Ductile cast iron (cast iron with added magnesium) has been used for manhole covers and frames since the mid-20 th Century due to its durability and high compressive strength. Engineers who design ...

Suffice to say for now that it was one of two Dylan-themed manhole covers produced in an iron pour on Saturday in the lower parking lot of Peace United Church of Christ, 1111 N. 11th Ave. E.

A cast-iron manhole cover can weigh between 85 and 300 pounds and explosions in the past have propelled these discs into the air. Editor’s note: This article was updated at 12:39 p.m. May 16, ...

A manhole cover is generally deemed successful if its round shape keeps pedestrians from plummeting into the ... there’s a visual history of the metropolis in their cast-iron patterns, ...

In Kenmore, the city manages the stormwater system, including about 4,700 manhole covers it owns and another 2,600 it regulates. The sewer system is operated by a separate district.