The Greenfield WRF Plant serves the City of Mesa, Town of Gilbert and Town of Queen Creek. It’s capacity is almost 28 million gallons of sewage per day. It is an end of line plant (meaning it can never shutdown) as there is no place to put the sewage, if the plant where to become in-operable.
The Greenfield Solids Handling Facility project design intent, was to remove the old bus duct system originating at (2) 3125KVA Transformers, and (2) 1000KW Generators, and replace the bus duct, with 600V cable. Bus duct, though widely used in the industry, was not the correct application for this process facility. The Solids handling facility had experienced (3) extended outages, after large monsoon storms, had rolled though the Southeast Valley. The bus duct failed, due to rainwater getting into it, and causing a phase to phase fault, which blew a hole in the bus duct, in several areas. This became a major problem, as the Solids Facility Generators had to run for days, with the plant only being able to operate at a limited capacity.
Wilson Electric was brought in for our expertise, of not only installing the new cable feeder systems, but developing a procedure to demo and replace each system, during a series of outages, known as Maintenance of Plant Operations, or MOPO. It took months of development, and meetings with the Owner/Engineer, but at the end of the day, a procedure was developed and executed in a time frame of three weeks.
