CCTV inspection Articles

  • Comparison of the inspector and rating protocol uncertainty influence in the condition rating of sewers

    Wastewater drainage systems asset management decisions, in particular regarding rehabilitation interventions, are largely dependent on close-circuit television (CCTV) inspection results. However, the results of CCTV inspections are affected by several sources of uncertainty. Within the present communication, the inspector's uncertainty is quantified by comparing periodic inspection ...


    By IWA Publishing

  • City of Montebello Sewer Master Planning Utilizing Innovative GIS Solutions

    City of Montebello wanted to implement a comprehensive sewer master plan. At the same time they wanted to embark on implementing a GIS program. The solution was to combine the two and utilize the power and versatility of GIS as the core technology for performing the sewer master plan. In this paper we will show how the City accomplished its primary objectives which included: Modernizing its ...

  • Rapid detection of sewer defects and blockages using acoustic-based instrumentation

    Sewer flooding incidents in the UK are being increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers need to be able to identify the location of blockages promptly. Traditional closed-circuit ...


    By IWA Publishing

  • The role of robotics in the trenchless industry

    The official definition of a robot is “a machine or device that operates automatically or by remote control,” yet this does not really define the information and functions that the robots in the Trenchless Technology industry provide to engineers from local water authorities, municipalities and It can be argued that the first step towards what we know today as ‘robots’ was the use of tube ...


    By KATE PMO AG

  • Case study - Maynilad Water Services - Manila, Philippines

    Service: Sahara - Leak Detection and Video Client: Maynilad Water Services, Inc. Project Date: Ongoing since 2010 Location: Manila, Philippines Type of Pipelines: Water Mains Diameter: 12-inch to 24-inch (300mm to 2200mm) Pipe Material: Cast Iron Ductile Iron Steel Length: 50 miles (80 km) Results: Over 157 leaks Pure Technologies, under a past contract through wholly owned subsidiary ...

  • Applications of Pipe Penetrating Radar for Advanced Pipe Condition Assessments: the Clark Regional Wastewater District (WA) Case Study

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter non-metallic (reinforced concrete, vitrified clay, PVC, HDPE, etc.) underground pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids outside the ...


    By SewerVUE

  • Case study - Grand Forks wastewater authority - North Dakota, U.S.A.

    Service: SmartBall - Leak & Gas Pocket Detection Client: Grand Forks Wastewater Authority Project Date: 2008 Type of Pipeline: Force Main Diameter: 30- and 36-inch Pipe Material: PCCP and PVC Length: 46,464 Feet Pressure: Results: 6 Gas Pockets In late October 2008, the Grand Forks Wastewater Authority (Authority) located in Grand Forks; North Dakota initiated a project to ...

  • Multi-sensor inspection robot shows benefits of pipe penetrating radar - Case Study

    Pipe penetrating radar (PPR), the in-pipe application of ground penetrating radar (GPR) is one of the most promising quantitative pipe condition assessment technologies to emerge in recent years. With most of the underground pipe infrastructure reaching the end of their design life there is a need to provide measurable data in order to establish the extent of rehabilitation required or the timing ...


    By SewerVUE

  • Trouble Shooting for Trenchless Liner Installation During Sewer Line Rehabilitation

    ABSTRACTLining is being used by the utility industry as a cost effective solution to rehabilitate utility lines. Many types of liners, such as, cured-in-place-pipe (CIPP), fold and form PVC, deformed & reformed HDPE, etc., are being used to restore structural integrity of deteriorated pipes and to reduce inflow/infiltration. Most of the lining installation is carried out without any problem, ...

  • Tech Spotlight: DT340 Pipe Crawler Freewheel (AFW) by Deep Trekker

    A deeper look into pipe crawler freewheel and the best ways to retrieve CCTV pipe inspection crawlers from municipal pipes. Pipe inspections require tough systems that can withstand the grueling environments of municipal infrastructure. As the departments and contractors tasked with servicing these pipelines, it is extremely important to select a tool that stands up to the challenge. Today we ...


    By Deep Trekker Inc.

  • Vancouver, WA Salmon Creek, St. Johns Trunk - Case Study

    Summary Clark Regional Wastewater District commissioned a condition assessment on the Salmon Creek and St Johns Trunk reinforced concrete lines. For St. Johns Trunk, a 36-inch line, corrosion due to vapor-phase H2S was suspected and evidence was observed visually by CCTV. The District wanted to quantitatively determine the extent of corrosion and if/when future rehabilitation would be needed. ...


    By SewerVUE

  • Pipeline Zooming for a Comprehensive Infrastructure Survey.

    Time, budget and resources often keep a municipality from maintaining comprehensive, up-to-date information on water and sewer pipeline conditions. Without a complete understanding of their infrastructures, municipal supervisors cannot properly prioritize and schedule maintenance activities. As a result, emergencies—backups, collapses, and overflows—happen unexpectedly, and must be dealt with on ...


    By Envirosight LLC

  • Process to Estimate Sanitary Sewer Pipe Remaining Life Provides MWWSSB Remedial Decision Information

    ABSTRACTA condition assessment study for the Water Works and Sanitary Sewer Board of the City of Montgomery’s (MWWSSB’s) West Catoma Interceptor (WCI) was conducted in 1998 and 2003. The WCI was evaluated in 1998 using core sampling, closed-circuit television, and manhole (MH) inspections. Approximately 193 MHs and 65,000 linear feet (LF) of pipe were inspected. A subsequent study conducted in ...

  • Leaders in the Field of Trenchless Pipeline Rehabilitation

    What is Trenchless Pipeline Rehabilitation? It is a form of sub-surface construction work that requires few trenches or no continuous trenches. It can be defined as “a family of methods, materials, and equipment capable of being used for the installation of new or replacement or rehabilitation of existing underground infrastructure with minimal disruption to surface traffic, business, and ...


    By Shenzhen Senzor Tek Co.,Ltd

  • Case study - City of Rockville - Robotic Pipeline Inspection

    Service: PureRobotics - Robotic Pipeline Inspection Client: City of Rockville Project Date: July 2010 Type of Pipeline: Water Transmission Main Diameter: 24-inch Pipe Material: PCCP Length: 53,000 feet Results: 3 pipe sections identified at risk Insertion of Pipeline Inspection Robot Pure Technologies (Pure) was contracted to provide robotic pipeline inspection of a critical 24-inch prestressed ...

  • Denver Colorado - Harvard Gultch Interceptor - Case Study

    Summary Pipe penetrating radar (PPR), a new pipe inspection technology was used for condition assessment in a 27 inch interceptor in Denver, CO. Metro Wastewater Reclamation District (MWRD), the owner of the interceptor had limited information about the condition of the pipe, so they contacted SewerVUE in order to undertake a multisensory pipe condition assessment that included CCTV, PPR and ...


    By SewerVUE

  • Comparison of core sampling and visual inspection for assessment of concrete sewer pipe condition

    Sewer systems are costly to construct and even more costly to replace, requiring proper asset management. Sewer asset management relies to a large extent on available information. In sewer systems where pipe corrosion is the dominant failure mechanism, visual inspection by closed circuit television (CCTV) and core sampling are among the methods mostly applied to assess sewer pipe condition. ...


    By IWA Publishing

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