Watermain Rehabilitation

Eliminating the need for temporary bypass

Derrick Horsman, P.Eng.

Alltech Solutions INC

Overview

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Watermain problems and issues

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Spray Lining Overview

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Same Day Return to Service ?

Eliminating Temporary Bypass

The Problem: Despite recent increases in public infrastructure investments, municipal infrastructure is decaying faster than it is being renewed.

1

1 National Guide to Sustainable Municipal Infrastructure.

Eliminating Temporary Bypass

The Cause: Internal (External) corrosion Watermain breaks Pipe surpassed useful life

Eliminating Temporary Bypass

High Rate of Leakage Inadequate Fire Protection

Eliminating Temporary Bypass

Eliminating Temporary Bypass

Eliminating Temporary Bypass

What do we do?

Eliminating Temporary Bypass

 Conventional open cut replacement  Low dig options  Directional drilling    Sliplining Pipebursting CIPP lining  Traditional Cleaning and Spray Lining  Cement lining process  Epoxy lining process  Modern Cleaning and Spray Lining  Rapid cure polyurethane system  Rapid cure high build system

Eliminating Temporary Bypass

Spray Lining

TRADITIONAL CLEANING AND SPRAY LINING

Cement Lining process Epoxy Lining process

• Less expensive • • No reduction in flow capacity No requirement to re-tap services • • • Some disruption Not suitable for certain water types Superseded in Europe by polyurethane lining systems.

• Requires above ground temporary water supply $$$$$$$ ??

Eliminating Temporary Bypass

Spray Lining

TRADITIONAL CLEANING AND CEMENT LINING

Eliminating Temporary Bypass

Eliminating Temporary Bypass

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• Same day return to service • Only approved rapid cure material <15 sec • Potential for contamination effectively eliminated • No leaching • Immediate rectification of lining faults

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• Same day return to service • No requirement for above ground bypass • Improved customer services; multi-stage notification process • Operations carried out during working hours • Removes potential hazards (ie. Tripping hazards, random breaks, security issues)

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• Same day return to service • • No requirement for above ground bypass Substantially less expensive - cost of bypass 20-45% of total job (Awwarf) • Cost of temporary resources reduced • Shorter construction duration

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• Same day return to service • • • No requirement for above ground bypass Substantially less expensive Greatly reduced disruption • Minimal setup time • Rapid road reinstatement • Small job site footprint

Eliminating Temporary Bypass

Spray Lining Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• Same day return to service • No requirement for above ground bypass • • • • Substantially less expensive Greatly reduced disruption Some revaluation of capital asset?

No reduction in flow capacity • Application of 1mm – 5mm

Eliminating Temporary Bypass

Spray Lining

MODERN CLEANING AND SPRAY LINING

Rapid Cure Polyurethane system Rapid Cure High Build system

• • • • • • • Same day return to service No requirement for above ground bypass Substantially less expensive Greatly reduced disruption Some revaluation of capital asset?

No reduction in flow capacity No requirement to re-tap services

Eliminating Temporary Bypass

Spray Lining High Build Structural System

Performance Requirements for Lining Material

1. Tough enough to survive dynamic loading at failure 2. Ductile enough to accommodate movement after failure 3. Sufficient shear strength to maintain longitudinal continuity 4. Sufficient flexural strength to provide long term corrosion void spanning capability

Eliminating Temporary Bypass

Spray Lining High Build Structural System Semi-Structural Lining 6 5 4 1 0 3 2 2 4 6

1 Bar = 14.5 psi @3mm 145psi @5mm 348 psi

8 10 12 14 16 Operating Pressure (Bar) 18 20 22 24 Eliminating Temporary Bypass

Spray Lining – Rapid Cure Polyurethane

Rapid Cure Polyurethane North American Experience • City of Saint John, NB • City of Moncton, NB • Atlantic Health Sciences Corporation, Saint John, NB • Millstone Nuclear Power Plant, Niantic, CT, USA • Region of Niagara, ON • New York Department of Environmental Protection Rapid Cure Polyurethane International Experience • United Kingdom, Russia, India, Switzerland and Malaysia • More than 8,000 km in the UK by our partner affiliates

Eliminating Temporary Bypass

QUESTIONS ???

Eliminating Temporary Bypass