the Dutch way to keep the achievements of a distribution system on an acceptable level in the 21 st century 2014 Danube Water Conference Peter Horst (asset engineer at PWN Water Supply The Netherlands)

content 1. basic figures of PWN 2. the Asset Management landscape 3. replacement of mains to keep the stakeholders satisfied 4. a sustainable asset organisation

content 1. basic figures of PWN 2. the Asset Management landscape 3. replacement of mains to keep the stakeholders satisfied 4. a sustainable asset organisation

the Dutch water supply companies

94 years history

water distribution without chlorine +H 2 O 2

the most valuable asset MATERIALLENGTH [km] AC4.322 CONCRETE372 CI656 DI503 STEEL189 COPPER28 GRP55 PVC2.301 PE1.894 total10.320

Key Performance Indicators AM-mains Key Performance Indicators of Asset Management in 2012 effectivenessefficiency % NRW5,1 %# personnel fte department AM0,015 per customers # Customer Minutes Lost (caused by ruptures of mains) 4,4 minutes per year€ CAPEX (replacement)€ 502 per km # ruptures of mains (pipes and joints)0,033 per km€ OPEX (mains)€ 793 per km # complaints about pressure0,009 per year per customers # complaints about waterquality0,5 per year per customers

NRW at PWN ILI < 1,00

content 1. basic figures of PWN 2. the Asset Management landscape 3. replacement of mains to keep the stakeholders satisfied 4. a sustainable asset organisation

the Asset Management landscape

Data Control

Safety Health Environment Quality

Outsourcing

Cost Control

Spare Parts Control

Skill Control

Asset Performance

Preparation of Maintenance

Execution of maintenance works

Reliability Engineering

Portfolio Management

Project Management

content 1. basic figures of PWN 2. the Asset Management landscape 3. replacement of mains to keep the stakeholders satisfied 4. a sustainable asset organisation

optimal moment of replacement age of the main costs rupture frequency / CML age [years]

Replacement Model software-tool / spreadsheet data network knowledge rules GIS data prediction YR individual mains prediction kilometers to be replaced prediction CAPEX prediction unplanned CML

determining the Year of Replacement Year of Construction Functional Lifespan = Year of Replacement maximum Technical Lifespan Social Lifespan effect rupture of main Reduction Lifespan - chance disfunctioning of main risk -

determining the Year of Replacement Year of Construction Functional Lifespan = Year of Replacement maximum Technical Lifespan Social Lifespan effect rupture of main Reduction Lifespan - chance disfunctioning of main risk

Technical Lifespan 0,0% 0,5% 1,0% 1,5% 2,0% 2,5% 3,0% replaementpercentage per year (100% = whole group) age [years]] for groups of mains common knowledge of asset management experts t1 t2 t3

determining the Year of Replacement Year of Construction Functional Lifespan = Year of Replacement maximum Technical Lifespan Social Lifespan effect rupture of main Reduction Lifespan - chance disfunctioning of main risk

Social Lifespan 0,0% 0,5% 1,0% 1,5% 2,0% 2,5% 3,0% replaementpercentage per year (100% = whole group age [years] main in a primary dyke main nearby a sensitive consumer main in quiet environment decisive effect Social Lifespan

determining the Year of Replacement Year of Construction Functional Lifespan = Year of Replacement maximum Technical Lifespan Social Lifespan effect rupture of main Reduction Lifespan - chance disfunctioning of main risk

example: determining Year of Replacement 1960 = group 3: 90 years 70 years primairy dyke 15 years - groundwater + 5 trees case: main 100 mm AC constructed in 1960 in primary dyke in acid ground in groundwater < 1 m of 5 trees 55 years

results of prioritisation for the short term

steps to determine the length of mains to be replaced step 1 Examine the maximum rupture-frequency a customer accepts. step 2 Determine at which age this rupture-frequency is reached. step 3 Determine the length of mains to be replaced if each main is replaced at this age. step 4 Equ ilize the am oun t of mai ns to be repl ace d and add mai ns whi ch sho uld be rec onst ruct ed eac h year.

step 1: examine the maximum rupture-frequency How many times per year may we NOT deliver water for about 3 hours?

step 2: at which age this rupture-frequency is reached

step 3 & 4: prediction of length to be replaced

the AM-triangle costs (CAPEX+OPEX) performance (CML+NRW) Infrastructure (mains/installatio ns) risks for environment (effect x chance)

prediction CAPEX and OPEX

prediction achievement :CML / NRW

risk for the environment of the main

prediction of risk in virtual euro’s

content 1. basic figures of PWN 2. the Asset Management landscape 3. replacement of mains to keep the stakeholders satisfied 4. a sustainable asset organisation

asset roles asset owner asset manager service provider

asset roles in The Netherlands Board of Directors of water company asset management department of the water company operational department of the water company

asset roles at PWN (distribution only) 1 director + 4 sector directors asset management department 1 staff + 12 asset engineers 5 staff 15 project leaders 25 assistants 6 draftsmen 30 fitters

the stakeholders of distribution 1 director + 4 sector directors asset management department with 13 asset engineers 5 staff 15 project leaders 25 assistants 6 draftsmen 30 fitters shareholder: province inspector government EBC- benchmark waterboards sewage department municipalitiy fire fighting department municipalities landowners public/private 6 suppliers of material 3+3 contractors research institutes laboratory other utilities

the stakeholders of distribution 1 director + 4 sector directors asset management department with 13 asset engineers 5 staff 15 project leaders 25 assistants 6 draftsmen 30 fitters shareholder: province inspector government EBC- benchmark waterboards sewage department municipalitiy fire fighting department municipalities landowners public/private 6 suppliers of material 3+3 contractors research institutes laboratory other utilities customers / households customers / business

This is how the Dutch keep the achievements of a distribution system on an acceptable level!