Manholes are an important part of the city’s infrastructure, but they are often taken for granted. These are the vertical openings that are used to access the large underground systems that handle sewage, storm water, and utilities. Over time, manholes are exposed to water infiltration, hydrogen sulfide gas, soil movement and corrosive c…[Read more]

Manholes are an important part of the city’s infrastructure, but they are often taken for granted. These are the vertical openings that are used to access the large underground systems that handle sewage, storm water, and utilities. Over time, manholes are exposed to water infiltration, hydrogen sulfide gas, soil movement and corrosive c…[Read more]

Manholes are an important part of the city’s infrastructure, but they are often taken for granted. These are the vertical openings that are used to access the large underground systems that handle sewage, storm water, and utilities. Over time, manholes are exposed to water infiltration, hydrogen sulfide gas, soil movement and corrosive c…[Read more]