Sanitary sewer manholes provide access to the collection system for maintenance and repair. Sanitary sewer manholes within each sewershed will be opened and recorded as concrete or brick. Brick manholes are of the greater I&I concern because they are typically older, and deteriorated mortar can be a significant source of infiltration. Many of the brick manholes in the City are approaching 100 years old.
After the brick manhole locations are recorded, their condition is ranked to determine an improvement or replacement priority. Brick manholes with a poor or very poor rating are typically repaired first while the remaining brick manholes are addressed in subsequent years based on age (i.e. the older manholes will be replaced first) and priority rankings in the other sewersheds.