Caldwell Marine International, LLC. is a heavy marine construction contractor specializing in submarine utility operations. F ... or over 60 years, we have completed the installation and repair of hundred of submarine power and telecommunications cables worldwide. We’ve rehabilitated piers and docks, and installed many unique marine structures that required advanced installation techniques. With over 150 years of experience on staff, we have the expertise and equipment needed to take on any marine construction project. Caldwell Marine International is a JAG Companies Inc. company. Services and Tasks include but are not limited to: Submarine Utility Installations Submarine Cable Installations Heavy Civil Constriction Piers Docks Relieving Platforms Bulkheads - Cantilever, Tied-Back, Braced, & King Pile Piles and Pile Supported Marine Structures Cofferdams Tender Systems – simple to complex Dredging Pile Jacketing Commercial Diving Marine Concrete – Cast-In-Place Precast Concrete Structures Demolition and Removals Pipeline Installation read more