Caldwell Tanks is a large privately held company that designs, fabricates, and builds tanks for the water, wastewater, grain, coal and energy industries. Caldwell is the largest elevated tank company in the world. Caldwell has approximately 500 total employees with 206 employees in Louisville at its 20-acre (81,000 m2) headquarters campus. Caldwell has two major facilities: fabrication facilities in Louisville, Kentucky, and Newnan, Georgia.