1. City of Greater Sudbury Lining Program Overview. Brittany Hallam, P
City of Greater Sudbury Lining Program Overview Brittany Hallam, P.Eng D&C Operations Engineer City of Greater Sudbury May 16, 2018

2. What is Structural Lining?
Cured-in-Place Pipe (CIPP)
Gravity and pressure pipe
Resin impregnated fabric
Cured by hot water or steam
Fully structural
Smoother surface
Minimum Design Life: 50 Years

3. Trenchless Rehabilitation - Benefits
Limit Traffic Disruptions:
As watermain lining only requires small pits, the City of Greater Sudbury along with many other municipalities requires all work to be done at night and the use of road plates over pits during the day. This allows busy roads to be opened to traffic throughout peak times without disruptions.

4. Trenchless Rehabilitation - Benefits
Hard to Reach Areas:
In many instances it may not be feasible to replace a watermain without a large cost or disturbance to sensitive environments. The City of Greater Sudbury has utilized pipe lining techniques to repair pipes under bridges, creeks, and railway tracks .

5. Trenchless Rehabilitation - Benefits
Cost and Time:

6. CGS Background
942 km of water mains and 778 km of sanitary sewer mains
Increasing age of infrastructure
Current average age: 48 yrs
Large infrastructure funding gap

7. CGS Watermain Lining Program
Test project
First 3 Year Contract
~$6 Million
Watermain Rehabilitation has evolved steadily in the City of Greater Sudbury. Just a few years ago this journey began by initiating a test lining project in order to evaluate the benefits of watermain lining. From there a small portion of the budget was allocated annually in order to implement both a sanitary and watermain lining program. Today, we have been approved to implement a 3 year contract for both sanitary and watermain lining worth a million dollars each, annually.

8. CGS Watermain Lining Program
Choosing locations for lining:
Break frequency
Operational concerns (ie. Discoloured water, low pressure)
Resurfacing projects
Access restrictions
In order to prioritize what locations are to be lined, CGS looks at multiple different criteria. A large portion of locations are based on a master list which prioritizes pipe segments based on length and break frequency. As well, continual communication with Operations staff alerts us to priority areas based on locations which break less frequently but are more difficult to locate and thus cost a lot more time and money or locations with chronic discolored water issues.
A key consideration is also locations that roads plans to resurface or reconstruct. A replacement is much less cost effective on a road that Roads is only planning on resurfacing where as a road reconstruction is the perfect opportunity to replace a main while minimizing cost to Water/wastewater. Lining ahead of roads resurfacing ensures we will not have to dig up a newly resurfaced road due to failing infrastructure below.

9. When to Line vs. Replace a Watermain
Adequate flow
No significant growth projections
Limited bends and fittings
Sanitary in good or linable condition
High traffic areas or inaccessible areas

10. Watermain Lining Access pits at hydrants, valves, fittings, and bends
175 meter runs on most mains
200 meter runs on 6’’ mains
4’’ to 24’’ diameter mains
Successfully completed projects to line 30’’, 36’’ and 48’’ mains
Line through 22 ½º and some 45º bends
~$900 to $1,000 per meter on 200mm
From 100mm to 400mm - ~$600 to $1,200 per meter for lining

11. Watermain Lining Steps: Temporary By-pass Access Pits
Perimeter Valve Installation
Pipe Cleaning
CCTV Inspection – pre lining
Liner Installation
Reinstatement of Services
CCTV Inspection – post lining
Disinfection
Reconnection & Restoration

12. CGS Sanitary Sewer Lining Program
2015 – First 3 Year Contract
2016 – 5.6 km Lined
2017 – 11 km Lined
Watermain Rehabilitation has evolved steadily in the City of Greater Sudbury. Just a few years ago this journey began by initiating a test lining project in order to evaluate the benefits of watermain lining. From there a small portion of the budget was allocated annually in order to implement both a sanitary and watermain lining program. Today, we have been approved to implement a 3 year contract for both sanitary and watermain lining worth a million dollars each, annually.

13. CGS Sanitary Sewer Lining Program
Choosing locations for lining:
Condition Assessment Program
I&I Studies
Watermain Projects
Operational Priority (ie. Multiple spot repairs)
Resurfacing Projects
Access Restrictions
In order to prioritize what locations are to be lined, CGS looks at multiple different criteria. A large portion of locations are based on a master list which prioritizes pipe segments based on length and break frequency. As well, continual communication with Operations staff alerts us to priority areas based on locations which break less frequently but are more difficult to locate and thus cost a lot more time and money or locations with chronic discolored water issues.
A key consideration is also locations that roads plans to resurface or reconstruct. A replacement is much less cost effective on a road that Roads is only planning on resurfacing where as a road reconstruction is the perfect opportunity to replace a main while minimizing cost to Water/wastewater. Lining ahead of roads resurfacing ensures we will not have to dig up a newly resurfaced road due to failing infrastructure below.

15. Sanitary Sewer Lining Manhole to Manhole No excavation
Cracks, fractures, holes, minor offsets
150mm to 500mm
~$170 per meter on 200mm
$115 per meter – 150mm
$130 per meter – 200mm
$240 per meter – 375mm
$500 per meter – 500mm
Lateral Reinstatement $180 per

16. Sanitary Sewer Lining Cautionary Tale:
Main collapse in the process of liner curing

17. Pros and Cons of a Multi Year Lining Contract
Early Project Start-up
Ability to Add Locations
Time Saved not Tendering
Building Relationship with Contractor
In order to prioritize what locations are to be lined, CGS looks at multiple different criteria. A large portion of locations are based on a master list which prioritizes pipe segments based on length and break frequency. As well, continual communication with Operations staff alerts us to priority areas based on locations which break less frequently but are more difficult to locate and thus cost a lot more time and money or locations with chronic discolored water issues.
A key consideration is also locations that roads plans to resurface or reconstruct. A replacement is much less cost effective on a road that Roads is only planning on resurfacing where as a road reconstruction is the perfect opportunity to replace a main while minimizing cost to Water/wastewater. Lining ahead of roads resurfacing ensures we will not have to dig up a newly resurfaced road due to failing infrastructure below.

18. Pros and Cons of a Multi Year Lining Contract
Difficulty with Contract Structure
Unforeseen Added Costs
Less Control Over Contract Schedule
In order to prioritize what locations are to be lined, CGS looks at multiple different criteria. A large portion of locations are based on a master list which prioritizes pipe segments based on length and break frequency. As well, continual communication with Operations staff alerts us to priority areas based on locations which break less frequently but are more difficult to locate and thus cost a lot more time and money or locations with chronic discolored water issues.
A key consideration is also locations that roads plans to resurface or reconstruct. A replacement is much less cost effective on a road that Roads is only planning on resurfacing where as a road reconstruction is the perfect opportunity to replace a main while minimizing cost to Water/wastewater. Lining ahead of roads resurfacing ensures we will not have to dig up a newly resurfaced road due to failing infrastructure below.

19. Overview
CGS lining programs are growing exponentially
Multi-year contracts are one of many tools to accelerate these programs
Familiarize yourself with the process before putting out a contract

20. Questions?