP.
|
35-50 | Very High | Risk to be eliminated / mitigated / managed through normal business planning processes with responsibility assigned.
|
14-35 | High | Manage risk using routine procedures.
|
3.5-14 | Moderate | Monitor the risk.
|
<3.5 | Low | Awareness of the event to be reported to Council.
Immediate action required to eliminate / mitigate / manage the risk.
Document risk and action in the AMP.
|
Table 21‑8 Risks – Southbridge
Wells not run for extended periods of time | Auto well turnover | 2014 | 20 | 20 | 20 |
Electrical failure due to lightning or network spikes | Install surge diverters | 2014 | 20 | 20 | 20 |
Failure to meet NES water meter standards | NES Water Meter Compliance | 2014 | 20 | 6 | 6 |
Inability to collect income from non-metered properties | Install property water meters | 2014 | 27 | 27 | 2.1
|
Non-consented activities | Renewal of consents | 2014 | 27 | 27 | 6 |
Inadequate capacity into the future | Capacity upgrades | 2017 |
| 20 | 6 |
The list of district wide risks can be found in 5Waters Activity Management Plan: Volume 1.
21.11 Asset Valuation Details
The total replacement value of assets within the Southbridge water scheme is $2,589,558 with further details in Table 21‑9 below.
Table 21‑9 Replacement Value, Southbridge
Plant and Equipment | $385,615
|
Water Reticulation
| Hydrant | $93,234
|
Lateral | $75,135
|
Pipe | $1,554,645
|
Supply Point | $400,841
|
Valve | $80,088
|
21.12 Renewals
The renewal profile has been taken from the 2019 5 Waters Valuation. The majority of renewals occur in 2033/2034.
Figure 21‑7 Southbridge Water Renewal Profile
21.13 Critical Assets
The criticality model for Southbridge has been updated for the 2021 AcMP. The methodology of the criticality model can be found in 5Waters Activity Management Plan: Volume 1 and it provides details of how the criticality has been calculated for the reticulation assets. Table 21‑10 and Figure 21-8 below show the calculated criticality for all of the assets within this scheme that have a recorded known length.
Table 21‑10 Length of Assets per Criticality Level
5
| Low | 9,584
|
4
| Medium-Low | 4,566
|
3
| Medium | 516
|
2
| Medium-High | 818
|
1
| High | 0
|
21.14 Asset Condition
The asset condition model was run for Southbridge in 2021. The methodology of the model can be found in 5Waters Activity Management Plan: Volume 1 which provides details of how the model has been calculated for the pipe reticulation assets. Figure 21‑9 below shows the level of asset condition for these assets within this scheme that have a recorded known condition.
Table 21‑11 provides a description of the condition rating used within the condition model.
Table 21‑11 Asset Condition Grading
1.0
| Excellent |
2.0 | Good |
3.0 | Moderate |
4.0 | Poor |
5.0+ | Fail |
The number of pipe faults is also measured through the asset management system. Figure 21‑10 shows the known historic pipe failures within this scheme.
21.15 Funding Program
The 10 year budgets are shown by Table 21-12. Budgets are split into expenditure, renewals, projects and capital projects. Expenditure and renewals have been reported on a district-wide basis in Volume 1.
All figures are ($) not adjusted for CPI “inflation". They are calculated on historical data, and population growth where relevant.
Table 21-12 Budget Summary
2021/2022 | -
| $169,645
|
2022/2023
| $12,000
| -
|
2023/2024 | -
| -
|
2024/2025 | -
| -
|
2025/2026 | -
| -
|
2026/2027 | -
| $31,358
|
2027/2028 | -
| - |
2028/2029
| -
| -
|
2029/2030
| -
| -
|
2031/2032
| -
| -
|
Total | $12,000
| $201,003
|
An explanation of the categories within the budgets are as follows below:
-
Expenditure consists of operation and maintenance costs;
-
Renewals are replacement of assets which are nearing or exceeded their useful life;
-
Projects are investigations, decisions and planning activities which exclude capital works; and
-
Capital projects are activities involving physical works.
Table 21-13 Key Projects
Capital Projects
| 407790037
| Southbridge growth
| $129,645
| -
| -
| $31,358
| 100% G
|
Capital Projects
| -
| Upgrading of storage and addition of 2 reservoirs
| $20,000
| -
| -
| -
| TBC
|
Capital Projects
| -
| Additional pressure sensors added to network
| $20,000
| -
| -
| -
| 100% LoS
|
Projects
| -
| Investigations: review of plastic tank lid design; investigate water loss; flush tanks
| $12,000
| -
| -
| -
| 100% LoS
|
* Where LoS refers to Level of Service and G refers to Growth
The list of district wide projects can be found in 5Waters Activity Management Plan: Volume 1.
Discussion on Projects
Projects have been determined based on their:
- Relevance to the scheme
- Requirement to be completed under legislation
- Ability to bring the scheme up to or maintain the Level of Service required under council's Asset Management Policy.
Many projects are jointly funded by more than one scheme and activity. Each scheme pays a pro-rata share only, equivalent to the number of connections.
Discussion on Capital and Projects
Where relevant, Capital (Levels of Service) and Capital (Growth) projects have been included in the scheme financial details.
Levels of Service Projects and growth splits have been provided to ensure the costs of population driven works are clear.
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