For too long, cities have neglected manhole inspection. In the past, the need for flashlights and confined-space entry deterred many municipalities from investing in their manholes. Yet manhole inspections often reveal more sources of inflow and infiltration than other methods of sewer inspection, and improving them can be more cost-effective than repairing a pipe. Now, automated manhole scanning technology is making this inspection method a practical solution for combating I&I.
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