Asset Management of
Sewers Utilizing CCTV
Jack Graziosi, P. Eng., M. Eng.Director of Infrastructure Delivery, City of Vaughan
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About the City of Vaughan
• Located in the Regional Municipality of York
• We are a city experiencing extensive growth
• Current population - over 320,000
• 99 different languages spoken
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About the City of Vaughan
Home of TFC II
Subway Expansion in 2018 Vaughan Metropolitan Centre
Mackenzie Vaughan Hospital
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About the City of Vaughan
Public WorksDeputy City Manager
Corporate Asset Management
Manager
Environmental ServicesDirector
Fleet Management ServicesDirector
Infrastructure DeliveryDirector
Transportation Services, Parks & Forestry
OperationsDirector
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About the City of Vaughan
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Who are we?
• Citizens first through service excellence
• We are the Infrastructure Delivery Department
• Capital Planning
• Design and Construction
• Municipal Buildings and Linear Infrastructure
• Service Partners include :
• Vaughan Fire & Rescue Services
• Recreation Services
• Vaughan Public Libraries
• Environmental Services
• Transportation Services
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Service Excellence Strategic Initiatives
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What do we have?
• 860 km of sanitary sewer
• 1,075 km of storm sewer
• 13,000 sanitary maintenance Holes
• 13,000 storm maintenance Holes
• 20,000 catch basins
• 11 pumping stations
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Sanitary and Storm Sewers -
Capital & Operating Programs
• The City did not have a well defined, “proactive” capital
program for sewer rehabilitation/replacement
• Operation and maintenance of the sewer network is done
on a reactive basis only
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Condition Assessment Needs
• As the infrastructure ages , the maintenance and
rehabilitation needs increase.
• Establish a condition inspection program
• Develop a tool to aid in the analysis of condition
inspections
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Previous Business Process
• Reactive inspection approach
• Inspection undertaken when issue arises
• Data never stored for future use
• WRc Coding
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Objective:
To spatially represent the observations and defects of CCTV
inspections as GIS point layer
PACP codes to assign condition ratings to individual pipe segments
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Challenges
The need to produce CCTV inspection data output in
multiple formats that would satisfy the needs of all the
stakeholders:
Senior Managers
Operations Staff
Asset Management Specialists
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Challenges
LITTLE BUDGET!!
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Initial Plan
Link inspection record of each pipe segment within the
existing infrastructure database
Plotting defects identified as points along each pipe
segment
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Issues
Unexpected issues arose once the inspections
results were analyzed
Pipes can connect to structures other than manholes
Typographical errors and incorrect entries
Inspections performed from both upstream manhole
and downstream manhole
Abandoned inspections
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Issues
Data gaps in the City’s GIS Database
Pipe diameter, material and length not matching with
that of submitted CCTV data
Assets (manhole, pipe, catch basin etc.) not captured
in GIS
Assets digitized in the wrong location
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Technology Platform
ESRI ArcGIS 10.2.2
Oracle 11g Platform
Feature Manipulation Engine 2015
Microsoft Access
Microsoft Excel
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Solution
Data Verification Model
To identify non-matching pipe material, diameter and length;
invalid or non-existent manhole IDs; invalid connection; multiple
inspection instances
Data Load Model
Output 1 – CCTV inspection observation points including
defects in GIS format
Output 2 – Calculated Pipe Ratings assigned to each pipe
segment
Output 3 - Simplified Geospatial user interface and Excel table
for non-GIS users
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Methodology:
Upstream MH Downstream MH
Inspections Table
Conditions Table
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Solution
1. Data Process
Map
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Solution
2. CCTV Data Submission
• Data Standards
• Data Structure
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Solution
3. Data Verification
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Solution
3. Data Verification (cont’d)
• Pipe material
• Pipe Diameter
• Pipe length
• Maintenance Hole location/size
• Invalid connections
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Solution
4. Data Cleansing
• Revisiting As-build Drawings
• Field Verification
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Solution
5. Final Output
Run Error Free Data base through Data Load Model
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Results
• Effective tool to achieve the objectives of the CCTV
program
• Simple tool to illustrate the state of the existing sewer
network to Senior Management and Elected Officials
• Inform Operations Staff of urgent to short term
concerns
• Provide the necessary data to undertake the analysis
required for medium to long term asset planning
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Results
• Increased confidence in sewer network data
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Successes
• Tool was easily customizable
• Tool is versatile
• Met stakeholder expectations/needs
• Cost effective
• Can be used by any municipality
Questions?Contact Me:
Jack Graziosi
Director of Infrastructure Delivery
City of Vaughan