water services training group
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Water Services Training Group. 13 th Annual Conference 10 th September 2009. Prioritising Mains for Rehabilitation/Replacement – Large Rural Areas. Gerard Gibney Managing Director. Introduction. Mains Rehabilitation/Replacement - Why? Large Rural Areas Prioritisation - PowerPoint PPT PresentationTRANSCRIPT
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Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Water Services Training Group
13th Annual Conference
10th September 2009
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Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Prioritising Mains for Rehabilitation/Replacement – Large Rural Areas
Gerard GibneyManaging Director
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Introduction
Mains Rehabilitation/Replacement - Why?
Large Rural Areas
Prioritisation
Key issues for Effective Mains Rehabilitation/Replacement
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Why implement Mains Rehabilitation/Replacement?
On one hand: Budgetary Constraints
But: Water Networks:
Do Breakdown/Deteriorate Do Require Maintenance Do Require Replacement/Rehabilitation
Failure to manage networks based on least life cycle cost strategies will result in increased cost over the long term.
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Asset Life Time Costs
Annual Cost of ReplacementAnnual Cost of Replacement
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Annual Maintenance Cost
Asset Life Time Costs
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Whole Life Cost = Cost of Maintenance + Cost of Replacement
Minimum Whole Life Cost
Asset Life Time Costs
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Value for Money
In the current economic environment value for money is paramount
Targeted Spending - Cost Effective Systematic and structured approach Asset Management
Most Efficient Repair/rehabilitation: Planned Repair/Rehabilitation 70-80% Reactive Repairs/Rehabilitation 20-30%*
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
* Thinking, Getting and Staying Competitive: A Public Sector Handbook, Association of Metropolitan Sewerage Agencies and Association of Metropolitan Water Agencies, 1998
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Asset Management
Initially Asset Management requires the development of:
Asset Inventories (CIS - a good starting point)
Critical Asset Lists (For water networks this is a product of Stage 1 and
Stage 2 Works – L6/07)
Stage 3 Water Conservation vital part of Asset Management
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Internationally -What Others are Doing ?
US Projections - $100’s bn for water infrastructure over the next 20 years
Hong Kong - $ 2.5 billion Project UK Water Companies rehabilitated
4,565Km (>1%) of Water Mains in the 2006-2007 period.* 1,489Km Relined* 3,076Km Replaced** From “Financial performance and expenditure of the water companies in England and Wales 2006 -2007 report” by OFWAT
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Case Study – Greater Berlin Water Supply System
West Berlin vs. East Berlin (pre-reunification) where systematic network replacement (circa 1% p.a) had been carried out in West Berlin but not East Berlin:
Bur
sts
per
Km
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1991-2005 (Systematic replacement of network in East Berlin circa 1.5% p.a; West Berlin circa 0.65%; OA 0.8-1%)
Bur
sts
per
Km
Case Study – Greater Berlin Water Supply System
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Case Study – Greater Berlin Water Supply System B
urst
s pe
r K
m
Cast Iron
Notice that 20-40 year old cast iron was bursting more frequently than 50-80 year old.
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Case Study – Greater Berlin Water Supply System
After studies and large initial investment Berlin Water calculated that the optimum replacement requirement over 10 years was 0.25% per year (OA 0.375% p.a).
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How do we compare ? Irl in an International Context (using Infrastructure Leakage Index
(ILI))
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Why implement Stage 3?
International Findings: Netherlands: – Annual Investment
€507m (1997) to €341m (2007)
“…. emphasis on quality investments …decisions to replace pipelines are based on better information provision (smart asset management)” - Vewin
Water Company, Water Supply Statistics (2007)
‘SMART ASSET MANAGEMENT’
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Mains Rehabilitation - L6/07
“Rehabilitation of watermains….address different problems e.g. leakage, security of supply, quality, flow restriction etc.….. Water Conservation is the primary objective…………….’
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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National Water Conservation Programme
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Stage 1 Stage 2
WSTG Training
Stage 3 – Rehabilitation
Commenced
} Advanced
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National Water Conservation Programme - ProgressUFW Summary (%)
05
10152025303540455055606570
Dub
lin T
otal
Dub
lin C
ity
Dun
laoi
ghre
Fing
al
Sout
h Dub
lin
Wickl
ow
Bray
Kild
are
Car
low
Cav
an
Cla
re
Cor
k City
Cor
k Cou
nty
Don
egal
Gal
way
City
Gal
way
Cou
nty
Kerr
y
Kild
are
Kilk
enny
Laoi
s
Leitr
im
Lim
erick
City
Lim
erick
Cou
nty
Long
ford
Lout
h
May
o
Mea
th
Mon
agha
n
Nor
th T
ippe
rary
Off
aly
Rosc
omm
on
Slig
o
Sout
h Ti
pper
ary
Wat
erfo
rd
Wat
erfo
rd C
ity
Wes
tmea
th
Wex
ford
Wickl
ow
Suggested Target Level of UFW from NWS (25%) Average Level of UFW 2008 (44%)
Water Conservation in Ireland
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
44%
Extract from WSTG Guidance Manual “Network Management – Leakage Control”
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Current Situation In Ireland- Volumes of UFW
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Leakage Management
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Pressure Management• Reduce new break frequencies• Reduce real losses
Demand Management• Consumer metering• Water efficient fixtures• Public awareness
Active Leakage Control• DMA Monitoring • Leak Detection• Leak Repair
Pipeline and Assets Management
• Selection• Installation• Maintenance• Renewal• Replacement
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Asset (Network) Size
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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L6/07 Prioritisation Strategy
Rehabilitation Strategy Current status of Water Conservation
Programme Identify critical DMAs (Prioritise by DMA)
Rehabilitation Works Proposals Assessment of mains (Prioritise Mains) Develop work packages
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Effective Prioritisation of Works
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Information – Key!
Stage 1 & 2 Works – Ongoing Active Leakage Control Pressure Management Demand Management
Data Management Systems CiS Leak Repair Database Telemetry Systems Non-Domestic Metering
Resources Project Management Team Leak Detection Teams Leak Repair CiS Maintenance
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Information – Key! - Rural Water Programme Experience
Challenges in GWS Rural Water Sector High UFW Limited Fittings – Stoptaps, Valves Poor Information – Location, Bursts, Fittings Limited Resources – Part-time caretakers High Ratio of length of service connections/length of
distribution mains Shared Service Connections
Advance Works – Installation of Stoptaps; to determine extent of distribution
side and consumer side leakage Installation of DMA meters and valves; to identify sections of
distribution mains with high leakage
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Information – Key! - Rural Water Programme Experience
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Demand Management
Mains Rehabilitation
Active Leakage Control + Pressure Management
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Effective Prioritisation of Works
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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L6/07 Prioritisation Strategy
Prioritise by DMA Characteristics of Mains Connections Structural and Leakage Performance Water Quality Hydraulic Performance
Prioritise Mains Burst Frequency Leakage Physical Condition Soil Corrosivity Head Loss Age Importance
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Rehabilitation Strategy Reports - Prioritisation of DMA’s
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Rehabilitation Strategy Reports Prioritisation of DMA’s
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Prioritisation – Sample Counties - % UFW
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
•Based on Countywide Rehabilitation/Replacement Reports and Projects
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Prioritisation – Sample CO’s % Rehabilitation
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
•Based on Countywide Rehabilitation/Replacement Reports and Projects
Replacement: 0.8% to 1.1% p.a.
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Effective Prioritisation of Works
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
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Implementation-Rehabilitation / Replacement Works
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Detailed Design
Outline Design
Site Investigation
Archaeology Ecology Consent Licence
Construction Works
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Effective Prioritisation of Works
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
Value Value ForFor
MoneyMoney
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Conclusions/Summary
Information is Key ! Stage 1 & 2 – ‘Mainstream’ Cost Effective Targeted Spending Stage 3 – Mains Rehabilitation
‘‘SMART ASSET MANAGEMENT’SMART ASSET MANAGEMENT’
Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009
‘‘VALUE FOR MONEYVALUE FOR MONEY’’