Manhole Inspections

Manhole inspections are known to be a relatively inexpensive and quick method of detecting inflow/infiltration sources in storm and sanitary sewer systems. Visual manhole inspections provide an additional source of information concerning the presence and degree of inflow/infiltration problems, the general structural condition of the manhole and the accuracy of previous system drawings.

Visual manhole inspections can be used to determine the following:

• The exact location of the manhole
• The condition of cover and frame (including defects that would allow inflow to enter the sanitary sewer system),
• Whether the cover is subject to ponding or surface run off,
• The potential area that drains to any defects,
• The condition of benching, risers, grade rings and collar, and
• The condition of sewer pipe and lateral connections.

Hydro-Com Technologies Limited has over 50 years of combined experience in performing manhole inspections. Once the manhole inspection program has been implemented and the manholes have been visually inspected for hydraulic and structural integrity, a detailed rehabilitation program can be developed that will allow operators/engineers to implement a cost effective maintenance plan over one or many years.