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Pipeline Condition and Asset Management Chesapeake AWWA – When it Breaks, it Pours January 16, 2014 Ian Mead P.E., BCEE Providence, RI

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Pipeline Condition and Asset Management

Chesapeake AWWA – When it Breaks, it Pours January 16, 2014

Ian Mead P.E., BCEEProvidence, RI

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Agenda

• Why is This Important?• Asset Management Framework and Risk• The Condition Assessment Toolbox• Case Studies• Wrap Up

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Why is This Important?

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When it Breaks, it Pours

• Los Angeles Sept. 2009

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When it Breaks, it Pours

• Atlanta GASept. 2009

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When it Breaks, it Pours

• Washington D.C. 2008

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• Providence, RI  1996

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A Wake-Up Call To Utilities

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Approach: Condition Assessment and Asset Management Programs

Defensible & Sustainable 

CapitalPlanning

• Review existing information• Determine remaining service life and renewal needs for pipes

• Desktop probability of pipe failure/condition analysis• Review pipe assessment tools and approaches

• Location of buried facilities• Verification of high points• Preparatory field work 

(excavations, pipe access, soils, and water)• Procurement of appropriate technology vendors• Implementation of pipe assessment tools

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New Prioritization Approach is a Continuous Process

Capital Plans

GIS Data

Hydraulic Model

O&M DataField Samples

Anecdotal Data

Innovyze CapPlan®

Riva DS 

Defensible & Sustainable 

CapitalPlanning

Casses/LEYP

ManagementStrategies

KANEW

ASSET CONDITION RANKING

SERVICE LIFE ANALYSISDATA GAP REVIEW

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0

1

2

3

4

5

6

2011

2023

2035

2047

2059

2071

2083

2095

2107

2119

Lined DI – 1976 ‐Present

Lined DI 1968 –1975

Lined Cent CI ‐1957 ‐ 1975

Lined Cent CI ‐1936 ‐ 1956

• Service Life Analysis ‐ KANEW– How much is required over time?– Budget impacts shown over time

• Statistical Failure Analysis– What do past breaks/condition say about existing pipe condition?– How strong are correlations and which factors have greater affect on pipes?

• Micro Modeling –Innovyze CapPlan©, Riva DA or Others– Weigh the various parameters that impact renewal– Produces a list of pipe segments for renewal 

or inspection

Using Advanced Tools for Inspection Prioritization

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Condition Assessment Toolbox

• Visible Structural Defects‐ CCTV video of all pipe types‐ Valve location and operation

• Finding Pipe Locations & Voids‐ GPR,  Potholing, PPR

• AC Pipe Issues• Leaks 

‐ All pressure pipe types

• Wall Thickness Degradation‐ Corrosion of Metallic Pipes 

• Loss of Wire Prestress‐ PCCP

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Leak Detection Tools 

• Pure Technologies– Free Swimming with SmartBall– Tethered with Sahara (Pipe Wall Assessment and CCTV)

• Wachs– Acoustics and CCTV from valve, hydrant, or tap– Assessment and exercising of valves

• Echologics– Acoustic leak detection– Acoustic condition assessment

• Other– Correlators, ground microphones

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Wall Thickness Tools

‐ External vs. Internal?‐ Destructive vs. NDT?

• Ultrasonic/Impact Echo (NDT Corp)• Electromagnetics/BEM/Magnetic Flux Leakage (PICA, 

InfraMetrix)• Coupons/Coating Tests• Corrosion Assessments/Sampling

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PCCP Wire/Pipe Assessment Tools

• Electromagnetics (EM – Pure Technologies)• Resistance Testing• Coupons/Wire Tests• Corrosion Assessments/Sampling• Fiber Optic/Acoustic Monitoring of Wire Breaks

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Free Swimming Inline Leak and Gas Pocket Location: SmartBall™

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Investigator™

Wachs Leak Detection

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LDS1000™ by Wachs Water ServicesCondition Assessment of Large Diameter Transmission Mains

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Acoustic Condition Assessment

• Acoustic signals induced in pipe by flowing water or acoustic exciters

• Velocity of acoustic wave is measured, wall thickness is calculated from propagation delay

• Calculated wall thickness is average value for pipe section along which velocity is measured,  typically 300 – 400 foot long sections

Noise Source

Measure soundvelocity

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Ultrasonic Investigations

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Ultrasonic (Echo Impact) Investigations of PCCP

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Sonic/ Ultrasonic / Impact Echo Measurements

Full ThicknessPipe Resonance No Resonance Coating Thickness

Resonance

Impact

Sensors

Micro-crackedArea Delamination

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SONIC/ULTRASONIC  DATA ANALYSIS

Determines Condition of each pipe section

•Concrete Strength parameters•Core Cracking•Pipe thickness

Coating delamination Erosion

Inner core delamination•Location and severity of deterioration

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PICA Sea Snake for Ferrous Wall Thickness  and Pitting 

• Ferrous pipe sizes from 4” diameter to 78” diameter.  

• Under pressure or in a drained pipeline. 

• Measures changes in wall thickness. 

• Detect localized pitting and general corrosion

• Can see corrosion on both the interior and the exterior of the pipe.  

PICA reports the location and the severity of each defect. 

6” tool

20‐28” SeeSnake tool

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PCCP Wire Break Assessment and Monitoring

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Robotic EM Assessment

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Manned EM Inspections

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Free Swimming EM Tool

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Wire Resistance Testing

Electric Resistance Measurements Between Adjacent Wires

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Pipe Penetrating Radar

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Condition Assessment Programs

• Assessment Report– “Real Time” Pipe Condition at Test Locations– Modification of Criticality Analysis (LoF, CoF)– Optimization of System (ARV, Blowoffs, etc.)

• Recommendations for CIP Projects • Develop Emergency Response Plan

– Catastrophic and Critical Pipe Failures– Mitigation of Environmental Impacts– Remediation of Property Damage

• Define or Modify Preventative Maintenance Program

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• Large Water Utility• Impact Echo• Visual Inspection• Hammer Sounding• Soil and Groundwater Testing

• Electromagnetics 

• Large Diameter PCCP• Failure Risk curves• Fiber Optic Monitoring • Rehabilitation• 5‐year Cycle• $1M CA Program

Case Study ‐ RI

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• Large Water Utility• Impact Echo• Visual Inspection• Hammer Sounding• Electromagnetics for PCCP 

• Acoustic Leak Detection

• Large Diameter Water Transmission Mains

• Tethered Leak Detection• CFRP Repair• Joint Seals• Follow Up Inspections• $500k

Case Study ‐MA

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• Large Sewer Utility• Pump Station Upgrades• Surge Analysis• Soil and Groundwater Testing 

• $800k

• Various Diameter PCCP• Failure Risk curves• Acoustic Leak Detection• Acoustic Pipe Integrity Testing

Case Study ‐ NY

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• Large Water Company• Risk Prioritization• Various Diameter PCCP• Evaluate CA Tools• Phased Implementation

• Water Authority• Multiple Types and Diameters

• Pilot Technologies• Risk Prioritization• Evaluate All Assets• Master Plan

Case Study ‐ NJ Case Study ‐ HI

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Wrap Up

• Be Prepared• Evaluate Asset Management Framework• Know Your Toolbox• Be Proactive

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Questions?