Showcase Projects
91st Avenue Waste Water Treatment Plant
Phoenix, AZ

This project entails the removal and replacement of all digester gas piping as well as the retrofit of an existing hot water loop and an existing boiler building, and the construction of a new boiler building.

University crews demolished the existing digester gas system, fabricated new 24-inch through 8-inch diameter stainless steel piping, and then re-piped 16 digesters at 91st Avenue. Completing this effort required an extremely intense effort, including two 24-hour shutdowns.

The 91st Avenue WWTP Support Systems Upgrade Team:
General contractor: McCarthy Building Companies
Engineer: Brown & Caldwell
University project manager: Dan Sackett
Piping superintendents: Larry Webb and John Diaz

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