VPC’s relationship with the City of Wichita, KS began in 2017 with the installation of several of VPC’s Traffic Rated Hinged Lockable Fiberglass Manhole Covers. The following year, Wichita’s Stormwater Department contacted VPC to help develop a solution for two distinct sizes of Storm Drain Manhole Cover and frame sets currently used by the city for Catch Basins. City Operators were running into several challenges with the existing covers, including repeated theft of existing cast-iron storm drain covers. City operators found that the current lids were being stolen for scrap value which became a public safety issue; a missing cover becomes a severe hazard for pedestrians and drivers alike. In addition, the city recognized that cast-iron lids are extremely heavy and awkward to handle and can become a safety issue for operators cleaning and inspecting the structures.
While cast iron has been commonly used in manhole covers and frames due to its durability and high compressive strength, it’s still subject to corrosion and decay over time.
Why Corrosion is An Issue:
Weaken Traffic Load Ratings –