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PATTLE DELAMORE PARTNERS LTD

Consent Variation to Take and Use Groundwater – Assessment of Environmental Effects

Hurunui District Council

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Consent Variation to Take and Use Groundwater - Assessment of Environmental Effects

• Prepared for Hurunui District Council

• April 2019

PATTLE DELAMORE PARTNERS LTD 295 Blenheim Road Tel +64 3 345 7100 Fax +64 3 345 7101 Upper Riccarton, Christchurch 8041 Website http://www.pdp.co.nz PO Box 389, Christchurch 8140, New Zealand Auckland Tauranga Wellington Christchurch

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Table of Contents

SECTION PAGE

1.0 Introduction 1

2.0 Description of Proposal 2

3.0 Planning Assessment 2 3.1 Resource Management Act 1991 2

4.0 Assessment of Environmental Effects 3

5.0 Proposed Consent Conditions 5

6.0 Consultation 5

7.0 Section 104 – Planning Matters 5 7.1 National Environmental Standards 6 7.2 National Policy Statement for Freshwater Management (NPS-FM) 7 7.3 Canterbury Water Management Strategy 7 7.4 Canterbury Regional Policy Statement 8 7.5 Canterbury Land and Water Regional Plan 9 7.6 Waimakariri District Plan 10 7.7 Hurunui District Plan 11 7.8 Iwi Management Plans 12

8.0 Part 2 of the Resource Management Act 13

9.0 Notification 14

10.0 Conclusions 14

11.0 References 15

Table of Tables

Table 1: CRC161302 Abstraction Rates 4

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Appendices

Appendix A: Location of Bore Field

Appendix B: Consent CRC161302

Appendix C: Example Hydrograph

Appendix D: Water Supply Asset Management Strategy

Appendix E: Water Restriction Management

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1.0 Introduction

Pattle Delamore Partners Ltd (PDP) has been engaged by Hurunui District Council (HDC) to prepare an assessment of environmental effects arising from a consent variation to take groundwater from a bore field on the north bank of the Ashley River near Ashley Township, North Canterbury. Consent CRC161302 authorises HDC to take up to 70 L/s (6,000 m3/day) from seven shallow bores to supply potable water for the Ashley Area. Condition 4 of this consent and the associated water supply asset management strategy (attached to the consent) sets out measures to reduce the rate of take at certain trigger levels. The water supply asset management strategy for this consent defines four levels of restriction and at each level specific demand management measures are required. Community water supplies are not required to comply with the environmental flow and allocation regime provided a water supply strategy is in place and the water supply is managed so as to restrict the use of water from those supplies during periods of low flow. The four levels of restriction specified in the consent represent a range of flow conditions and require HDC to implement measures not just at low flows but also at higher flow levels. In addition, HDC have indicated that during some periods of the year Restriction Levels can change rapidly from day to day which makes it impractical (if not impossible) to implement the required measures at each trigger level. This consent variation proposes to remove some of the trigger levels specified in consent CRC161302. It is proposed to retain the low flow trigger level based on the A-block minimum flow for the Ashley River. No other changes are proposed to consent CRC161302. This consent variation has been prepared on behalf of HDC by PDP and includes:

• Details of the proposed consent variation; • A description of relevant legal and planning matters; • A description of the existing environment; • An Assessment of Environmental Effects; The location of the bore field near the Ashley River is shown in Appendix A (Figure 1) and a copy of consent CRC 161302 is included in Appendix B. A copy of the HDC water supply asset management strategy is included in Appendix D which describes how water usage will be reduced at times of low flow.

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2.0 Description of Proposal

As discussed in Section 1.0 HDC proposes to simplify/rationalise the number of Restriction Levels currently specified in the consent. The current Restriction Levels specified in the attachment of the consent (refer to Appendix B) are based on the A- B- and C-block minimum flows as specified in Table 7 of the Canterbury Land and Water Regional Plan (CLWRP). Restrictions for the Ashley River are based on the flow recorded by ECan at the Ashley Gorge. A hydrograph for the Ashley River at the Gorge along with the different trigger levels specified in the water supply asset management strategy is included in Appendix C. This graph indicates that Restriction levels can change rapidly from day to day. For example, on 4 February 2018 there would have been no restrictions, with Level 1 restriction required on 5 February, Level 2 restrictions on 6 February and Level 3 restrictions on 8 February 2018. Thereafter, Level 1 restrictions would have applied on 12-13 February, and subsequently Level 3 restrictions from 14 February. Looking at the water restrictions management table this would have required a whole range of demand management measures to be put in place and changed over a very short period of time as well as continuous changes in the communication with the public via a range of communication methods (refer to final page on Appendix B). In summary at times of rapidly changing flow compliance with the consent is impractical if not impossible. In summary HDC proposes to remove condition 4(a) of consent CRC161302 and replace the “Water Restriction Management” outlined in Schedule CRC161302. The updated schedule is attached in Appendix E. It is considered that no other changes are required to the consent. Condition 5 c. allows for amendments to the “Water Restriction Management’’ detailed in Schedule CRC161302. The changes to the ‘’Water Restriction Management’’ schedule also include minor changes to the wording under column ‘’Demand Management During Restriction’’ and ‘’Method of Communication’’. For consistency the wording in the schedule has been updated to be in line with the wording in consent HDC consent CRC154223 (Balmoral Rural Water Supply).

3.0 Planning Assessment 3.1 Resource Management Act 1991 Section 14(2) of the RMA states that no person may take or use water unless it is allowed by Subsection (3). Subsection 14(3) states that a person is not prohibited by Subsection (2) from taking or using water if it is “expressly allowed by a national environmental standard, a rule in a regional plan as well as a rule in a proposed regional plan for the same region (if there is one), or a resource consent”.

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The Applicant holds resource consent CRC161302 to take groundwater. It is proposed to vary the conditions of CRC161302, as outlined in Section 1.0. With respect to consent variations, Section 127 of the RMA states that: (3) “Sections 88 to 121 apply, with all necessary modifications, as if a. the application were an application for a resource consent for a discretionary activity; and b. the references to a resource consent and to the activity were references only to the change or cancellation of a condition and the effects of the change or cancellation respectively.” Therefore, the variation to CRC161302 is to be processed as a discretionary activity, and the consent authority is limited to assessing the difference in effects between the existing consented activity, and the effect (if any) of the change in activity.

4.0 Assessment of Environmental Effects

The proposed variation to consent CRC161302 held by HDC constitutes mainly a change to bring the Restriction Levels in line with typical Restriction Levels for community supplies throughout Canterbury. Community supplies are generally only required to implement measures which reduce the take of water below the A - block minimum flow and not at higher (B- or C- block) minimum flow levels. For example the Water Restriction Management for the Balmoral Rural Water Supply specified in consent CRC154223 only requires HDC to implement measures to reduce water use when flows are below the A-block minimum flow. Bowden Environmental (2015) assessed the stream depletion effect of the bore field on the Ashley River and classified the stream depletion effect as ‘high’. As such minimum flow conditions are required for the consent. The current conditions of CRC161302 include minimum flow restrictions which are based on the A, B and C block minimum flows. The various restriction levels and corresponding flow rates in the Ashley River are summarised below in Table 1. The maximum consented abstraction rate under CRC161302, i.e. 70 L/s, is also expressed as a percentage of the river flow for the various restriction levels.

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Table 1: CRC161302 Abstraction Rates

Restriction Flow Rates in Ashley Max. consented River1 take as % of river flow

Level 1 (C block min. flow) 3,700 – 6,000 L/s 1.2 - 1.9%

Level 2 (Gap between C and B 3,200 to 3,700 L/s 1.9 – 2.2% blocks)

Level 3 (B block min. flow) 2,500 – 3,200 L/s 2.2 – 2.8%

Level 4 (A block min. flow) < 2,500 L/s > 2.8%

Notes: 1. Flow rates trigger levels based on January to July flow restrictions.

The proposed change will ensure that the “water restrictions management” is practical and can be implemented and complied with by HDC. The measures proposed in the updated Water Restriction Management schedule (Appendix E) are in line with the most severe measures specified in the “water restrictions management schedule” (Level 4 critical risk) of the current consent. As such, the effect of the water take on Ashley River flows are minimised as much as possible during times of critical low flow periods. These critical low flow periods are when the ecology of the river is likely to be under the highest level of stress due to conditions such as reduced water depth, high water temperatures, low Dissolved Oxygen (DO) and algal growth. During these periods the water restriction management measures (as per Appendix E) are unchanged. As such, during these times there will be no effect as a result of this consent variation. At higher flows, i.e. when the river flow corresponds to the Level 1-3 restrictions, the maximum consented take (70 L/s) only makes up a small percent of the river flow, as per Table 1. The savings in water abstractions potentially achieved by the Level 1-3 restrictions would represent an even smaller fraction of the river flow. In other words, removing the requirement to implement water saving measures at flows between 2,500 and 6,000 L/s (refer to Table 1) has a negligible effect on river flows as such at these higher flows negative effects on instream ecology are not expected. Based on these considerations it is considered that the environmental effects of the consent variation are less than minor. It is noted that it is anticipated that there are no groundwater effects associated with the proposal. The original application (Bowden Environmental, 2015) which formed the basis of the decision for the current consent (CRC161302) assessed the well interference effects based on 365 days of pumping at the maximum volume over the entire year. As such the proposed change is within the effects already assessed in the original application which was based on a conservative

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well interference assessment. In addition there is no change sought in the maximum annual volume.

5.0 Proposed Consent Conditions The proposed variation seeks to remove Condition 4a. No further changes are sought, as Condition 5 c allows for amendments to be made to the “Water Restriction Management” as outlined in Schedule CRC161302.

6.0 Consultation

The proposal was discussed in a meeting with ECan staff (David Just and Dylan Marriott) on 24 October 2018. The practicalities of the current consent were discussed along with the requirements for the consent variation. As the effects are considered less than minor, no other parties were consulted.

7.0 Section 104 – Planning Matters Section 104 of the Resource Management Act 1991 (RMA) states: (1) Subject to Part II, when considering an application for a resource consent and any submissions received, the consent authority shall have regard to:- (a) Any actual and potential effects on the environment of allowing the activity; (b) Any relevant regulations; (c) Any relevant National Policy Statement, New Zealand Coastal Policy Statement, Regional Policy Statement, and Proposed Regional Policy Statement; (d) Any relevant objectives, policies, rules, or other provisions of a regional plan or proposed regional plan; (e) Any relevant District Plan or Proposed District Plan, where the application is made in accordance with a Regional Plan; (f) Any relevant Regional Plan or Proposed Regional Plan, where the application is made in accordance with a District Plan; (g) Any relevant Water Conservation Order or Draft Water Conservation Order; (h) Any relevant designations or Heritage Orders or relevant requirements for designations of Heritage Orders; and (i) Any other matters the consent authority considers relevant and reasonably necessary to determine the application.

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Actual or potential effects of the proposed variation have been considered in Section 4.0 of this report. The following sections consider the actual and potential effects of the proposed changes, the National Policy Statement for Freshwater Management, the Canterbury Water Management Strategy, the Canterbury Regional Policy Statement, the relevant objectives and policies LWRP, and the Iwi Management Plans. There are no relevant Water Conservation Orders or Draft Water Conservation Orders, Heritage Orders or relevant requirements for designations of Heritage Orders relevant to this application. 7.1 National Environmental Standards

7.1.1 National Environmental Standards for Sources of Human Drinking Water Regulations 2007 The purpose of the National Environmental Standards (NES) for Sources of Human Drinking Water Regulations 2007 is to reduce the risk of contamination of drinking-water sources. It requires Regional Councils to consider the effects of certain activities on drinking-water sources. The proposal is to vary conditions to CRC161302. This consent allows for the abstraction of groundwater from seven bores for a community water supply operated by HDC. The proposal is not considered to adversely affect a drinking water source and therefore is considered to be consistent with the NES.

7.1.2 National Environmental Standard for Measurements and Reporting of Water Takes 2010 The purpose of the NES for Measurement and Reporting of Water Takes is to accurately measure and record water takes so that water resources can be effectively allocated and efficiently used. The regulations came into effect on 10 November 2010. Water metering conditions are already included in CRC161302 and as such it is considered that the proposal is in line with the NES for measurement and Reporting of Water Takes

7.1.3 National Environmental Standard for Ecological Flows and Water Levels 2008 The proposed National Environmental Standard on Ecological Flows and Water Levels (2008) is currently on-hold pending decisions on the Government’s freshwater reform programme, and as such this proposed NES is not considered relevant to this application.

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7.2 National Policy Statement for Freshwater Management (NPS- FM) This national policy statement sets out objectives and policies that direct local government to manage water in an integrated and sustainable way, while providing for economic growth within set water quantity and quality limits. The issues covered by the NPS-FM, including water quality, water quantity and integrated management. Part A addresses water quality, and Part B water quantity. The latter includes objectives to safeguard the life supporting capacity of ecosystems, manage water sustainably, avoid over-allocation of fresh water, improve efficient use of water, and enable communities to provide for their economic wellbeing whilst managing water quantity sustainably. As discussed in Section 4.0 of this report, the proposed variation will continue to restrict water usage when river flows are below the minimum flow limits for A permits, and the effect of the proposed variation is considered to be less than minor. As such, the proposal is considered to be in line with the objectives and policies of the NPS-FM. 7.3 Canterbury Water Management Strategy On 12 April 2010, the Environment Canterbury (Temporary Commissioners and Improved Water Management) Act 2010 went into effect. Section 63 of this Act directs Environment Canterbury to have particular regard to the visions and the principles of the Canterbury Water Management Strategy (CWMS) when considering any proposed regional policy statement or plan. The CWMS was notified in November 2009 and was developed to help manage Canterbury’s water resources, as they are deemed vitally important to the region and to the nation. Lakes, rivers, streams and aquifers are used for hydro electricity generation, agricultural production and drinking water, as well as for a range of customary and recreational uses. The desired outcome of the CWMS is: “To enable present and future generations to gain the greatest social, economic, recreational and cultural benefit from our water resources within an environmentally sustainable framework.” This vision includes the outcome that water users will have reliable access to water. CRC161302 allows HDC to abstract groundwater from seven bores for a community water supply. The proposed variation will continue to be in accordance with Table 7 allocation limits of the LWRP, with restrictions in place when river flows are below in the A permit minimum flows specified in Table 7. The abstracted water will continue to provide a source of water for potable water, domestic use and stock water for the community. As discussed in Section 4.0, the effect of the proposed variation is considered to be less than minor. The proposal is considered to be in line with the desired outcome of the CWMS.

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7.4 Canterbury Regional Policy Statement The Canterbury Regional Policy Statement (CRPS) provides an overview of the resource management issues specific to the Canterbury region. Within CRPS are the objectives, policies and methods to achieve integrated management of natural and physical resources for Canterbury. Chapter 7 Fresh Water aims to maintain fresh water standards and methods for improvement. Objective 7.2.1 aims to have the region’s freshwater resources managed sustainably to enable people and communities to provide for their social- wellbeing through abstracting and/or using water providing that (1) the life- supporting capacity of fresh water is safe-guarded and (3) any actual or reasonably foreseeable requirements for community are provided for. Objective 7.2.2 recognises parallel processes for managing water and states that the abstraction of water and development of water infrastructure in the region occurs in parallel with (1) improvements in the efficiency with which water is allocated for abstraction, the water it is abstracted and conveyed, and its application or use; and (2) the maintenance of water quality where it is of a high standard. Objective 7.2.3 states that the overall quality of freshwater in the region is to be maintained or improved and its life supporting capacity be safeguarded. Objective 7.2.4 promotes the integrated management of freshwater resources and aims to sustainably manage the resource within and across catchments, between activities and between agencies and people with interests in water management in the community. Policy 7.3.4 addresses water quantity and states that the abstraction of surface water and groundwater be managed by establishing environmental flow regimes and water allocation regimes. Policy 7.3.6 is to establish and implement minimum water quality standards for surface water and groundwater resources in the region, which are appropriate for each water body. Policy 7.3.8 aims to improve the efficiency in the allocation and use of freshwater by ensuring that the infrastructure used to reticulate and apply water is highly efficient for any new take. Policy 7.3.9 seeks to require integrated solutions to the management of fresh water by developing and implementing comprehensive management plans which address the policies of the CRPS. CRC161302 allows HDC to abstract groundwater from seven bores for a community water supply. The proposed variation includes implementing

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restrictions (see Appendix E) when river flows are below in the A permit minimum flows specified in Table 7. A Water Supply Strategy has been prepared in accordance with Schedule 25 of the CLWPR, which includes measures for seeking to increase efficiency, reduce losses and implement demand management measures for reducing water consumption. As discussed in Section 4.0, the effect of the proposed variation is considered to be less than minor. The proposal is considered to be in line with the objectives and policies of the CRPS. 7.5 Canterbury Land and Water Regional Plan

The CLWRP provides objectives, policies and rules relating to the management of regional land and water resources in Canterbury. The proposed activities are considered to be in general accordance with the objectives and policies of the CLWRP.

7.5.1 Objectives Objective 3.4 seeks to provide a regional network of water storage and distribution facilities to provide for sustainable, efficient and multiple uses of water. Objective 3.8 seeks to manage the quality and quantity of water in fresh water bodies and their catchment so that the life-supporting capacity of ecosystems is protected. Objective 3.8A aims to enable high quality fresh water to be available to meet actual and reasonably foreseeable needs for community drinking water supplies. Objective 3.9 requires that abstracted water is shown to be necessary and reasonable for its intended use and that any water that is abstracted is used efficiently. Objective 3.10 requires that water is available for sustainable abstraction or use to support social and economic activities, and Objective 3.13 requires that groundwater resources remain a sustainable source of high quality water which is available for abstraction while supporting base flows or levels in surface water bodies. Water abstracted under CRC161302 is used as a community water supply and for stock drinking water purposes. As per the proposed consent conditions, when the river flow falls below the minimum flows for the A block permits, restrictions will be in place as specified in the consent conditions. In addition, a Water Supply Strategy has been prepared which includes measures to conserve water, increase efficiency and reduce water losses, and a demand management strategy. The effect of the proposed variation to CRC161302 has been assessed

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to be less than minor. It is on this basis that it is considered the objectives of the LWRP are met.

7.5.2 Policies Policies 4.1 to 4.8 provide strategic policies for the Canterbury region. Policy 4.2 seeks to meet the water quantity limits set in Sections 6 to 15 (in particular, Section 8, in particular the Table 7 Ashley River/Rakahuri Environment Flow and Allocations Limits). Policy 4.5 seeks to manage water bodies to protect water quality and safeguard the life-supporting capacity of ecosystems, and provide for community drinking-water supplies and stock water. The proposed consent conditions specify that restrictions will apply when the minimum flow requirements are not met. Furthermore, the abstracted water is for a community supply, and therefore the proposal is considered to be consistent with the strategic policies. Policies 4.23 to 4.23B seek to protect sources of drinking-water. CRC161302 allows for the abstraction of groundwater from seven bores for a community supply, and these bores already have community drinking water protection zones; the proposed variation does not seek to change this. Therefore these policies are not relevant to the variation. Policies 4.49 to 4.64 address water abstraction. Most relevant to the application is Policy 4.49, which enables the taking of water for a community supply by not requiring any minimum or residual flow or partial restriction conditions, or the environmental flow and allocation regime or groundwater allocation limit, provided that a Water Supply Strategy is in place in accordance with Schedule 25. A Water Supply Strategy is included with the application, which includes measures to restrict the use of water during periods of low flow. It is noted that as per the assessment in Section 4.0, the effect of the proposed variation is considered to be less than minor. The proposal is considered to consistent with these policies. 7.6 Waimakariri District Plan Section 19 of the Waimakariri District Plan addresses Cross Boundary Issues, and Section 19.2.3 specifically relates to the boundary with the Hurunui District. Issues identified in this section include activities occurring at or along the boundary that affect the functioning of water catchments that cross the boundary (19.2.3 d); the provision of, and effect of utilities crossing the territorial boundary (19.2.3 f); and activities that could affect the quality and quantity of potable water available for reticulation to residents of the Hurunui District via the Ashley Rural Water Supply (19.2.3 i) Issue 19.2.3 d) references Policy 3.2.1.1, which seeks to avoid, remedy or mitigate adverse effects of land use on water quality, the natural character and

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ecosystems of water bodies and their margins, fish habitat, amenity and recreational values, mahinga kai, wāhi taonga and the mauri of water. Issue 19.2.3 f) references Policy 11.1.1.1, which requires that utilities maintain or enhance a community’s social, economic and cultural wellbeing, while contributing to a safe environment, and promote the efficient use of resources so that resources are conserved and used in a sustainable manner. It is considered that the proposed variation is consistent with this policy. While the proposal is not for a land use activity, it is noted that the proposed variation to CRC161302 has been assessed as having a less than minor effect, and therefore is not inconsistent with the objectives of this policy. In 2015, a resource consent application was submitted and granted for the partial transfer of 30 L/s from a Waimakariri District Council consent to HDC; that additional water is included in CRC161302. The proposed variation to CRC161302 has been assessed as having a less than minor effect. Consent conditions will continue to include restrictions for when the river flows are below A permit minimum flows. Water abstracted under this consent will continue to be used for potable water, domestic use and stock water for the community supplied by the Ashley Main. It is therefore considered that the proposal is consistent with the District Plan. 7.7 Hurunui District Plan

While the groundwater abstraction points for CRC160302 are located within the Waimakariri District, a brief consideration of the Hurunui District Plan has been included for completeness given that water abstracted under CRC160302 supplies water to Ashley Main supply area (located in the Hurunui District). Section 9 of the Hurunui District Plan relates to utilities. Objective 9 seeks to provide utilities that meet the needs of today’s communities and the reasonable foreseeable needs of future generations, while appropriately managing adverse environmental effects. Policy 9.1 provides for the development, maintenance , operating and upgrading utilities whilst managing their adverse environmental effects. Policy 9.5 seeks to enable the development of utilities to store and deliver irrigation and stock drinking water, including irrigation reticulation infrastructure, whilst avoiding, remedying or mitigating adverse environmental effects. Water abstracted under this consent will continue to provide a source of potable water for domestic use and stockwater for the community supplied by the Ashley Main. During times of low flow, water restriction management measures will be in place as per Appendix E. As per the assessment of environmental effects, the effect of the proposed variation is considered to be less than minor. It is

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therefore considered that the proposal is consistent with the Hurunui District Plan. 7.8 Iwi Management Plans

7.8.1 Te Rūnanga o Ngāi Tahu Freshwater Policy The focus of the Freshwater Policy Statement is the management of freshwater resources within the rohe of Ngāi Tahu. It outlines the environmental outcomes sought by Ngai Tahu and the means by which Ngāi Tahu is seeking to work with resource management agencies to achieve these outcomes. The key issue of relevance to this application is the need to protect the mauri of waterbodies through protection of water quantity and quality. In turn, this will protect other key cultural values such as the maintenance of mahinga kai. As discussed previously, the effect of the proposed variation is considered to be less than minor. The proposed consent conditions require that when the river flow falls below the Table 7 minimum flows for A permits, restrictions will be in place as detailed in the proposed consent conditions which will protect minimum flows in the Ashley River. As such, it is considered that this application is not contrary to the Te Rūnanga o Ngāi Tahu Freshwater Policy.

7.8.2 Mahaanui Iwi Management Plan The Mahaanui Iwi Management Plan was released in 2013, and is a planning document reflecting the collective efforts of six Papatipu Rūnanga, and provides a statement of Ngāi Tahu objectives, issues and policies for the management of natural resources and environment for many areas within Canterbury. The Mahaanui Iwi Management Plan’s purpose is to provide tāngata whenua a tool to express kaitiakitanga and protect taonga. Chapter 5.3 (Wai Māori) outlines the policies and objectives in relation to the management of water. Issue WM1 states that tāngata whenua have specific rights and interests associated with freshwater, and Policy WM1.4 requires local authorities to recognise the longstanding relationship of tāngata whenua to freshwater, and that this relationship is fundamental to the culture and cultural well-being of Ngāi Tahu. Policy WM3.1 advocates that the use of water be prioritised to 1) protect instream values and uses, meeting basic human health and safety needs (in particular provide a reliable supply of drinking water to marae and other communities), and ensure continuation of customer instream values, 2) water is equitably allocated for sustainable food production and 3) equitably allocated for other uses. Policy WM8.1 requires that environmental flow and allocation limits be set for all waterways, and WM8.2 requires that limits recognise and provide for Ngai Tahu values and interests and therefore deliver cultural and environmental outcomes.

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Section 6.3 Rakahuri addresses the Ashley (Rakahuri) River catchment. The Ashley/Rakahuri estuary is a described as a significant feature of the catchment, and is a wāhi taonga for tangata whenua. The catchment has strong mahinga kai associations for Ngai Tahu. Objectives in this section include seeking to protect cultural health and mahinga kai values of the river, and to protect water quality and quantity. Policy R2.1 requires that environmental flow and water allocation limits be in pace for the Ashley/Rakahuri River, and to acknowledge the need to restore the cultural health of the river, improving water quality, and ensuring a continuous and quality water supply to customer fishing reserves associated with the river. Water abstracted under CRC161302 is used for a community water supply, and would therefore be considered a high priority under Policy WM3.1. In addition, the proposed consent conditions specify that restrictions apply when river flows are below the LWRP Table 7 minimum flows for A permits. As discussed in Section 4.0 of the report, the effect of the proposed variation is considered to be less than minor. Therefore, the proposal is not considered to be inconsistent with the Mahaanui Iwi Management Plan.

8.0 Part 2 of the Resource Management Act Part 2 of the RMA sets out the purpose and principles of the Act, being “to promote the sustainable management of natural and physical resources” which is defined to mean: “managing the use, development, and protection of natural and physical resources in a way, or at a rate, which enables people and communities to provide for their social, economic and cultural wellbeing and for their health and safety while – (a) Sustaining the potential of natural and physical resources (excluding minerals) to meet the reasonably foreseeable needs of future generations; and (b) Safeguarding the life-supporting capacity of air, water, soil and ecosystems; and (c) Avoiding, remedying or mitigating any adverse effects of activities on the environment.” Whether the purpose of the RMA is being achieved involves “an overall broad judgement.” This approach has been questioned in light of the King Salmon and the Davidson1 decisions. It is considered that in this particular application Part 2

1 RJ Davidson Family Trust v Marlborough District Council [2017] NZHC

Environmental Defence Society Inc v The New Zealand King Salmon Co Ltd [2014] NZSC 38, [2014] 1 NZLR 593

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matters are adequately addressed by lower order documents, specifically the Canterbury Land and Water Regional Plan.

9.0 Notification Under the provisions of the amended RMA there is now no presumption in favour of notification (Section 95A). The requirement for the Council to be “satisfied” that the effects “will be minor” before proceeding on a non-notified basis has been removed. Instead, public notification is only required if the Council “decides” that the activity: ..will have or is likely to have adverse effects on the environment that are more than minor. On the basis of the preceding assessment, it is considered that the proposal does not require public notification under section 95A – the effects of the proposal are not considered to be more than minor. Under section 95B ‘Limited notification of the consent application’, the consent authority is then to decide (under sections 95E to 95G) whether there are any affected persons in relation to the activity. The threshold for identifying affected persons is more rigorous, whereby the consent authority must decide that a person is affected if the activity’s adverse effects are minor or more than minor (but not less than minor). Therefore, in order for there to be no ability for affected parties to be identified, the effects must be assessed as being “less than minor”. Having regard to the assessment undertaken within the AEE in support of this application, it is considered that there are no potentially adversely affected parties and the proposal can be processed on a non-notified basis.

10.0 Conclusions HDC is seeking to vary resource consent CRC161302, which authorises HDC to take up to 70 L/s (6,000 m3/day) from seven shallow bores to supply potable water for the Ashley Area. In particular, HDC seek to remove some of the trigger levels specified in the consent whilst retaining the low flow trigger level based on the A-block minimum flow for the Ashley River. The current Restriction Levels specified in the Water Restriction Management schedule attached to CRC161302 are based on A- B- and C-block minimum flows as specified in the CLWRP. Restrictions for the Ashley River are based on the flow recorded by ECan at the Ashley Gorge. Flows can change rapidly day to day, and similarly the Restriction Levels. At times of rapidly changing river flow, compliance with the consent is impractical if not impossible. The proposed variation will retain the restrictions for the A block minimum flows (corresponding to the Level 4 Critical Risk trigger of the current Water Restriction

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Management schedule). These critical low flow periods are when the ecology of the river is likely to be under stress and during these periods the water restriction management measures (as per Appendix E) remain unchanged. As such, during these times there will be no effect as a result of this consent variation. Overall, it is considered that the environmental effects of the consent variation are less than minor.

11.0 References

Bowden Environmental (2015), Resource Consent Application To Partially Transfer a Consent To Take and Use Groundwater. Assessment of Environmental Effects. Application prepared for Hurunui District Council and Waimakariri District Council. Environment Canterbury (2009). Canterbury Water Management Strategy. Environment Canterbury. Environment Canterbury (2013). Canterbury Regional Policy Statement 2013, Revised December 2013. Environment Canterbury. Environment Canterbury (2018). Land and Water Regional Plan. Christchurch: Environment Canterbury.

C03890500R002_AEE P A T T L E DELAMORE PARTNERS LT D PATTLE DELAMORE PARTNERS LTD LocationBoreof Field A Appendix HURUNUI DISTRICT COUNCIL - CONSENT VARIATION TO TAKE AND USE GROUNDWATER

Lot 2,DP 58913, 8.9160

SALTWATER CREEK RD

LOWER SEFTON RD Lot 1,DP 58913, 8.1110

M34/5772 A!

M34/5773 A!

Pt,RS 9289, M34/0674 Pt,RS 11202 14.9303 A! M34/5774 A! M34/0673 A! M35/11523 A! M35/11524 A!

KEY : ASHLEY RIVER

LAND PARCEL

A! BORE

SOURCE: 1. AERIAL IMAGERY (FLOWN [DATE]) SOURCED FROM THE LINZ DATA SERVICE https://data.linz.govt.nz/layer/53519-canterbury-03m-rural-aerial-photos-2015-2016/ AND LICENCED BY ECAN FOR RE-USE UNDER THE CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENCE. SCALE : 1:5,000 (A4) 2. CADASTRAL/TOPOGRAPHICAL INFORMATION AND INSET SOURCED FROM THE LINZ DATA SERVICE https://data.linz.govt.nz/ AND LICENSED FOR RE-USE UNDER THE CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENCE. 0 50 100 200 300 3. BORE LOCATION DATA SOURCED FROM CANTERBURY MAPS http://opendata.canterburymaps.govt.nz/datasets/wells-and-bores AND LICENSED FOR RE-USE UNDER THE CREATIVE COMMONS ATTRIBUTION 3.0 NEW ZEALAND. FIGURE 1 : LOCATION OF BORE FIELD METRES PATTLE DELAMORE PARTNERS LTD C03890500Z001_LOCATION.mxd 08/01/2019 ISSUE 1 PATTLE DELAMORE PARTNERS LTD Consent CRC161302 B Appendix

RESOURCE CONSENT CRC161302 Pursuant to Section 104 of the Resource Management Act 1991

The Canterbury Regional Council (known as Environment Canterbury)

GRANTS TO: Hurunui District Council

A WATER PERMIT: To take groundwater.

COMMENCEMENT DATE: 06 Nov 2015

EXPIRY DATE: 06 Nov 2050

LOCATION: Lower Sefton Road, Ashley

SUBJECT TO THE FOLLOWING CONDITIONS:

1 Water shall only be taken from bores:

a. M34/0674, 300 millimetres diameter and 11.3 metres deep, at map reference Topo50 BW24:70448-08535;

b. M34/0673, 300 millimetres diameter and 10.15 metres deep, at map reference Topo50 BW24:70466-0845; c. M34/5772, 300 millimetres diameter and 11.6 metres deep, at map reference Topo50 BW24: 70441-08599; d. M34/5773, 300 millimetres diameter and 10.8 metres deep, at map reference Topo50 BW24 70446-08549; e. M34/5774, 300 millimetres diameter and 11.5 metres deep, at map reference Topo50 BW24: 70456-08497; f. M35/11523, 300 millimetres diameter and 12.5 metres deep, at map reference Topo50 BW24: 70474-08418; and g. M35/11524, 300 millimetres diameter and 12 metres deep, at map reference Topo50 BW24: 70481-08378.

2 The rate at which water is taken from those bores specified in condition 1. shall not exceed 70 litres per second, 6,000 cubic metres per day and 1,300,000 cubic metres between 1 July and the following 30 June.

3 Water shall only be used for community water supply and/or stock drinking water purposes.

4 Whenever the:

a. Mean flow for the 24 hour period ending at noon on any one day in the Ashely/Rakahuri River, as estimated by Canterbury Regional Council at the AshleyGorge Recorder site (at or about Map reference Topo50 L34: 46399-74899), fall below 6000 cubic metres per second the consent holder shall implement the measures outlined in Schedule CRC161302;

Page 2 CRC161302

b. Mean flow for the 24 hour period ending at noon on any one day in the Ashely/Rakahuri River, as estimated by Canterbury Regional Council at the Gorge Recorder site (at or about Map reference Topo50 L34: 46399-74899), fall below the following flows for the following months, the applicant shall implement the measures outlined in Schedule CRC161302 to ensure that the quantity of water supplied does not exceed 250 litres per person per day and actual stock water requirements at the time.

Month January to July August to November December 3,000 litres per second Flow 2,500 litres per second 4,000 litres per second

5 Water Supply Asset Management Strategy:

a. The consent holder shall manage water demand in accordance with Schedule CRC161302 which is attached to and forms part of this resource consent;

b. Schedule CRC161302 shall include measures to reduce water demand and to improve efficiency of the water supply and distribution network.

c. The consent holder shall provide a copy of any amendments of their intended "Water Restriction Management" as outlined in Schedule CRC161302, tailored for the coming period, 1 July - 30 June to the Canterbury Regional Council: RMA Monitoring and Compliance Manager, within seven days of the amendments occurring.

6 The consent holder shall, before the first exercise of this consent, install an easily accessible straight pipe(s), with no fittings or obstructions that may create turbulent flow conditions, of a length at least 15 times the diameter of the pipe, as part of the pump outlet plumbing or within the mainline distribution system.

7 The consent holder shall before the first exercise of this consent:

a.

i. install a water meter(s) that has an international accreditation or equivalent New Zealand calibration endorsement, and has pulse output, suitable for use with an electronic recording device, which will measure the rate and the volume of water taken to within an accuracy of plus or minus five percent as part of the pump outlet plumbing, or within the mainline distribution system, at a location(s) that will ensure the total take of water is measured; and

ii. install a tamper-proof electronic recording device such as a data logger(s) that shall time stamp a pulse from the flow meter at least once every15 minutes, and have the capacity to hold at least one season’s data of water taken as specified in clauses (b)(i) and (b)(ii), or which is telemetered, as specified in clause (b)(iii).

Page 3 CRC161302

b. The recording device(s) shall:

i. be set to wrap the data from the measuring device(s) such that the oldest data will be automatically overwritten by the newest data (i.e. cyclic recording); and

ii. store the entire season’s data in each 12 month period from 1 July to 30 June in the following year, which the consent holder shall then download and store in a commonly used format and provide to the Canterbury Regional Council upon request in a form and to a standard specified in writing by the Canterbury Regional Council; or

iii. shall be connected to a telemetry system which collects and stores all of the data continuously with an independent network provider who will make that data available in a commonly used format at all times to the Canterbury Regional Council and the consent holder. No data in the recording device(s) shall be deliberately changed or deleted.

c. The water meter and recording device(s) shall be accessible to the Canterbury Regional Council at all times for inspection and/or data retrieval.

d. The water meter and recording device(s) shall be installed and maintained throughout the duration of the consent in accordance with the manufacturer’s instructions.

e. All practicable measures shall be taken to ensure that the water meter and recording device(s) are fully functional at all times.

8 Within one month of the installation of the measuring or recording device(s), or any subsequent replacement measuring or recording device(s), and at five-yearly intervals thereafter, and at any time when requested by the Canterbury Regional Council, the consent holder shall provide a certificate to the Canterbury Regional Council, Attention: Regional Manager, RMA Monitoring and Compliance, signed by a suitably qualified person certifying, and demonstrating by means of a clear diagram, that:

a. The measuring and recording device(s) has been installed in accordance with the manufacturer’s specifications; and

b. Data from the recording device(s) can be readily accessed and/or retrieved in accordance with clauses (b) and (c) of condition (7).

9 The community supply protection zone established for those bores listed in condition 1. shall not exceed the area identified in Plan CRC161302 attached to, and forming part of, this resource consent.

10 The Canterbury Regional Council, Attention: Regional Manager, RMA Monitoring and Compliance, shall be informed immediately on first exercise of this consent by the consent holder.

11 The consent holder shall take all practicable steps to avoid leakage from pipes and structures.

Page 4 CRC161302

12 Before the exercise of this consent, CRC980467.1 and CRC160705 shall be surrendered.

13 The Canterbury Regional Council may, once per year, on any of the last five working days of May or November, serve notice of its intention to review the conditions of this consent for the purposes of:

a. Dealing with any adverse effect on the environment which may arise from the exercise of the consent; or

b. Requiring the adoption of the best practicable option to remove or reduce any adverse effect on the environment.

14 The lapsing date for the purposes of section 125 of the Resource Management Act shall be 30 September 2018.

Issued at Christchurch on 6 November 2015

Canterbury Regional Council

Information has been derived from various sourc es, including E nvironment Canterbury Regional Council’s databases. Boundar y information is Plan CRC161302: Hurunui District Council derived under licence from LINZ Digital Cadastral Database ( Crown Copyright Reser ved). Envir onm ent Canterbury Regional Council does not 0 0.1 0.2 0.3 0.4 give and expr essly disclaim any war ranty as to the accuracy or completeness of the inform ation or its fitness for any purpose. Kilome tres Scale: 1:14,000 @A4 Information from this web site may not be used for the purposes of any legal disputes. The user should independently verify the accurac y of any inform ation before taking any action in reliance upon it. ´ Map Created by Environment Canterbury on

Environment Canterbury Land Information New Zealand, LINZ, Environment Canterbury, Environment Canterbury

PATTLE DELAMORE PARTNERS LTD Example Hydrograph C Appendix C - 2

HURUNUI DISTRICT COU NCIL - CON SENT VARIATION TO TA KE AND USE GROUNDWAT E R - ASSESSMENT OF E NVIRONMENTAL EFFECTS

Note: average daily flow calculated as the mean flow for the 24 hour period ending at noon on any one day.

C03890500R002_AEE P A T T L E DELAMORE PARTNERS LT D PATTLE DELAMORE PARTNERS LTD Water SupplyAsset Management Strategy D Appendix

Ashley Main Water Supply Strategy

• Prepared for Hurunui District Council

• April 2019

PATTLE DELAMORE PARTNERS LTD 295 Blenheim Road Tel +64 3 345 7100 Fax +64 3 345 7101 Upper Riccarton, Christchurch 8041 Website http://www.pdp.co.nz PO Box 389, Christchurch 8140, New Zealand Auckland Tauranga Wellington Christchurch

C03890500R001_ASHLEYWSS_FINAL

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HURUNUI DISTRICT COU NCIL - ASHLEY MAIN WATER SU PPLY STRATEGY

Table of Contents

SECTION PAGE

1.0 Introduction 1

2.0 Hurunui District’s Water Supplies 1 2.1 Population and Future Demand 5 2.2 Financial Strategy to Meet DWSNZ Compliance 7 2.3 Asset Maintenance and Operation 9 2.4 Asset Renewals 10 2.5 Asset creation 13 2.6 Levels of Service 25 2.7 Improvement and Monitoring 31

3.0 Ashley Main Water Supply Strategy 32 3.1 Description of Ashley Water Supply System 32 3.2 Existing and Future Demand for Water 37 3.3 Water Conservation Methods, Efficient Use and Minimising Water Losses 38 3.4 Alternative Water Sources 43 3.5 Drought Management Plan 43

4.0 References 44

Table of Figures

Figure 1: HDC’s Water Schemes – Areas Served 4

Figure 2: District Population Estimates and Long-term Projection 6

Figure 3: District Wide Water Main Renewal Profile 2018 – 2099 11

Figure 4: District Wide Water Facilities Renewal Profile 12

Figure 5: Ashley Bore Supply Areas 32

Figure 6: Ashley Main Lower Sefton Rd Intake Points 33

Figure 7: Area serviced by the Ashley Main Intake 33

Figure 8: Ashley East Smiths Rd Intake Point 34

Figure 9: Ashley North Racecourse Rd Intake Point 35

Figure 10: Ashley North Kowai River Rd Intake Point 35

Figure 11: Leithfield Beach Deep Bore 36

Figure 12 : Ashley Main Water Supply Schematic 37

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Figure 13 : Water Main Renewal Profile for Ashley Rural Scheme 2018 – 2099 41

Figure 14 : Facilities Renewal Profile for Ashley Rural Scheme 2018 - 209942

Table of Tables

Table 1: Water Scheme Overview as at July 2017 2

Table 2: Long-Term Population Projections1 5

Table 3: Long-Term Population Projections - Waimakariri District Areas 1 6

Table 4: Scheme Upgrade Costs associated with Demand 7

Table 5: Original Budget Costs as at 2017 to meet Drinking Water Standards ($,000) 8

Table 6: Preliminary Maintenance and Operation costs ($,000) 9

Table 7: Comparison of Water Main Renewal Scenarios 11

Table 8: Capital Expenditure ($,000) 14

Table 9: LTP Water Levels of Service 26

Table 10: New Revised Water Supply Performance Measures November 2017 28

Table 11: Timetable for AMP Audit and Review 31

Table 12: Demand Management Strategies 39

Table 13: Drought Management Plan 43

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1.0 Introduction

The Hurunui District Council (HDC) owns and operates Water Services assets that supply various townships and rural areas within its district. HDC sources its water for these community water supplies from both surface water and groundwater abstractions. Policy 4.49 of the Canterbury Land and Water Regional Plan provides for enabling the taking of water for a community water supply. A community water supply need not comply with any minimum flow, residual flow, or partial restriction conditions, nor any environmental flow and allocation regime or groundwater allocation limit, provided that a Water Supply Strategy (prepared in accordance with Schedule 25 of the LWRP) is in place. In addition, the water supply must be managed so that the use of water is restricted during periods of low flow or low water levels. The purpose of this document is to provide a Water Supply Strategy meeting the requirements of LWRP Schedule 25. Section 2.0 provides a general overview of the HDC owned and operated community water supplies across the district. Section 3.0 provides a description and Water Supply Strategy for the Ashley Main supply.

2.0 Hurunui District’s Water Supplies

The Hurunui District Council (HDC) owns and operates Water Services assets that cover seven on demand schemes and 12 rural water schemes. These are summarised below in Figure 1 and Table 1.

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Table 1: Water Scheme Overview as at July 2017

Scheme Connection Area Served Reticulation Pump Water Source Water Treatment Numbers (ha) Length (km) Stations (July 2017)

On Demand Schemes

Amberley 983 - 41.5 3 Racecourse Rd - Deep bore Secure Sources – NaOCl Treatment Kowai River – Deep bore Leithfield SH1 - Deep bore

Culverden 211 - 10.5 1 76 m bore Secure Source – NaOCl Treatment

Leithfield Beach 231 - 8.1 1 Deep Bore Secure Source – NaOCl Treatment

Hanmer Springs 1,279 - 56.7 2 Two river galleries (Rogerson and Dillon Filtered and UV disinfected with NaOCl Rivers) Treatment

Hawarden - 479 - 73.9 3 24m bore (Hurunui River) UV treated and NaOCl Treatment Waikari

Waiau Township 169 - 9.2 1 Shallow bore adjacent to Mason/Waiau Ultrafiltration & NaOCl Treatment River.

Waipara 150 - 7.7 1 29m deep bore on the Waipara River MIOX flat

Restricted Schemes

Amuri Plains 155 11,650 77.7 1 Two shallow bores, close to UV treated and NaOCl Treatment. the Waiau River

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Table 1: Water Scheme Overview as at July 2017

Scheme Connection Area Served Reticulation Pump Water Source Water Treatment Numbers (ha) Length (km) Stations (July 2017)

Ashley 2,543 55,000 680.8 13 Main intake - Five shallow bores on MIOX and UV Lower Sefton Rd3 Leithfield Beach deep bore Secure Source – NaOCl Treatment Racecourse Rd - Deep Bore Secure Source – NaOCl Treatment

Balmoral 60 13,600 51.8 1 Normally from a weir on the Awatui NaOCl Treatment Stream, if the weir flow is unavailable, water is pumped from the Pahau River

Blythe 27 4,600 27.0 2 One shallow river flat bore MIOX Cheviot 670 22,000 198.9 6 Three bores adjacent to the Waiau River MIOX Hurunui #1 517 39,600 318.0 12 One large river gallery (Hurunui River) MIOX Kaiwara 75 23,000 95.7 6 River gallery MIOX Lower Waitohi 136 14,600 127.0 6 One shallow bore MIOX Parnassus 74 27,000 70.3 5 One shallow river flat bore MIOX Peaks 35 3,900 27.4 1 One mid-sized river gallery MIOX Upper Waitohi 197 25,000 151.2 3 One shallow river flat bore MIOX Waiau RWS 99 24,000 112.2 11 Shallow bore adjacent to the Waiau MIOX River

Notes: 1. Source: Hurunui District Council Asset Management Plan 2017 (Opus, 2018). 2. Opus (2018) state: “Note that all bores listed as secure have not been confirmed as such by Ministry of Health (MoH). However, bores largely meet the criteria for secure groundwater status.” 3. There are a total of seven bores, with two of these left on standby for peak demand use.

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Figure 1: HDC’s Water Schemes – Areas Served1

1 Hurunui District Council Asset Management Plan 2017 (Opus, 2018).

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2.1 Population and Future Demand

Long-term population projections (to 2046) have been developed in a 2013 study based on consideration of historic trends, Statistics NZ projections (to 2031), drivers of growth and constraining factors. The 2016 North Canterbury earthquake will have had some effect on population movement and distribution in the district that is not yet reflected in the predictions. Hurunui District has sustained modest growth comparable to the national average over the last 20 years, amounting to a population increase of 2,600 (29%) from 1991 to 2013. A revised projection through to 2046 has been prepared to support the 30-year Infrastructure Strategy (2015-45). Based on 2013 census results, a general understanding of recent growth, and the drivers and other potential influences a series of Area Unit population projections have been developed and aggregated to District level. These are presented in Table 2 and Table 3.

Table 2: Long-Term Population Projections1

Area Unit 2016 2021 2026 2031 2036 2041 2046

Amberley 1,660 1,760 1,870 1,922 1,975 2,030 2,086

Amuri 1,780 1,920 2,040 2,150 2,253 2,356 2,459

Cheviot 380 380 380 380 380 380 380

Culverden 440 450 450 450 450 450 450

Hanmer Springs 885 935 985 1,035 1,059 1,083 1,107

Leithfield 3,020 3,210 3,390 3,481 3,575 3,671 3,745

Parnassus 950 955 960 955 955 955 955

Waiau 270 270 270 270 270 270 270

District Total 12,085 12,590 13,055 13,353 13,627 13,905 14,162

Actual District Total 12,7002

Notes: 1. The population figures presented here relate to Census Area Units which do not correlate directly with the urban areas or with the actual areas serviced by Council. 2. Actual District Total population figure from Local Government Commission (Note: 2017 – 12,800 population). 3. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

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Figure 2: District Population Estimates and Long-term Projection

Table 3: Long-Term Population Projections - Waimakariri District Areas 1

Area Unit 2016 2021 2026 2031 2036 2041 2046

Ashley (WDC) 1,200 1,340 1,490 1,585 1,680 1,775 1,870

Loburn (WDC) 2,380 2,640 2,920 3,134 3,348 3,562 3,776

Sefton (WDC) 680 730 770 820 870 920 970

Notes: 1. The population figures presented here relate to Census Area Units which do not correlate directly with the urban areas or with the actual areas serviced by Council 2. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

2.1.1 Scheme Capacity Upgrade Costs The costs associated with increased demand (as detailed in Table 2 and Table 3 above) for a number of schemes have been programmed as capital projects in the next 10 years and are presented in Table 12 below. The estimates use standard pipe rates and have no allowance for ground conditions, market and material cost variations, watercourse / bridge / rail crossings etc.

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Table 4: Scheme Upgrade Costs associated with Demand

Scheme Upgrade required 2 Capital Cost

Ashley $3,551,500 $3,551,500

Cheviot $865,400 $865,400 Hurunui No 1 $115,500 $115,500

Total $4,532,400

Notes: 1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

2.2 Financial Strategy to Meet DWSNZ Compliance Council is strongly committed to providing safe, secure and affordable drinking water throughout all 19 District-wide water schemes. In 2012, with a goal to taking all practical steps to meet DWSNZ, it was calculated that to meet full drinking water standards for all Council’s water schemes, the District would have to invest over $14,000,000 in capital improvements works alone. In 2017 Council engaged Opus International Consultants to provide an independent updated budget estimate for achieving protozoal compliance. The Water Treatment Budget Estimates 2017 report provided a budget estimate of $15.7M. This includes an allowance for wastewater handling and disposal systems but excludes professional services and contingency. Council have increased the budgets based on the latest costs in the 2017 report and have brought works forward to begin in 2022. Council are currently reviewing the report as well as considering procurement options for implementing the district wide upgrades. These original budget costs are presented in Table 5. Note that the below costs are not inclusive of the changes associated with the 2018 revision of the DWSNZ, and the Council budget estimates will need to be updated.

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Table 5: Original Budget Costs as at 2017 to meet Drinking Water Standards ($,000)

Scheme 2018/19 2019/20 2020/21 2021/22 2022/23 2023/24 2024/25 2025/26 2026/27 2027/28 District-wide 689 1381 investigations District-wide 20 power investigations District-wide 120 100 land purchase investigations District-wide 195 195 195 195 120 power supply investigations District-wide treatment works Blythe 634 Haw-Waikari 1733 Peaks 634 Parnassus 998 Kaiwara 998 Amuri Plains 1733 Ashley 1089 Upper Waitohi 1369 Lower Waitohi 570 Balmoral 1024 Cheviot Rural 1733 Hurunui Rural 1733 Waiau Rural 1365 Water Total 829 1481 3587 5026 4295 2217 1388 Total cost: 18,823,000

Notes:

1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

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2.3 Asset Maintenance and Operation The objective of maintenance and operational strategies is to maintain existing assets economically to:

• Achieve their service potential through efficient operation

• Achieve customer Levels of Service

• Achieve health and safety standards

• Reduce Council’s exposure to risk due to unforeseen failure of assets Operations and Maintenance is the day-to-day activities to consistently achieve the optimum use of the asset, to be able to deliver the required Levels of Service. It is also defined as a group of activities that preserve an asset condition to make it perform its required function. Preliminary Maintenance and Operation costs for the Water Services are presented below.

Table 6: Preliminary Maintenance and Operation costs ($,000)

Scheme 3 2018/19 2019/20 2020/21 2021/22 2022/2 2023/24 2024/25 2025/26 2026/27 2027/28

Admin Water and 286 286 286 286 286 286 286 286 286 286 Sewer Admin On Demand Schemes Amberley 150 155 159 170 165 170 185 172 177 179 Culverden 50 52 53 75 73 75 80 75 77 78 Leithfield 75 78 80 85 83 85 92 86 88 90 Beach Hanmer 175 181 186 198 193 219 236 221 226 229 Springs Hawarden 75 78 80 85 95 97 94 98 100 102 - Waikari Waiau 75 78 80 85 83 85 92 86 88 90 Township Waipara 25 26 27 28 28 28 31 41 41 42 Restricted Schemes Amuri 75 78 80 85 95 97 104 98 100 102

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Table 6: Preliminary Maintenance and Operation costs ($,000)

Scheme 3 2018/19 2019/20 2020/21 2021/22 2022/2 2023/24 2024/25 2025/26 2026/27 2027/28 Plains Ashley 524 566 580 618 621 639 690 645 661 671 Balmoral 50 52 53 57 55 57 62 57 66 67 Cheviot 400 413 424 453 441 454 530 503 522 529 Rural Hurunui 649 672 689 737 739 779 853 798 844 836 Rural Waiau 175 181 186 198 193 199 228 213 218 221 Rural Water 2498 2610 2677 2874 2864 2984 3277 3093 3208 3236 Total

Notes: 1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018) 2.4 Asset Renewals

2.4.1 Water Main Renewals Water main renewal profiles have been generated using recorded pipe data in Council’s AssetFinda database and theoretical aged based renewal dates. The cluster of pipes coming up for renewal between 2018 and 2033 are AC (asbestos cement) mains and galvanised steel sub-mains and service connections. There is a second significant cluster of pipes identified for renewal between 2047 and 2053 that represent small diameter rural PE and PVC pipe installed between 1967 and 1973.

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Figure 3: District Wide Water Main Renewal Profile 2018 – 2099

The age based asset data indicates an $18.1M cost over the next 10 years to replace old AC assets that have reached the end of their theoretical asset life. This significant financial burden has prompted Council to investigate further renewal scenarios that consider additional factors to set a more affordable as risk-managed renewal programme, rather than relying on the traditional age based approach used to date. These scenarios are described below to show the various impacts on funding, network performance, and risk profiles. The preferred Scenario A has adopted a combination of pipe criticality, ongoing maintenance performance, and theoretical useful life to set the pipe renewal budgets.

Table 7: Comparison of Water Main Renewal Scenarios Scenario A Scenario B Scenario C

Basis Criticality, Age based Performance performance & age based

Average Annual $765,000 $1,810,000 $200,000 Renewal Funding over 10 years

Value of old AC mains $10,045,000 $0 $16,100,000 beyond their theoretical useful life in 2028

Financial risk of over- Medium High Low investment

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Table 7: Comparison of Water Main Renewal Scenarios Scenario A Scenario B Scenario C

Average Annual $765,000 $1,810,000 $200,000 Renewal Funding over 10 years

Notes: 1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

2.4.2 Facilities The estimated cost of the renewal capital work (which is work that is required from time to time to refurbish, or replace existing assets of equivalent capacity or performance capability) for facilities is shown below. It is intended that the Maintenance Engineer (Service Delivery) will review all facilities to gain a better snapshot of prevailing condition ratings and performance. This exercise will provide improved predictions of renewal work required for this asset category and perhaps reduce current prediction demand for renewals based only on asset age. Added to this, all facilities will be individually assessed for criticality, with a focus to very high and high critical components. The outcome of these assessments will drive facility upgrades to provide alternative back-up of critical components and thus mitigate or eliminate loss of crucial service. Facilities include plant items situated at treatment plants and pump sheds.

Figure 4: District Wide Water Facilities Renewal Profile

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2.5 Asset creation This activity is the creation of a new asset that did not previously exist, or works which upgrade or improve an existing asset beyond its current capacity or performance in response to changes in demands or customer expectations (i.e. growth or level of service improvements). Assets are acquired as a result of:

• Meeting new standards required by policies and legislation (e.g. additional treatment facilities to meet new legislation).

• Taking over new reticulation constructed with sub-divisional development (constructed at the developer’s expense).

• Extensions constructed by Council to service new areas.

• Providing additional system capacity to overcome inadequacies or provide for growth and future demands (e.g. larger pipes, pumps, and treatment capacity). The extent of asset creation for the period 2018/19 to 2027/28 amounts to $35.6M (excluding renewals) and the annual asset creation expenditure is presented below in Table 8.

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Amberley New asset connections & 38.8 38.8 38.8 38.8 38.8 38.8 38.8 38.8 38.8 38.8 improvements Improved supply resilience (new - 950 ------storage, treatment, pumps & 5km water main – RC Rd) 5ML Reservoir (planning, design and ------100 400 2500 build) Hydraulic model rebuild 20 ------Age testing bores (SH1) WSP ------Well head inspection (SH1) WSP - 2.5 - - - - 2.5 - - - Subtotal 58.8 991.3 38.8 38.8 38.8 38.8 41.3 138.8 438.8 2538.8 Ashley Rural New asset connections & 95 95 95 95 95 95 95 95 95 95 improvements

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Hydraulic model build 50 ------Stewarts Line – Forestry Res to 592 ------Henrys Ford Loburn Rising Main Replacement - 390 ------(Pound Road to Chapel Road) Loburn Rising Main Replacement - - 540 ------(Chapel Road to Yaxleys/Stoneyflat Rd Jcn) Cones Road to Henrys Road Ring - - - - - 428 - 428 - 428 Main Rangiora Leithfield Road Upgrade - - - - 337.5 - - - - - (Amors Rd to Pembertons 2.5km) Age testing bores (Leithfield ------Beach/Kowai) WSP Well head inspection (Leithfield - 5.0 - - - - 5.0 - - - Beach /Kowai) WSP

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Well head inspection (RC Rd) WSP - - - 2.5 - - - - 2.5 - Subtotal 737 490 635 97.5 432.5 523 100 523 97.5 523 Culverden New asset connections & 10 10 10 10 10 10 10 10 10 10 improvements Additional storage and source 130 ------options assessment Age testing bore ------Well head inspection - 2.5 - - - - 2.5 - - - Subtotal 140 12.5 10 10 10 10 12.5 10 10 10 Waiau Township New asset connections & 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 improvements EQ event related/WSP Reinstate 126.6 ------reservoir storage

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 WSP Permanent Generator for - 30 ------Treatment shed Portable generator for Amuri-Waiau area that will service the township intake Subtotal 130.4 33.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Amuri Plains New asset connections & 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 improvements Reservoir Upgrade - 105 ------Hydraulic model build - 15 ------Subtotal 6.3 126.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 Balmoral New asset connections & 1 1 1 1 1 1 1 1 1 1 improvements Hydraulic Model Build - 5 ------

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 WSP Install dedicated generator for 12 ------treatment shed DWSNZ Full Compliance Works - - 32 64 - - 20 1024 - - (Investigation Y3&4/Works Y7/Y9) Subtotal 13 6 33 65 1 1 22 1025 1 1 Waiau RWS New asset connections & 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 improvements EQ related works – Intake/U 150.6 ------Highfield/Sherwood Res Hydraulic model build - 20 ------Subtotal 153.1 22.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Cheviot New asset connections & 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5 improvements

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Cheviot Main reservoir upgrade - - 100 ------Cheviot Main Pipe upgrade (225mm ------Main Res to Barnes Junction) Cheviot Main Pipe upgrade (Domett - 64.4 ------including SH1 crossing) Cheviot Main Pipe upgrade (Port - - 21 ------Robinson improvements) Cheviot Main Gore Bay COMS 16 ------Improvements Blythe intake flood protection/access - - 5 30 ------Parnassus Booster PS upgrade & - 20 20 ------reservoir security works Hydraulic model build 20 20 ------WSP Repair or replace old reservoirs 40 ------One Tree Hill/Hendersons EQ related works – 25.3 ------

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Kulnine/Bush/Wilkinsons (Parnassus) EQ related works – Record 11.1 ------Booster/Well No 3 (Cheviot) EQ related works – Mt 49.1 ------Styche/Random Spur (Kaiwara) Subtotal 184 126.9 168.5 52.5 22.5 22.5 22.5 22.5 22.5 22.5 Waipara Township New asset connections & 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 improvements Intake land purchase - - - 150 ------Additional reservoir storage & new 100 booster pumps Age testing bore Well head inspection 2.5 Subtotal 6.3 6.3 6.3 156.3 108.8 6.3 6.3 6.3 6.3 8.8

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Hanmer Springs New asset connections & 20 20 20 20 20 20 20 20 20 20 improvements Treatment process upgrade (Floc/UV) 60 120 ------Hydraulic model build 10 ------WSP Thomas Hanmer Drive Reservoir 20 150 ------assessment Subtotal 110 290 20 20 20 20 20 20 20 20 Hawarden-Waikari New asset connections & 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 improvements Bishells Road Watermain - 560 ------replacement (3.1km of 150mm PVC) Resilience of supply (investigation 20 ------into storage)

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Hydraulic model build 10 ------Subtotal 38.8 568.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 Hurunui Rural New asset connections & 18.8 18.8 18.8 18.8 18.8 18.8 18.8 18.8 18.8 18.8 improvements Standby generator Hurunui No1 ------intake (include pad & cabling) Water source review (deep bore 75 ------options) – UW, LW, Peaks Lower Waitohi – McRaes Rd LoS 30 ------upgrade (125mm river crossings) Lower Waitohi – mainline LoS 390 ------upgrade (3km of 110mm PN12/PN16) Mt Alex pipe upgrade (2.5km booster - - - - 82.5 - - - - - to Res 90mm PN16) Motunau Beach Watermain (d/s of 71 ------

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Res 2km 90mm PN12 ) Greta Valley pipe upgrade (u/s of - - - 115.5 ------Greta West 3.5km 90mm PN12) EQ related works – H1 intake/res, 318.1 ------Greta Valley Res, Davaar PS Hydraulic model build 30 ------Subtotal 932.9 18.8 18.8 134.3 101.3 18.8 18.8 18.8 18.8 18.8 District Wide (excl. Balmoral) District Wide DWSNZ Full Treatment - - 689 1381 ------Compliance Investigation District Wide DWSNZ Full Treatment - - - - 3392 4831 4100 998 1268 - Compliance works District Wide Power Upgrade - - - - 195 195 195 195 120 - Investigation into power supplies & - - 20 ------generators across the district Investigate potential Land - - 120 100 ------

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Table 8: Capital Expenditure ($,000)

Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10

2018/ 2019/ 2020/ 2021/ 2022/ 2023/ 2024/ 2025/ 2026/ 2027/ 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 Purchase/Lease for DWSNZ Full Treatment Works District Wide Pump replacement 79.2 79.2 79.2 79.2 79.2 79.2 79.2 79.2 79.2 79.2 District Wide Pump Shed Upgrades 40 40 40 40 40 40 40 40 40 40 District wide Flow meters 34 34 34 34 34 34 34 34 34 34 Subtotal 153.2 153.2 982.2 1634.2 3740.2 5179.2 4448.2 1346.2 1541.2 153.2 Total 2663.8 2846.4 1927.7 2230 4496.5 5841 4713.3 3132 2177.5 3317.5

Notes: 1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

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2.6 Levels of Service The 2010 Amendments to the Local Government Act 2002 has signalled a nationally agreed set of Levels of Service to be incorporated in the development of the Long Term Plan (LTP). In 2014 the Department of Internal Affairs (DIA) produced the mandatory performance measures for all territorial authorities to report on, along with guidance for their measurement. These new performance measures do not provide a defined level but rather show how the Council is performing, i.e. the number of complaints received. Council identified the compliance targets for these new mandatory measures and they were adopted from 2015 onwards. As provided by Section 261B of the LGA 2002: Non-Financial Performance Measures Rules the performance measures are:

• Performance measure 1 - Safety Of Drinking Water

• Performance measure 2 - Customer Satisfaction

• Performance measure 3 - Demand Management

• Performance measure 4 - Fault Response Times

• Performance measure 5 - Maintenance of the Reticulation Network The mandatory performance measures and Council’s latest performance up to 2016/17 are presented in Table 9 below. From November 2017 Council is proposing to adopt new Water Supply Performance Measures as presented in Table 10 and future performance will be recorded against these. In addition, the Council carry out an annual Residents Satisfaction Survey, which provides a useful commentary on issues that concern residents.

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Table 9: LTP Water Levels of Service

Community Level of Service Performance Measure Target 2015/2016 2016/2017 Outcome A desirable and safe Safety of Drinking The extent of compliance with part 4 of the 0% failure 0.57% failure 0.49% failure place to live Water drinking water standards (bacteria compliance criteria)

The extent of compliance with part 5 of the Not yet Not compliant to Not compliant to drinking water standards (protozoal date date compliance criteria).

A place with Maintenance of the The percentage of real water loss from the On demand 15.5% excluding Not measured essential Reticulation local authority’s networked reticulation metered supplies: Amberley) infrastructure Network system (including a description of the max 20% losses

methodology used to calculate this). On demand Unable to measure Unable to measure unmetered real water losses real water losses supplies: N/A (no meters). (no meters). Restricted supplies: Unable to measure Unable to measure N/A real water losses real water losses (restricted supply to (restricted supply tanks with unknown to tanks with measure of actual unknown measure usage per day). of actual usage per day). Where the local authority attends a call-out in Fault Response response to a fault or unplanned interruption Times to its networked reticulation system, the following median response times measured:

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Table 9: LTP Water Levels of Service

Community Level of Service Performance Measure Target 2015/2016 2016/2017 Outcome a. attendance for urgent call-outs: from the Median response 2.3 Median response time that the local authority receives 2 hours hours. 48 requests 1.85 hours for On notification to the time that service personnel total Demand schemes reach the site, and and 5.52 hours for Restricted schemes b. resolution of urgent call-outs: from the time Median response 2.6 Median response that the local authority receives notification to 12 hours hours. 48 requests 2.02 hours for On the time that service personnel confirm Demand schemes resolution of the fault or interruption., and and 22.31 hours for Restricted schemes c. attendance for non-urgent call-outs: from the Median response Median response time that the local authority receives 72 hours 26.5 hours. 1,967 21.08 hours notification to the time that service personnel requests total reach the site, and d. resolution of non-urgent call-outs: from the Median response Median response time that the local authority receives 120 hours 42.2 hours. 1,967 24.59 hours notification to the time that service personnel requests total confirm resolution of the fault or interruption

Customer The total number of complaints received by Satisfaction the local authority about any of the following (expressed per 1,000 connections to the local authority’s networked reticulation system): 6.2 per 1000 (47 total 4.1 per 1000 a. drinking water clarity 0 complaints) (31 total complaints b. drinking water taste 3.9 per 1000 2.0 per 1000 0 (30 total complaints) (15 total complaints)

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Table 9: LTP Water Levels of Service

Community Level of Service Performance Measure Target 2015/2016 2016/2017 Outcome c. drinking water odour 1.4 per 1000 0.9 per 1000 0 (11 total complaints) (7 total complaints) d. drinking water pressure or flow 4.1 per 1000 1.2 per 1000 0 (31 total complaints) (9 total complaints) e. continuity of supply, and 54.1 per 1000 18.2 per 1000 0 (411 total (138 total complaints) complaints) f. the local authority’s response to any of these Not recorded Not recorded 0 issues Demand The average consumption of drinking water per 298 l/p/d (on 292 l/p/d (on 285 l/p/d Management day per resident within the territorial authority demand schemes) demand schemes) district

Table 10: New Revised Water Supply Performance Measures November 2017

Performance What we want to What we are going to measure What we are How we will measure this Measure do aiming for Safety Supply safe drinking Bacteria compliance1 No failed water National Water Information New water tests Zealand (WINZ) database2 Protozoa compliance3

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Table 10: New Revised Water Supply Performance Measures November 2017

Performance What we want to What we are going to measure What we are How we will measure this Measure do aiming for Maintenance Maintain water Water loss from metered town supplies To lose no more The difference between water systems so water is (on demand water) than 20% volume pumped to the water schemes and not wasted or lost4 of water the consumed amount according to

Council’s water meters

Water loss from rural supplies Currently unable to measure water (restricted water) loss from restricted supplies5

Response Time To respond quickly The median time it takes for service To respond within Customer Service Request system to water supply call personnel to reach a site in response 4 hours outs to an urgent call out due to a complete loss of water supply

The median time it takes for a person To respond within to attend site in response to non- 3 days urgent call outs (where there is still a supply of water)

The median time it takes to resolve To fix within 16 urgent call outs hours

The median time it takes to resolve To fix within one non-urgent call outs week

Customer Reduce the number Drinking water clarity No complaints Customer Service Request system Satisfaction of water related Drinking water taste complaints Drinking water odour

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Table 10: New Revised Water Supply Performance Measures November 2017

Performance What we want to What we are going to measure What we are How we will measure this Measure do aiming for Drinking water pressure or flow Drinking water continuity The total number of complaints per 1,000 connections

Demand Have enough water The average consumption of drinking To supply up to Council’s water meters Management to supply our water per day per customer on 285 litres of consumers township supplies water per person per day

Notes: 1. The Drinking Water Standards New Zealand stipulate that drinking water must have less than 1 e -coli per 100ml of drinking water tested. Any e-coli tests that are above that warrant a failed test. 2. The WINZ data base is administered by the Ministry of Health. We will not be measuring protozoa compliance for several years in accordance with the Council’s Water Services Plans approved by the Ministry of Health. Plans are in place to have all protozoa compliance treatment systems on at‐risk intakes installed by 2024 (for minor schemes); 2025 (for small schemes); and 2026 (for neighbourhood schemes), unless substantial financial subsidies become available and are approved by Ministry of Health 3. Protozoa means any of a large group of one-celled organisms (called protists) that live in water or as parasites 4. Water losses can occur through leaks, meter inaccuracies or water theft, but excludes unauthorised emergency usage; for example to put out fires 5. Restricted water supply schemes operate according to how many daily units of water are purchased from the consumer and suppli ed through set water restrictors into private tanks or reservoirs. However, the water supply shuts off when the receiving tank or reservoir is full. We are unable to measure the actual water consumed daily as this meth od is unmetered. 6. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

.

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2.7 Improvement and Monitoring As part of Council’s Water Asset Management Plan (AMP) 2017, an Improvement Plan has been developed to maintain or improve the Water assets and the service of the Water asset. The AMP requires Council to make condition and performance assessments on asset components, collect relevant data and extrapolate with a better measure of certainty, to ascertain when renewals (and upgrades) are likely to be required over the next 30 years and to structure funding for these. The Improvement Plan requires the AMP to be audited and reviewed on an on-going basis, as outlined in the below table:

Table 11: Timetable for AMP Audit and Review

Activity Target Date

Asset Management Improvement 6 monthly Programme 6 monthly meetings with Asset Managers

Improvement Plan reviewed annually 30 June each year by all staff directly involved and focusing on key business issues

Report on Improvement Plan 30 June each year

AMP updates involving members of 30 June each year staff involved in preparing specific aspects of the AMP

Adoption of AMP by Council 30 June every 3 years

External benchmarking by internal Annually staff

Audit NZ external audit As required by Audit NZ

Notes: 1. Source: Hurunui District Council Water Asset Management Plan 2017 (Opus, 2018)

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3.0 Ashley Main Water Supply Strategy

HDC supplies water to the Ashley area (see Figure 5 below), consisting of the following areas and supplies:

• South/Ashley Main: seven shallow bores at Lower Sefton Road (pink area)

• North/Broomfield: Deep bore at Racecourse Road (blue area)

• Leithfield/Leithfield Beach/Amberley Beach: Leithfield Beach bore (with some input from Kowai River Road and Leithfield SH1 bores) (green area).

Figure 5: Ashley Bore Supply Areas

3.1 Description of Ashley Water Supply System The extent of the wider Ashley Rural supply area is shown in Figure 1. The Ashley Main intake is from seven shallow bores that are directly recharged from the Ashley River. These are bores M34/0674, M34/0673, M34/5772, M34/5773, M34/5774, M35/11523 and M35/11524. The taking of groundwater from these bores is consented under CRC161302. Figure 6 below shows the locations of the bores, and Figure 7 shows the area serviced by the Ashley Main supply.

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Figure 6: Ashley Main Lower Sefton Rd Intake Points

Figure 7: Area serviced by the Ashley Main Intake

For Ashley East, CRC980468 authorises deep groundwater to be abstracted from bore M34/0340, however this bore is no longer used for potable water supply. This bore is kept for emergency purposes and tanker use, and its location is shown in Figure 8. For the Ashley North, deep groundwater is abstracted from Racecourse Road bore M34/5707 under CRC175709 (which also provides for one additional

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proposed bore) and Kowai River Road bore M34/5541 under CRC011428. The locations of these bores are shown in Figure 9 and Figure 10 respectively. For Leithfield Beach, the location of the Leithfield Beach bore, BW24/0051, is shown in Figure 11. Abstraction from this bore is consented under CRC135138/CRC164844.

Figure 8: Ashley East Smiths Rd Intake Point

(Note: as indicated above, this bore is no longer used as a drinking water supply)

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Figure 9: Ashley North Racecourse Rd Intake Point

Figure 10: Ashley North Kowai River Rd Intake Point

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Figure 11: Leithfield Beach Deep Bore

The Ashley Main supplies the area from the Ashley River to the southern side of the Kowai River, covering the Ashley/Sefton/Loburn zone. Water is abstracted from seven shallow bores at Lower Sefton Road adjacent to the Ashley River, abstracting shallow water from an unconfined aquifer that is linked to the Ashley River. Water is conveyed by a pumped pipe network, and the water is primarily used for potable water, stock water and domestic use. Before treatment the abstracted water passes through an aeration tower and is stored in four buffer reservoirs. Thereafter the water is disinfected via MIOX and UV treatment. A schematic of the Ashley Main supply is provided as Figure 12 below. For the Ashley South/Ashley Main intake area (water abstracted from the seven shallow bores under CRC161302), the estimated population supplied is 4,527 with 1,132 connections. Between 1 January 2013 and 20 February 2019, the average demand for the Ashley South/Ashley Main area was approximately 2,000 3/day, and the peak demand was 3,577 m3/day.

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Figure 12 : Ashley Main Water Supply Schematic

3.2 Existing and Future Demand for Water The existing peak and average demand for the Ashley Main are 3,577 m3/day and 2,000 m3/day respectively. The current consent (CRC161302) allows for the abstraction of water from the seven shallow bores at a rate of up to 70 L/s and up to 6,000 m3/day. Therefore the current maximum demand and average demand are approximately 60% and 33% of the consented maximum daily volume respectively. Section 2.1 of this report summarises projected population increase in the Hurunui District, and for areas in the Waimakariri District serviced by HDC’s water supply. For the wider Ashley Rural scheme area (which includes Leithfield, Sefton, Loburn and Ashley), Council has allowed for $3,551,500 of capital projects over the next 10 years for the costs associated with increased demand associated with the projected population increase. The capital expenditure is further broken down by scheme in Section 2.5, Table 8. Section 2.2 described the budgets allowed for by Council associated with the DWSNZ. The 2010 amendments to the Local Government Act 2002 has signalled a nationally agreed set of Levels of Service to be incorporated in the development

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of the Long Term Plan (LTP). The mandatory performance measures and Council’s latest performance up to 2016/17 are described in Section 2.6. Council will continually assess its performance against these measures, and moreover continue to undertake annual Residents Satisfaction Surveys. 3.3 Water Conservation Methods, Efficient Use and Minimising Water Losses The Ashley Main water supply is restricted which requires individual connections to have their own reservoir tank (proving at least 3 times the storage capacity for their daily allocation). Users are allocated a set number of units which they can purchase from the Council. Table 12 below provides a Demand Management Strategy to conserve water and reduce water loss. The Demand Management Strategy identifies various strategies with varying levels of priority.

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Table 12: Demand Management Strategies

Strategy Objective/Description Priority

Demand Actively monitor current demand in all water schemes, 1 Monitoring including for flow metering Identify water scheme target consumption in terms of L/property/day for the purposes of benchmarking

Water Losses Quantify the current level of water loss for each water supply 1 and to determine if leakage is an issue (where possible) Unaccounted Identify target minimum night flow for each scheme and use for Water Use as a trigger for when Council needs to initiate investigations (e.g. leakage detection or other control measures) Use the purchased leak detection equipment to gain some meaningful insights into leaks per kilometre (performance criteria for pipeline replacement strategy)

Operations System Pressure Management Pressure measurement is being 1 done throughout the on-demand networks to enable changes that will reduce operating pressures which impact on reticulation and reduces water losses. This needs to be balanced with Levels of Service with the consumer on adequate pressure Variable speed drives have been installed at pump stations that were experiencing excessive pressure surges

Pipe Continue to utilise pressure management as a means of 1 Infrastructure extending pipe asset operational life Undertake condition assessment of critical asbestos cement (AC) pipes nearing the end of their predicted useful life Progressively fund renewals programme for replacement of necessary pipe lines, based on accepted strategy by Council.

Education Educate the public on the Council’s Water Management 2 Strategy:

• benefits of private storage

• reducing water usage and wastage

• health risks associated with possible contaminated drinking water

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Table 12: Demand Management Strategies

Strategy Objective/Description Priority

Water Charges Continue universal metering and install water meters on all 2 industrial and urban users in Leithfield Beach. This strategy is seen to help in terms of demand management although universal metering has a significant capital and operating costs that may not provide the long-term benefits of demand reduction. It has been observed that the consumption in metered areas is lower than the nonmetered areas.

Water Historically water restrictions have not been required, but 2 Restrictions have been introduced over the past two years (precautionary through Summer months with high water demand) Develop and adopt Water Restriction Management Plans appropriate for each water scheme. Maintain the Water By-Law to ensure prudent use and require consumers to comply with any water restrictions publicly advertised during droughts, periods of unusually high demand or emergencies.

Scheme Design Maintain hydraulic models of water schemes to allow capacity 2 assessments against current and future growth forecasts to be carried out.

Land Use Continue to actively incorporate impact of land use changes 2 identified in the District Plan into water demand forecasting.

Climate Change Continue to monitor climate and weather change forecasts for 2 the district, and subsequent impact on water demand (irrigation) and availability quantity and quality (river extraction intake sites).

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For Demand Monitoring (Priority 1), Council’s new service delivery officer monitors tanks and verifies that restrictors have the correct maric flow control valve for their allocated supply. In order to quantify water losses (Priority 1), Council is installing water meters on currently unmetered water mains to help determine losses in the Ashley Main network. With respect to pipe infrastructure (Priority 1), Council has a pipe renewal and facility renewal programme, as well as an operation and maintenance programme, which help to provide the required hydraulic performance and Level of Service and in doing so also help reduce the potential for losses. For the wider Ashley Rural scheme, Council has allowed for a water main renewal profile as indicated below in Figure 13, and an asset renewal profile as shown in Figure 14. The annual replacement costs are shown on the left axis and the 10 year average replacement cost is shown on the right axis. $1,820,100 has been allocated for pipe renewals and $1,337,873 for facilities renewals for the Ashley Main over 10 years.

Figure 13 : Water Main Renewal Profile for Ashley Rural Scheme 2018 – 2099

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Figure 14 : Facilities Renewal Profile for Ashley Rural Scheme 2018 - 2099

Section 0 summarises the budgets allocated for operation and maintenance of Council’s water supplies. The 10 year budget allocated to the wider Ashley Rural scheme area is summarised in Table 6, of which approximately 60-70% is allocated to the Ashley Main. The operations and maintenance aims to achieve optimum use of the water supply asset, and together with the asset renewal programme, will help to minimise water losses in the network and thereby conserve water and help ensure efficiency of water use. With respect to scheme design (Priority 2), Council has allocated funds as outlined in Section 2.5 for hydraulic modelling of the Ashley Rural scheme. With respect to education (Priority 2), Council has publicised portions of its Water Management Strategy to the public. In addition, Council lists water saving tips for the public on its website (http://www.hurunui.govt.nz/services/water- and-sewerage-services/water-saving-hints/). A Drought Management Plan has been prepared for the Ashley Main take, and is presented in Section 3.5 of this report. This requires restrictions be put in place when flows in the Ashley River fall below the A Block minimum flow, and includes measures such as a total ban on irrigation/watering of landscaped areas at residential and commercial properties. The measures are communicated to the public via public education, public notifications, social media and Council’s website. Council’s AMP includes an Improvement Plan, which has been developed to maintain or improve the Water assets and the service of the Water asset. This includes requirements that the AMP to be audited and reviewed on an on-going

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basis, as summarised in Section 2.7. The AMP also includes performance targets with respect to levels of service, which are summarised in Section 2.6. 3.4 Alternative Water Sources When the previous Ashley Main take consent was applied for (CRC980467.1), the seven shallow bores (the bore field) was considered to be the most viable source of water for this supply. HDC previously investigated alternative sources in the Saltwater Creek/SH1 bridge area in 2010, however found this location to be unsuitable due to the potential for saltwater intrusion. 3.5 Drought Management Plan Table 13 below provides a Drought Management Plan to reduce water consumption during times of low flow.

Table 13: Drought Management Plan

Flow Rate Trigger Level Demand Management During Method of Communication – Ashley Rakahuri River Restriction

A Block minimum flow 1. No more than 250 l of water Continuous public education: when Ashley River flow provided to each person per day. - Public notifications to is below: To achieve this the following conserve water; actions will be undertaken: • Jan-Jul: 2,500 L/s - Notices on social media incl. - Total hose ban for domestic • Aug-Nov: 4,000 L/s Council’s website home page. use; • Dec: 3,000 L/s - E-mail or letter drop to - All irrigation, car washing, consumers prohibited; These methods of - Reduction in domestic water communication will also be use e.g. 3 minute showering, used when flows approach the toilet flushing only when flow trigger levels to ensure necessary etc. that the scheme users are 2. Stock water use limited to aware of any upcoming peak daily water requirements as restrictions. specified in Schedule WQN11

Current water restrictions for the district are published on Council’s website http://www.hurunui.govt.nz/services/water-and-sewerage-services/water- restrictions-in-the-hurunui-district/. With respect to compliance and enforcement measures, Council uses its compliance officers to verify that consumers comply with the restrictions as per the drought management plan. In

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addition, Council is currently reviewing its Water Supply Bylaw 2014. Under the proposed Three Waters Services Bylaw (currently under review), for all restricted schemes such as the Ashley Main all consumers must have the capacity to store at least three days’ supply according to their allocation.

4.0 References HDC. (2006). Ashley Main Intake, Ashley Water Network, Public Water Suply. Hurunui District Council. HDC. (2010). Ashley Main Intake Rural Water Network, Public Water Supply, Update/Revision #1 Dec 2004 - May 2010. Hurunui District Council. Opus. (2018). Hurunui District Council Water Asset Management Plan 2017. Opus International Consultants Limited.

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HURUNUI DISTRICT COU NCIL - CONSENT VARIATION TO TAKE AND USE GROUND W A T E R - ASSESSMENT OF ENVIRO NMENTAL EFFECTS

Water Restriction Management (Ashley Rakahuri River)

Flow Rate Trigger Level Demand Management During Method of Communication – Ashley Rakahuri River Restriction

A Block minimum flow 1. No more than 250 l of water Continuous public education: when Ashley River flow provided to each person per day. - Public notifications to is below: To achieve this the following conserve water; actions will be undertaken: • Jan-Jul: 2,500 L/s - Notices on social media incl. - Total hose ban for domestic • Aug-Nov: 4,000 L/s Council’s website home page. use; • Dec: 3,000 L/s - E-mail or letter drop to - All irrigation, car washing, consumers prohibited; These methods of - Reduction in domestic water communication will also be use e.g. 3 minute showering, used when flows approach the toilet flushing only when flow trigger levels to ensure necessary etc. that the scheme users are 2. Stock water use limited to aware of any upcoming peak daily water requirements as restrictions. specified in Schedule WQN11

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