Internal television is typically performed as a result of information collected during manhole inspections and smoke testing, customer complaints, excessive infiltration or in association with a preventative maintenance program. The purpose of this type of inspection is to determine:
• Structural condition
• Location of structural defects
• Identify size and material of construction
• Locate service laterals
• Locate obstructions and sources of infiltration
This system uses a comprehensive data collection and management software

Computer Video Inspection of Sewer Main
CCTV uses a television camera mounted
on a remote-controlled, self-propelled robotic device
that is connected to a video monitor, typically located
in our trailer. The robotic system is inserted in a
manhole and placed in the sewer for inspection. Once
inside the sewer, the remote control device moves
through the pipe. As it moves, an operator watching the
video monitor stops the camera at any type of defect or
pipe condition change to get a more detailed inspection.
The inspector
typically uses the camera’s 360-degree articulating lens
to get detailed information at all points of concern.
This information is electronically recorded on CDs or
DVDs; however, CDs and DVDs are more prominent because
of their ease of use.
An electronic footage counter is connected to the camera and enables the operator and engineers reviewing the data to know where the problems are located within the sewer.
The
City is now incorporating the video inspection system
with the use of (GIS)
Geographical Information System
I

Lowering Camera into Sewer Manhole