using gis to prioritise capital investment for water main

Using GIS to Prioritise Capital Investment for Water Main Renewals

Presentation to the 2014 ESRI International User Conference (Jim Carlson-Jones, SA Water)

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Presentation Outline

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• SA Water Overview • Asset Management Context • SA Water Capital Plan

Background • SA Water Asset Information

Framework • Water Main Data Fundamentals • Automated Valuation System • Water Main Renewal Planning

Models • Key Performance Indicators • Closing

SA Water Overview

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• Vision to “deliver safe, sustainable and affordable water services for the community”.

• Serving 1.5million residents • 1500 employees • $430 million capital expenditure

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SA Water Infrastructure Assets (at 30 June 2013)

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Key Asset Management Concepts

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Optimised Life Cycle Decision Making (OLDM)

Capital Plan

Maintenance Plan

Operating Plan

Assets OLDM Plans Information + + =

LoS

Risk

LCC

RBP2016 Capital Plan – Asset Categorisation (Water)

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Asset Programs Mapped to Strategic Key Performance Outcomes (Water)

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Asset Information Framework

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• Asset Knowledge Standards • Asset Information Systems • Asset Data and Knowledge • Asset Information Strategy

Asset Information Systems • GIS • Maximo • Fixed Asset Register • Enterprise Data Warehouse (EDW) • River (SharePoint)

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Some Fundamentals

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Some Fundamentals

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Some Fundamentals

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Some Fundamentals

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Some Fundamentals

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Poor Performing ShutOff Blocks

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Poor Performing ShutOff Blocks

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Automated Valuation System

Calculates & Assigns: • Gross Replacement

Value • Written Down Value • Age • Remaining Life • Infrastructure Zones • ….and many other

attributes For each pipe segment • Approx. 1,000,000

segments

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Reticulation Water Main Asset Renewals – Background

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• Two complementary models are in use • In each case, a level of annual investment in pipe renewal is

predicted over a set planning period. • A Water Main Prioritisation Tool is then applied using actual

failure performance to determine which mains should be prioritised for replacement.

Reticulation Water Mains - Tactical Asset Management

• Nessie and PARMS long term modelling - target length (and $) proposed from year to year

• Water Main Prioritisation Tool (WMPT) - water mains ranked in terms of priority for replacement.

• Problematic locations are identified using the GIS and Maximo WMS data.

• These locations are scrutinised in more detail to optimise the length to be replaced.

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NESSIE - Water

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Pipeline Asset Risk Management System (PARMS)

– CSIRO software known as PARMS (Pipeline Asset Risk Management System) has been brought up to ‘modern’ computer language through WSAA Asset Management Project PPS10 – Water Main Renewal Planning.

– PARMS enables various long term expenditures to be modelled and assess impact on failure rates

– PARMS used for long term renewal forecasts and identification of short term priorities to justify expenditure to the regulator using ‘best practice’ software.

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Reticulation Water Main Assets – PARMS Forecast v Actuals

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2002

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Annu

al L

engt

h Re

plac

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m)

Regional Length of Water Main Replacements to Maintain Constant Failure Rate (Indicative Only)

PARMS Estimated Length to Keep Failure Rates Constant (km)

Actual Lengths Replaced (km)

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2001

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Annu

al L

engt

h Re

plac

ed (k

m)

Metro Length of Water Main Replacements to Maintain Constant Failure Rate (Indicative Only)

PARMS Estimated Length to Keep Failure Rates Constant (km)

Actual Lengths Replaced (km)

Reticulation Water Mains - Tactical Asset Management

• Water mains are identified for WMPT scoring via 2 primary methods: – Shutoff block reporting: Spatially joins water main failures to pipes; count of

number of failures by a shutoff block; any shutoffblock with >= 3 failures in a rolling 12 month period are considered

– Maximo burst reports: Count of number of failures by Maximo location

• WMPT scoring ranks these mains until the annual target length of WMR is reached.

• The higher the WMPT score, the higher the priority for replacement.

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Reticulation Water Mains - Tactical Asset Management

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Water Main Performance - Adelaide

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y = 0.0663x4 - 2.5011x3 + 31.51x2 - 140.4x + 312.96 R² = 0.9721

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Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

Num

ber o

f Fai

lure

s

Month

Monthly Water Main Failure Rates Average (past 11 years)

2008-2009

2009-2010

2011-2012

2012-2013

Poly. (Average (past 11 years))

Water Main Performance - Adelaide

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Drought

Corporate KPI – Water Network

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Water Main Performance - Adelaide

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Closing

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My Contact Details

Jim Carlson-Jones Manager, Asset Information South Australian Water Corporation Email: jim.carlson-jones@sawater.com.au

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