Caldwell Tanks has been designing and constructing steel and concrete storage tanks since 1887 — making it one of the longest-established tank fabrication contractors in North America. Headquartered in Louisville, Kentucky, and operating as part of Preload/Precon Holdings, Caldwell Tanks storage construction spans oil and gas terminals, municipal water infrastructure, industrial process vessels, and emerging low-carbon applications including hydrogen and biofuel storage.
Company Overview
Founded in 1887, Caldwell operates across energy, industrial, and municipal markets from its Louisville, Kentucky headquarters. Its integration into Preload/Precon Holdings extends the company’s capabilities into prestressed concrete tank systems — giving clients access to both steel and concrete storage technologies under a single contractor relationship.
The client base includes major energy operators such as ExxonMobil, Valero, and Kinder Morgan, alongside municipal utilities and industrial manufacturers. Caldwell maintains multiple fabrication and field offices across the United States and operates on projects throughout North America.
Tank Design and Fabrication Capabilities
Caldwell designs and constructs field-erected steel tanks to API 650 and AWWA D100 standards, covering crude oil, refined petroleum products, chemicals, and water storage. Through its Preload subsidiary, the company also delivers prestressed concrete tanks for high-capacity terminal, industrial, and utility applications — a technology with lower long-term maintenance requirements than equivalent steel systems.
Fabrication uses CNC precision cutting and welding for steel plate assembly, supported by 3D modelling, finite element analysis for structural and seismic design, and advanced coating systems engineered for corrosive environments. Digital construction management provides real-time QA/QC documentation across field projects. These capabilities are characteristic of the contractors reviewed in the Top 10 Tank and Terminal EPC Companies in North America.
Terminal Construction and EPC Services
Caldwell Tanks storage construction includes turnkey EPC delivery for oil and gas terminals, covering engineering, procurement, fabrication, and field erection of complete tank and terminal systems. Gulf Coast projects have included large API 650 crude oil and refined product tanks for storage terminals, while West Coast work has encompassed prestressed concrete containment for critical water and energy operations.
The company’s maintenance and rehabilitation division handles tank inspection, protective coating application, retrofits, and full refurbishment — extending asset life across refineries, distribution terminals, and municipal systems. For a broader view of how North American terminal infrastructure is evolving, see the Tank Terminals global guide.
Energy Transition Applications
Caldwell is active in storage applications supporting the shift toward lower-carbon energy, including renewable diesel and biofuel tank farms, hydrogen and ammonia storage systems, carbon capture containment, and battery energy storage support structures. Its established expertise in steel plate design and corrosion protection translates directly into the materials handling requirements for these emerging fuel types.
The LNG and cryogenic storage sector represents a further growth area, given Caldwell’s structural engineering capabilities in low-temperature applications — a segment analysed in OGSN’s coverage of the 2026 LNG storage infrastructure surge. Renewable diesel and sustainable aviation fuel terminals are also driving new fabrication demand as downstream operators expand product range.
Safety, Quality, and Standards
Caldwell operates to API 650, AWWA D100, ASME, and AWS standards across all project types, with in-house safety programmes that consistently exceed OSHA requirements. The company’s quality control teams oversee every fabrication and field construction stage, with a safety record described by leadership as among the best in the storage construction sector.
Bob Pierce, President and CEO, has cited integrity, craftsmanship, and over a century of engineering experience as the foundations of Caldwell’s client relationships — a consistency that supports repeat business across both private energy operators and public utilities.
Company Snapshot
| Headquarters | Louisville, Kentucky, USA |
|---|---|
| Founded | 1887 |
| Parent Group | Preload/Precon Holdings (privately held) |
| Sectors Served | Oil & gas, LNG, chemicals, water, renewables, municipal |
| Key Standards | API 650, AWWA D100, ASME, AWS, OSHA |
| Core Services | Steel and concrete tank design, EPC terminal construction, maintenance, coating |
| Notable Clients | ExxonMobil, Valero, Kinder Morgan, municipal utilities |
| Geographic Reach | USA, North America |
| Website | caldwelltanks.com |
What does Caldwell Tanks specialise in?
Caldwell Tanks specialises in the design and construction of field-erected steel and prestressed concrete storage tanks for oil and gas terminals, industrial facilities, and municipal water infrastructure. Founded in 1887, the company delivers full EPC services from engineering and fabrication through to field construction, coating, and maintenance.
Where is Caldwell Tanks headquartered and where does it operate?
Caldwell Tanks is headquartered in Louisville, Kentucky, and maintains multiple fabrication and field offices across the United States. The company operates primarily across North America, with projects spanning Gulf Coast energy terminals, Midwest industrial facilities, and West Coast water infrastructure.
What tank construction standards does Caldwell Tanks build to?
Caldwell designs and constructs tanks to API 650 for welded steel oil storage, AWWA D100 for water tanks, and ASME standards for pressure vessels. The company also holds AWS welding certifications and operates safety programmes that meet or exceed OSHA requirements across all field operations.
Who owns Caldwell Tanks?
Caldwell Tanks operates as part of Preload/Precon Holdings, a privately held infrastructure group. This ownership structure gives Caldwell access to prestressed concrete tank technology through the Preload and Precon subsidiaries, expanding its capabilities beyond steel fabrication into long-life concrete containment systems.
Is Caldwell Tanks involved in renewable energy and LNG storage projects?
Yes. Caldwell is active in renewable diesel, biofuel, hydrogen, and ammonia storage construction, as well as carbon capture containment projects. The company’s structural engineering capabilities in low-temperature and cryogenic design also position it for LNG-related storage work as North American LNG infrastructure expands.