Conquering Corrosion

Steel-reinforced polymer concrete manholes enable a Georgia utility to overcome the ravages of hydrogen sulfide
Conquering Corrosion
A composite manhole replaces a manhole approaching failure ina lightly used turn lane. (Photos courtesy of Gwinnett County Public Utilities)

A service call to unblock an 8-inch gravity main fed by a 6-inch force main packed a surprise for the Gwinnett County (Ga.) Public Utilities crew. When they popped the cover on the dump manhole, they found the four-year-old epoxy-coated concrete structure disintegrating.


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