Frequently Asked Questions

Submerged Construction LLC — commonly known as SubCon — is a union commercial diving and marine construction company headquartered in Newfield, New Jersey. We serve industrial, municipal, and government clients throughout the Mid-Atlantic and East Coast.

SubCon's leadership team brings more than 75 years of combined experience in inland commercial diving and marine construction. That depth of expertise is applied to every project we take on — from routine inspections to complex structural repairs.

Yes. Submerged Construction LLC is a union commercial diving and marine construction company. Our divers are union-certified commercial diving professionals, which is an important consideration for municipal, government, and prevailing wage projects.

SubCon is headquartered at 1682 Tuckahoe Road, Newfield, New Jersey 08344. We are centrally located within the Mid-Atlantic region, allowing efficient mobilization throughout New Jersey and the surrounding states.

SubCon's primary services include: underwater welding and burning, structural steel repairs, concrete pile encasements, marine construction (piers, docks, bulkheads, fender systems), underwater inspection, and salvage and recovery.

Yes. Underwater welding and burning is one of SubCon's core service areas. We perform wet welding and thermal cutting operations below the waterline on bridges, piers, dams, and a wide range of submerged steel structures. All welding operations are performed by union-certified commercial divers following documented procedures.

SubCon works on bridges (substructure elements, piers, piles, pile caps), dams (face walls, gates, stilling basins), marine piers and docks, bulkheads and retaining walls, fender systems, pipelines and outfall structures, water intake systems, and a wide range of other subaqueous infrastructure. Contact us to discuss your specific structure.

Yes. Concrete pile encasement is one of SubCon's primary services. We install composite encasement systems on timber, concrete, and steel piles to protect against marine corrosion, biological attack, and deterioration — restoring structural integrity and extending service life at a fraction of the cost of full pile replacement.

SubCon can mobilize for urgent diving situations. If you have a critical structural situation or emergency recovery need, call us directly at (856) 297-1418 to discuss your situation and our ability to respond.

Submerged Construction LLC is headquartered in Newfield, New Jersey, and serves clients throughout the Mid-Atlantic and East Coast — including New Jersey, Pennsylvania, Delaware, Maryland, New York, Virginia, and Connecticut. For projects outside these areas, contact us to discuss feasibility.

Yes. SubCon is experienced in both coastal marine environments (harbors, bays, tidal waterways) and inland waterway environments (rivers, reservoirs, lakes, inland industrial facilities). Our divers are trained for the range of conditions encountered in both environments.

SubCon mobilizes to project sites throughout our service area. Our New Jersey headquarters provides efficient access to the entire Mid-Atlantic region. Contact us with your project location and we will confirm our coverage and mobilization logistics.

SubCon's primary clients include industrial facilities (power plants, refineries, manufacturing, water treatment), municipal governments (cities, counties, authorities), and government agencies (state DOTs, federal agencies, port authorities). We understand the procurement and compliance requirements specific to each sector.

Yes. SubCon works both as a direct contractor (primary contractor for the owner) and as a specialty subcontractor to general contractors and construction managers on larger projects. We also work directly with engineering firms that require a commercial diving contractor to execute their inspection or repair scopes.

To prepare a quote, SubCon typically needs: the project location, structure type (bridge, dam, pier, etc.), a description of the work required (inspection, repair, construction), any existing drawings or inspection reports, the desired timeline, and your contact information. The more detail you can provide, the more accurate our initial estimate will be.

Yes. Every SubCon commercial diving operation is executed with a project-specific dive plan that covers safety protocols, equipment requirements, work methods, topside supervision procedures, and emergency response. This documentation is a standard requirement of professional commercial diving operations.

Upon project completion, SubCon provides documentation including dive logs, post-dive reports, and — for inspection projects — photo and video documentation formatted for engineering review. Specific deliverables are agreed upon during the project scoping process.

You can request a quote by calling us at (856) 297-1418, emailing info@subcondiving.com, or filling out the quote request form on our Contact page. We recommend including your project location, structure type, a brief description of the work, and your preferred timeline.

The fastest way to reach SubCon is by calling (856) 297-1418. You can also email us at info@subcondiving.com or use the contact form on this website. For urgent or emergency situations, always call directly.

Yes. SubCon is set up to work with clients who maintain approved contractor lists. Contact us at info@subcondiving.com or (856) 297-1418 to begin the prequalification process.