BNA Geothermal Cooling System

Garver and the Nashville International Airport teamed up to turn an abandoned rock quarry into an asset that helps lower energy costs by more than $600,000 per year. Garver designed a pipeline corridor that sends water in a closed loop from the quarry reservoir to a cooling plant at the airport’s terminal. The largest geothermal cooling system of its kind in North America turns 79-degree water into 63-degree water as it travels the two-mile high-density polyethylene pipe, which crosses a runway and taxiway en route to the reservoir.