Underwater Resources Inc
Pier 26, The Embarcadero , San Francisco,, California, United States

Celebrating over a quarter century in business, Underwater Resources, Inc. (URI) is a licensed, insured and bonded commercial diving and marine contractor specializing in:

• Underwater construction and repairs;
• Sub-sea structural and condition surveys;
• Rehabilitation of docks, piers, submerged pipelines, bridges, sanitary outfalls, levees, gate structures, canals, dams and wharves;
• HDPE Pipeline construction for marine applications;
• Fabrication and installation of floating security barrier systems;
• USCG, US NAVY and ABS classification vessel inspections.

URI offers state-of-the-art equipment and facilities in order to deliver premier, customer-driven solutions. Our highly skilled diving, technical and project management team are experienced in deep water, coastal and inland waterway environments. We operate and maintain our own remotely operated vehicles (ROVs), sonar imaging and profiling systems, dredging and hydraulic powered equipment, and a variety of other specialized systems for underwater use.

For over 30 years URI has worked on projects from coast to coast within the continental United States as well as Alaska, Canada, Mexico, Guam, Saipan and South Korea.

Diving Services

URI diving personnel are particularly qualified and experienced working in “black water”, turbid water and high tidal current conditions normally present here in the SF Bay. Our work experience includes:

Inspection, repairs and new construction of sanitary ocean outfalls, water transmission & gas/oil pipelines and large diameter tunnels and canalsDiving Services
Conduct internal pipeline and tunnel diver penetrations in excess of 3000’ to perform structural inspections and repairs.
Detailed structural condition surveys and repairs of waterfront facilities including wood, steel and concrete rehabilitation of piling and substructure members; corrosion monitoring and installation of cathodic protection systems; concrete and weld repairs.
Dam inspection, repair and retrofit; demolition and replacement of sluice gate operating systems; leak repair and concrete restoration on dam faces, spillways and penstocks.
ABS certified “External Specialists” to conduct ship surveys including UWILD and NDT inspections (ultrasonic gauging and magnetic particle) and hull repairs.
Sediment removal, inspection and both coating/structural repairs of potable water reservoirs and appurtenances conforming to AWWA disinfection requirements.
Diving ServicesOffshore/Coastal Diving for surveys and repairs of ocean outfalls, direction drilling and fiber optic cable installation support and salvage & recovery of materials/structures.
Oil refinery, sanitary and other process plant facility repairs in aeration/bio-reactor ponds, clarifiers and digesters, force mains and traveling intake screens; installation of portable dewatering cofferdam systems (Portadam®).
Sediment removal/displacement operations required for salvage, pipeline/cable burial and piling and pier repair.
Utilization of assorted UW hydraulic/pneumatic power tools and various burning, cutting and welding equipment systems.
Performance of projects requiring high-altitude diving as well as deep air and mixed gas diving operations in excess of 250’.

Inspection Services

Construction inspection monitoring, geophysical surveys and both destructive and nondestructive testing of materials require specialized training of personnel, selection and application of sophisticated equipment, and the utilization of certified technicians and inspection divers. Inspection services we provide include:Inspection Services

Stand-alone sonar imaging & profiling surveys of sanitary outfall pipeline diffuser ports and at locations with restricted access.
Submerged & buried pipeline and cable tracking and locating utilizing Radio detection (utility locator), marine magnetometer, sub bottom profile/bubble pulse and DGPS tracking and navigation systems.
Sidescan sonar and bathymetric bottom profile and contour surveys for locating objects, identifying/documenting bottom features and search and recovery in lakes & rivers, estuaries and bays, coastal and offshore locations.
Structural condition surveys using nondestructive testing (NDT) of above and UW metal, concrete and wooden structures with low-light/high resolution video documentation, ultrasonic (UT) thickness gauging and shear-wave examination, magnetic particle inspection (MT) and other acoustic sensing and ultraviolet lighting techniques.
Coring, boring/probing, oxy-arc cutting and destructive testing of concrete, steel and wooden materials collected by divers for laboratory analysis including chloride intrusion, compression and tensile strength/limits.
Current velocity and multibeam sonar bottom surveys, utilize Total Station survey instruments for "as-built" documentation of marine dock substructure piling, integration of ultra short baseline positioning with DGPS survey systems to create 3D mapping.
Deployment and recovery of oceanographic instruments with data loggers to record current and pressure, water quality, temperature and other sample data from culverts, outfalls, submerged structures and at open seabed locations.
Third party construction inspection during critical component stages requiring QC/QA of Owner’s contracted work for extensive or complex underwater repairs, new pipeline construction, field monitoring of marine construction materials, etc.

ROV/SONAR INSPECTIONS

Having owned and operated multiple “inspection class” remotely operated vehicle systems since 1984, we have the technical expertise to integrate sonar, navigational and other sensing instruments with our ROV systems in order to perform a variety of specialized and detailed remote underwater surveys. Our experience includes conducting comprehensive inspections within flooded shafts, on dams, in penstocks and tunnels, pipelines, on dams, in open channels with severe tidal currents under stationary, towed and “live boating” modes.

Remote video inspections to 1000' deep and up to 4000' of penetration within flooded pipelines, concrete lined & rock tunnels and shafts; slant range positioning.Inspection Services
Sonar profiling to monitor and document scour, dredging, sediment accumulation in basins, canals, along levees, beneath piers and bridges; USBL navigation/positioning.
Sonar imaging to locate submerged structures for recovery and obstacle avoidance under turbid water conditions; condition surveys of concrete lined and unlined canals, piers and abutments, and across dam faces.
Both towed and “live boat” ROV/Sonar profiling for submarine pipeline condition and bedding/armor rock protection surveys on oil and gas pipelines, water transmission & sanitary outfall pipelines, fiber-optic communication & power transmission cables.
Marine oceanographic and biological studies for remote deployment and recovery of instruments, marine animal behavior & marine/aquatic seabed plant distribution research.
Use of small, portable ROV inspection systems for low cost and easy deployment in tanks, reservoirs and lakes with larger systems powerful enough to work in ocean currents and deeper water inspections specified for complex tasks and larger payloads.
Still photograph documentation, laser imaging/sizing and development of specialized tooling for small & limited function manipulators, ultrasonic thickness gauging (UT) and water quality testing & monitoring.