Social impact liabilities negative publicity bldg

Social impact
◼
Liabilities
◼
Negative publicity
BLDG 6921
Water main break on Pie IX Blvd.(12/08/02)
BLDG 6921

6
Water main break on Pie IX Blvd.(12/08/02)
BLDG 6921
Watermain break on Pie IX Blvd.
in numbers
 Water loss : 93 500 000 liters ( 93 500 m
3
)

Equivalent : 1850 pools (24 ft long)
 Flow at break : 8 000 litres/sec.

Equivalent : to filling a 24 ft pool in 6,25 sec.

Equivalent : to simultaneouly opening 150 hydrants
 22,000 Montrealers affected by loss of water;
 50,000 Montrealers affected by important loss of water pressure for fire
protection;
 Potable water distribution to population : 1 558 000 litres
 City personnel affected by the catastrophy : 450 employees
 40 houses flooded;
 102 911 calls received (first 8 hours);
 304 claims against the city
BLDG 6921

7
Costs Due to Water Loss and Breaks
( Potential Savings )
Hamilton Toronto Ottawa Rosemere
Year 2009 2009 2009 2005
Cost of water ($/m
3
) 1,03 1,89 1,26 0,32
Water loss (m 3 /yr) 21,808,750 48,000,000 3,700,000 1,054,270
Total cost from water
loss $22.6M $90.8M $4,7M $0.3M
Number of breaks 271 968 251 33
Cost per break $7,500 $10,000 $7,500 $5,000
Total costs from breaks $2.0M $9.7M $1.9M $0.2M
Total cost due to water
loss and breaks $24.6M $100.5M $6.5M $0.5M
CERIU paper - No Dig 2010, Chicago, IL
BLDG 6921
➢
Need to solve hydraulic & or
structural problem;
➢
Need to prolong life of water main;
➢
Presence of service connections;
➢
Pipe located in built up urban
environment or environmentally
sensitive area;
➢
Newly paved road;
➢
Require rapid trenchless installation;
➢
Need to minimize social costs;
➢
$ savings.
What are the Drivers for
Trenchless Renewal ?
BLDG 6921

8
➢
Save construction time;
➢
No need to displace utilities;
➢
No need to cut down mature trees;
➢
Preserve life of pavement;
➢
Continued access to homes,
businesses and traffic;
➢
Provide safe environment;
➢
Save $.
Motivating factors?
BLDG 6921
16
What We Are All Trying to Avoid
BLDG 6921

9
BLDG 6921
BLDG 6921

10
Liner Classification (AWWA M 28 Manual)
Class I Linings Non Structural CML, epoxy lining
Class II Linings* Interactive & Semi
Structural
Linings, sliplining,
modified sliplining
Class III Linings* Interactive & Semi
Structural
Linings, sliplining,
modified sliplining,
CIPP
Class IV Linings Fully Structural or
Structurally
Independent
CIPP, sliplining, HDD,
PB
* All loads transferred to host pipe
BLDG 6921 CC 2181
2. Water Main Rehabilitation
Technologies and Options
 Non Structural
◼
In Situ Spray on Lining
 Structural
◼
Cured-in-Place Pipe
◼
Sliplining (will not be presented)
◼
Sleeves (will not be presented)
 New Installations
◼
Pipe Bursting (will not be presented)
◼
HDD (will not be presented)
◼
Tunneling techniques (will not be presented)
 Stabilisation
▪ Passive and Cathodic (will not be presented)
BLDG 6921

11
Potable Water Systems:
• Distribution systems
• 150 – 300 mm dia
• Small diameter services
present
• CIPP - technology of choice
• Transmission systems
• > 350 mm dia
• No services
• Technologies available:
• CIPP
• Sliplining
• Pipe bursting
• HDD
BLDG 6921
Options
• Trenchless rehabilitation
• Structural CIPP;
• Proven technology.