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

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

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.

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 .

Trenchless Rehabilitation - Benefits Cost and Time:

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

CGS Watermain Lining Program 2011 - Test project 2015 - First 3 Year Contract 2018 - ~$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.

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.

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

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

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

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.

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.

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

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

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.

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.

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

Questions?