Burns & McDonnell was awarded the engineer-procure-construct (EPC) contract to replace four cooling tower motor power cables and repower the electrical system. We began by examining the site and developing a report for the client identifying the work that was needed for the plant. With our construction subsidiary, AZCO, we created a cost estimate and timeline for repair. AZCO’s scope included all electrical construction and fabrication.
The scope included demolition of an existing cooling tower stair foundation, removal of existing power cables, construction of a new cable tray support structure and associated foundation, installation of a new cable trench system with a 24-inch cable tray for the cooling tower motor feeds, and installation of four sets of three single conductor power cables with associated ground conductors and four process cooling tower fan motors. The project utilized over 5,000 feet of cable and 3.5 tons of steel.
The steel components of the cable support structure were fabricated at AZCO’s metal prefabrication shop. Once the steel was cut to meet specifications, the pieces were preassembled, shipped to a galvanizer and delivered to the plant.