1. Renwick Water Metering
Public Consultation
21st of February 2017

2. MDC Representatives Councilors Cynthia Brooks Geoff Evans Gerald Hope
MDC Staff
Richard Coningham (Assets and Services Manager)
Stuart Donaldson (Planning and Development Engineer)
Apologies Stephen Rooney (Ops & Maintenance Engineer)
What are we here to discuss?
The benefits for installing water meters in Renwick
Should water meters be installed for Renwick

3. Topics Issues with the current water supply Pipe Replacement Program
Future Capital Upgrades
New Wells
New Reservoir
New Water Treatment Plant
Reducing Water Consumption
Proposed strategy
Costs
User charging
Your Input

4. 1. Issues with the current water supply
Capacity
Reduced capacity of the wells in summer
Increased household demand during hot, dry summers
Increasing population
Water restrictions
Water use is relatively high (719 l/p/d vs 450 l/p/d)
Leakage and losses - Dec 2016 survey
Water does not comply with the NZ Drinking Water Standards (NZDWS) for quality

5. 2. Pipe Replacement Program
9.5km of AC pipe in Renwick
Aggressive water in Renwick causing deterioration faster than normal in these pipes
Average cost to replace is $250/m (subject to contract negotiations)
Acceleration in replacements planned
150mm pipes to be replaced next 5 years
100mm pipes replaced over 11 years from 2022/23

6. 3. Future Capital Upgrades
New water Source
New wells have been drilled in Conders Bend Road
To be tested this winter to establish capacity and quality
Subject to testing and resource consent it is proposed the wells will be used for the town’s supply
New source cannot be used until treatment is installed
Likely to be more reliable source (testing to confirm)

8. 3. Future Capital Upgrades
New Reservoir
A new concrete reservoir is planned for 2017/18
Replace the existing nine small tanks that are old, insecure and require earthquake strengthening
Proposed capacity of 1530 cubic meters of water
This compares with average daily water demand of 1522 m3/d (2016). Peak summer day demand is 3500 m3/d
New reservoir will ease day time peak demand periods but supply still restricted by limitation of well capacity
To be located at existing treatment plant site

10. 3. Future Capital Upgrades
Water Treatment Plant Upgrade
Current water supply is chlorinated but does not meet the NZ Drinking Water Standards
Chlorine to be effective requires low turbidity water
Chlorine is not effective against protozoa e.g. Giardia
Future capacity requirements to be confirmed prior to upgrade.
Water treatment is currently budgeted for 2018/2020 following construction of a new reservoir in 2017/18
Range of design options will be considered to treat the water from new source to meet the standards

11. 4. Reducing Consumption Why the need to reduce water use?
Although the Conders Bend Road wells are likely to be more reliable than the existing wells, there remains valid reasons to reduce water use
Lessens capital costs of upgrades because the required capacity is reduced
Lessens operating costs
Improves prospects of resource consents for water abstraction

12. 4. Reducing consumption - Universal Water Metering
Where does the water go?
Typically, inside a New Zealand home, water use is broken down into:
30% - baths and showers,
30% - toilet flushing,
20% - kitchen use and
20% - laundry
This translates to between 180 and 250 litres per person per day, plus water used outside the house. Did you know that
a garden sprinkler can deliver up to 900 litres an hour
Summer garden water use can raise total average demand, inside plus outside, to 1,200 litres per person per day

13. 4. Reducing Consumption - Universal Water Metering
Rates – Renwick sample property rate charge 2016/2017
Under the Local Government Act - local assets can not be sold. Currently contract out services successfully.
Municipal supply set at 5000m³/d (Renwick) as stated in the MEP. This accounts for predicted future population growth and community expansion.

14. 4. Reducing Consumption - Universal Water Metering
CURRENT SITUATION:
National average l/p/d
This is equivalent to 4 baths per person per day.
Renwick 2015 annual average 869 l/p/d
This is equivalent to 7.5 baths per person per day.
Renwick 2016 has reduced to 719 l/p/d
Note – figures inclusive of leakage and losses in system.
 2015
Population on water supply
Annual Consumption
(m3)
Annual consumption
(m3/p)
Average annual consumption
(l/p/d)
Blenheim
24,196
6,320,397
261
715
Picton
4127
1,136,745
275
754
Renwick
2118
672,541
318
869
Havelock excl. Port
535
197,826
370
1012

15. 4. Reducing Consumption Current measures Proposed measures
Leakage surveys.
Results from December 2016 survey
Leaks = 3.3% of average day demand
2.1% on mains and 1.2% private
Call for voluntary restraint on water use in summer
Information provided to public to reduce consumption
Regular monitoring and feedback to public
Proposed measures
Universal water metering
More equitable method than restrictions

16. 4. Reducing consumption - Universal Water Metering
CURRENT SITUATION:
Last 6 months - overlay of 2015/2016

17. 4. Reducing consumption - Universal Water Metering
With user charging Universal water metering has been shown to reduce consumption by on average 25% - i.e. from 719 l/p/d to 539 l/p/d.
Kapiti – 26% reduction of Peak Day Demand (18 months)
Tauranga – 30% in Peak Day Demand, 25% in average day demand
Nelson City – 20% reduction, one of the lowest consumptions in the country 160 l/p/d
Reducing consumption further with water metering prior to capital investment will reduce construction and operating costs.

18. 4. Reducing consumption - Universal Water Metering
Manual Meter Reading
Manually read – estimated to take 3-4 days to read Renwick
Provides total over fixed period
Un-validated data i.e. human error inputting data
Lower capital costs
Higher maintenance costs
Automatic Meter Reading
Automatically read using a drive by device – estimated to take 1 hour to collect Renwick data
Automated data collection – no human error
Higher capital costs
Lower maintenance costs

19. 4. Reducing consumption - Universal Water Metering
Smart Meters
Data is automatically connected via transmitters to software
Provides instantaneous consumption which can identify when leaks occur
Automated data collection – no human error
Higher capital costs
Lower maintenance costs

20. 5. Proposed Strategy
Progress new water source – Conders Bend Road wells
Universal metering
Leakage detection and loss reduction
Bore to property boundaries – continue with sonar detection
Within property boundary – Metering
Pipe renewal program will also reduce leakage
Evaluate performance of the system
Review Renwick capacity requirements prior to confirming water treatment plant

21. 6. Costs Combined Water Scheme
From 01/07/2017 all capital costs of water schemes will be distributed across users of Council provided water.
Forecast Water Rates and Charges ($)
Due to the structure of the new scheme the costs of meter installation will be a ‘blip’ under the Combined Capital Water Scheme.
$50m capital budgeted for Marlborough water projects for next 10 years ( )
Council Water Scheme
Ave Property land Value
Actual Water rates
Forecast Water Rates in LTP
Combined Water Scheme Projection
Blenheim
$154,000
$440
$434
$562
Havelock
$136,000
$693
$2,609
$825
Picton
$119,000
$692
$845
Renwick
$476
$1,689
Seddon
$65,000
$441
$886
Wairau Valley
$93,000
$318
$503

22. 7. User Charging
Setting the correct tariff will be fundamental to the successful implementation of a metering programme. The right tariff needs to prevent people wasting water but not penalise vulnerable groups. Options may include:
Simple cost per m³ (1 m³ =1000 Litres)
Fixed charge (fixed operational costs) plus a volumetric charge for consumption – e.g. Nelson City
Block tariff structure where a certain volume of water is sold at a certain rate, as consumption increased above this ‘block’ the cost increases
Seasonal tariff, similar to a block tariff but the cost increases during a peak period of the year

23. 8. Your Input is Required
Do you want to progress water meters?

24. Next Steps
Report back to Council with findings from consultation and recommendations.