UTILIZATION OF ZOOM CAMERA TECHNOLOGY INMUNICIPAL SEWER SYSTEM MAINTENANCE
2008 Infra ConferenceQuebec City, QuebecNovember 17-19, 2008
UTILIZATION OF ZOOM CAMERA TECHNOLOGY INMUNICIPAL SEWER SYSTEM MAINTENANCE
2008 Infra ConferenceQuebec City, QuebecNovember 17-19, 2008
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CITY OF HAMILTONCITY OF HAMILTONCITY OF HAMILTON•• Is a Is a port cityport city on the western end of on the western end of Lake Lake
OntarioOntario..
•• population of 504,559population of 504,559
•• Part of the Part of the Golden HorseshoeGolden Horseshoe and the and the Quebec CityQuebec City--Windsor CorridorWindsor Corridor..
•• Traditionally, the local economy has Traditionally, the local economy has been led by the been led by the steelsteel and and heavy heavy manufacturingmanufacturing industries.industries.Within the last decade, thereWithin the last decade, therehas been a shift towards thehas been a shift towards theservice sector, particularlyservice sector, particularlyhealth sciences.health sciences.
Why Inspect?Why Inspect?
• Assess Condition – Structural and Service
• Schedule flushing and cleaning programs
• Exercise due diligence – Reduce risks
•• Assess Condition Assess Condition –– Structural and ServiceStructural and Service
•• Schedule flushing and cleaning programsSchedule flushing and cleaning programs
•• Exercise due diligence Exercise due diligence –– Reduce risksReduce risks
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How Often Should You How Often Should You Inspect?Inspect?
Every 5 YearsEvery 5 Years
More often in problem spotsMore often in problem spots
Customer ComplaintsCustomer Complaints
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To ZoomTo Zoom
oror
Not to Zoom?Not to Zoom?
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What is Zoom Camera What is Zoom Camera Technology?Technology?
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What is What is typicallytypically
foundfound
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Zoom Camera
Set up
Zoom Camera
Set up
Structural and Service Structural and Service Grades for PipesGrades for Pipes
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20042004
20082008
Longitudinal crack, infiltration Longitudinal crack, infiltration seeperseeper, ISCG 2, ISCG 2 Broken pipe ISCG 4Broken pipe ISCG 4
Encrustation PBG 4Encrustation PBG 4 Grease PBG 4Grease PBG 4 Heavy Roots PBG 4Heavy Roots PBG 4
I I -- Internal Structural Condition Grade (ISCG)Internal Structural Condition Grade (ISCG)
II II -- Potential for Blockage Grade (PBG)Potential for Blockage Grade (PBG)
Structural and Service Grades for Maintenance Holes
Structural and Service Grades for Maintenance Holes
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20082008
I - Condition Grade (CG)I - Condition Grade (CG)
II - Safety Grade (SG)II - Safety Grade (SG)
III – Potential for Blockage Grade (PBG)III – Potential for Blockage Grade (PBG)
PBG PBG -- Grade 4Grade 4
CG CG -- Grade 2Grade 2
SG SG -- Grade 5Grade 5
Critics ViewCritics View
• Zoom cameras are limited in their capability of inspecting the entire length of typical sewers
• Distance of defects from manhole cannot not be accurately determined
• Zoom cameras are limited in their capability of inspecting the entire length of typical sewers
• Distance of defects from manhole cannot not be accurately determined
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City of Hamilton’sAsset Management Report
City of Hamilton’sAsset Management Report
• Average zoom inspection distance of 30 meters (98 ft) from manhole
• On average 59.44% of defects are found within 20 meters (66 ft) of manholes and 76.12% are found within 30 meters (98 ft) of manholes.
• Average zoom inspection distance of 30 meters (98 ft) from manhole
• On average 59.44% of defects are found within 20 meters (66 ft) of manholes and 76.12% are found within 30 meters (98 ft) of manholes.
• 838 km / 521miles of inspection
• 59 % of defects within 20 m (66 feet) of MH
• 76 % of defects within 30 m (98 feet) of MH
• 838 km / 521miles of inspection
• 59 % of defects within 20 m (66 feet) of MH
• 76 % of defects within 30 m (98 feet) of MHZoomZoom
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In 1996 the City of Hamiltondeveloped a 5 year
maintenance program with the Zoom Camera
technology as its primary tool to identify it’s
maintenance needs
In 1996 the City of Hamiltondeveloped a 5 year
maintenance program with the Zoom Camera
technology as its primary tool to identify it’s
maintenance needs
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Aqua Cad Canalis SoftwareAqua Cad Canalis Software
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Table of ContentsTable of Contents
Aqua Zoom Inspection RegisterAqua Zoom Inspection Register
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Maintenance Hole Inspection RegisterMaintenance Hole Inspection Register
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Sewer Deficiencies ListSewer Deficiencies List
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Sewer Section RecommendationsSewer Section Recommendations
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Maintenance Holes DeficienciesMaintenance Holes Deficiencies
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Pipe DeficienciesPipe Deficiencies
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Pipe DeficienciesPipe Deficiencies
26,402 Manhole Inspections26,402 Manhole Inspections
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19961996
19991999
8889 In-line Camera Recommendations8889 In-line Camera Recommendations
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19961996
19991999
5179 Cleaning Recommendations5179 Cleaning Recommendations
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19961996
19991999
Manhole Priority RatingManhole Priority Rating
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19961996
19991999
Follow-up MaintenanceFollow-up Maintenance
Hydraulic Cleaning Tendered
Special Cleaning Tendered
CCTV assigned to Annual Contract
Emergency Repairs Quoted
Hydraulic Cleaning Tendered
Special Cleaning Tendered
CCTV assigned to Annual Contract
Emergency Repairs Quoted
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19961996
19991999
2001 Asset Management (AM) section established to manage and co-ordinate capital works for water/wastewater road and bridge infrastructures
The Zoom Camera Technology’s WRc defect coding for manholes and pipes provides AM an alternative tool for structural condition rating of the system where historic CCTV records did not exist.
The Zoom Camera program was therefore also turned to focus not only on the identification of O & M issues, but also on CPI management issues.
2001 Asset Management (AM) section established to manage and co-ordinate capital works for water/wastewater road and bridge infrastructures
The Zoom Camera Technology’s WRc defect coding for manholes and pipes provides AM an alternative tool for structural condition rating of the system where historic CCTV records did not exist.
The Zoom Camera program was therefore also turned to focus not only on the identification of O & M issues, but also on CPI management issues.
2nd Go Around2nd Go Around
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20042004
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Service RatingService Rating
WRc Coding Added to Deficiencies
WRc Coding Added to Deficiencies
Structural RatingStructural RatingStructural Rating
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Weekly Maintenance Report and
Recommendations
Weekly Maintenance Report and
Recommendations
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20042004
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Monthly Reports
Progress Payment QA/QC
Monthly Reports
Progress Payment QA/QC
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20042004
20092009
2000 $380,0002000 $380,0002000 $380,000
CCTV InvestigationsCCTV InvestigationsCCTV Investigations
15 $4,60415 $4,60415 $4,604
Main RepairsMain RepairsMain Repairs
Over Over 5000 5000 work work
orders orders initiated initiated to dateto date
2312 $655,0002312 $655,0002312 $655,000
Hydraulic Cleanings Hydraulic Cleanings Hydraulic Cleanings
260 $123,000260 $123,000260 $123,000
Special CleaningsSpecial CleaningsSpecial Cleanings
298 $168,927298 $168,927298 $168,927
Manhole RepairsManhole RepairsManhole Repairs
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20042004
20092009
Zoom Inspections to DateZoom Inspections to DateZoom Inspections to Date
29,500 Manholes – 4 years
76% of entire system
2,212 km (36,875 sections)
$2,150,000 Zoom
29,50029,500 Manholes Manholes –– 4 years4 years
76%76% of entire systemof entire system
2,212 km2,212 km (36,875 sections)(36,875 sections)
$2,150,000 $2,150,000 ZoomZoom
$ 1.50 per meter$ 1.50 per meter$ 1.50 per meter
$1,200,000 CCTV/Cleaning$1,200,000 $1,200,000 CCTV/CleaningCCTV/Cleaning
$3,350,000 $3,350,000 $3,350,000
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CCTV & Clean
2212 km
CCTV & CleanCCTV & Clean
2212 km2212 km
$2.69 per meter$2.69 per meter$2.69 per meter
$5,950,000$5,950,000$5,950,000
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The last few years Severe Rainfalls have increased in The last few years Severe Rainfalls have increased in numbers resulting in hydraulic overloading on the numbers resulting in hydraulic overloading on the
sewer systems and increased sewer backsewer systems and increased sewer back--ups.ups.
Property Owners were incensed and Politicians Property Owners were incensed and Politicians demanded answers as to why newer systems could not demanded answers as to why newer systems could not
handle the flow.handle the flow.
Zoom Inspections provided an audit of the system Zoom Inspections provided an audit of the system to ensure that there were no defects present to to ensure that there were no defects present to
contribute to the flooding much quicker than incontribute to the flooding much quicker than in--line line camera inspections could have.camera inspections could have.
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20042004
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QuestionsQuestionsQuestions