Logan Diving & Salvage inspects a wide variety of marine structures, including marine towers, bridges, tanker docks, offshore platforms, piers, port bulkheads, navigation towers, and wharfs. We include a comprehensive written report and new ACAD drawings in plan and profile to our client’s specifications. We provide 4 Levels of Inspection intensity based on our clients’ needs, goals and objectives.
Logan Diving & Salvage Substructure Inspection Approach:
Level I Survey is performed to identify indications of obvious overloading, design deficiencies and any use which is inconsistent with the platforms/structures original purpose. Level I Survey includes a general examination of accessible structural members in the splash zone, and above water, documenting existing obvious defects and deficiencies.
Level II Survey consists of general underwater visual inspection by divers to document the following: excessive corrosion, structural member fatigue damage, percent wasted to structural members, Cathodic Protection system condition, coating condition, accidental or environmental overloading, scour/seafloor instability, etc.
Level III Survey consists of an underwater visual inspection of preselected areas and/or based on results of the Level II Survey, areas of known or suspected damage. Such areas should be sufficiently cleaned of marine growth to permit thorough inspection. Pre-selection of areas to be surveyed should be based on an engineering evaluation of areas particularly susceptible to structural damage. Detection of structural damage during a Level III Survey should be the basis for a Level IV Survey.
A Level IV Survey consists of underwater ultrasonic nondestructive testing (steel structure’s) coring/soundings (timber structures) of preselected areas and/or, based on results of the Level III Survey, areas of known or suspected damage. Level IV Survey also includes detailed inspection and measurement of damaged areas as well as underwater digital still / video documentation.
Original substructures often are not capable of handling new equipment and increased loads. Our engineers have a proven track record of solving these kinds of challenges. Substructure modifications can usually be initiated and completed without disruption to the current ongoing operation.
Logan Diving & Salvage’s divers have been involved in traditional harbor work for more than 70 years.
Providing quality inspection of dock and pier substructures requires a comprehensive knowledge of the individual components and sequence of construction. Having been involved in the construction of heavy industrial bridges, piers and docks over the years has given Logan Diving & Salvage the experience to provide quality inspection services that count.
Commercial divers from Logan Diving & Salvage have the experience gained through actual construction projects to accurately inspect and document findings of your substructures.
Inspections typically consist of the following:
Excessive corrosion • Accidental or environmental overloading • Scour, sea bed instability • Structural fatigue • Construction deficiencies • Concrete spalls • Debris • Excessive marine growth • Pile type and existing condition • Substructure to superstructure interface • Cap beam type and condition • Bracing baffle
View projects that we have recently completed for clients needing underwater substructure inspection services.
Divers and equipment were requested to perform a comprehensive substructure inspection of all marine structures, piling, caps, beams, cathodic protection, and tanker dock ancillary appurtenances…Learn More
Logan Diving & Salvage was requested to provide engineering, design, project management, dive teams, underwater burners, structural repair member fabrication…Learn More