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Tucson Community Center, Central Plant


The plant serves a municipal district energy system that includes not only the convention center but also an adjacent theater, music hall, police, and fire facilities. The rooftop cooling towers were failing, the chillers relied on phased out refrigerant, and the steam boilers were obsolete. We had to replace the core of the district energy production system without disrupting critical municipal operations or scheduled convention center events. The cooling towers were located in a difficult-to-reach spot over an in-board roof.


We developed a comprehensive, meticulous phasing plan that allowed for replacement of equipment while keeping heating, cooling, and electric power services online. This required close real-time collaboration among GLHN, the contractor, and City and plant operation staff.

Role: Engineer of Record
Cost: $7.1M