Caldwell has been building custom water tanks throughout North America since 1887. The company provides consultation regarding location, shape, size and tank type to fit the customer's and community's needs. Caldwell offers all types of elevated and ground storage field erected tank construction, including welded steel, prestressed concrete and steel bolted tanks. All tanks are constructed in compliance with the applicable AWWA and ACI standards. In addition to new tank design and construction, the company offers tank maintenance, inspection, repair and the TAP-APP mixing system. Caldwell Tanks