Diving and Marine

            Construction

 

 

 

 

Sea Engineering has been a licensed general contractor in Hawai`i since 1986.  The construction division of the company specializes in marine and underwater construction and concrete rehabilitation, and provides subcontractor diving services to general contractors for underwater work on large projects.  SEI has completed projects in Hawai`i, California, Alaska and Japan.  

 

 

Concrete Repair and Restoration

  • Structural repairs using two-part epoxy injection techniques and localized quick-setting concrete patch repair.

  • Repair of broken and leaking concrete canal lining by installation and pumping of large mattresses to seal and cover damage.

  • Repair of voids, cracks and spalls in concrete, subsidence, mechanical damage, failed concrete and structural rebar corrosion on sea walls, bulkheads and other submarine structures

  • Concrete encapsulation of piles under piers, wharves, and bridges using tubular steel or nylon bag forms.

 

 

 

 

 

Submarine Cable and Pipelines

  • Installation and pressure testing of flexible fuel hose for offshore tanker depot

  • Removal of sedimentation buildup, sand deposits and other blockages using hand dredging, pneumatic/hydro blasters using divers

  • Submarine fuel pipeline ultrasonic inspections

  • Installation and repair of submarine cables, HDPE, welded steel, and ductile iron pipelines in lakes, bays and exposed coastal environments

  • Anchoring of new and existing pipelines to sea bed, placement grout bags for armor protection and ballast

  • Installation of mid-water supports for long HDPE pipe spans on 48” pipe.

  • Pipeline cleaning using high-pressure “Pigging” techniques.

 

 

 

 

 

Structural Repair and Demolition

  • Dry-dock structure rehabilitation including slide gate, track and seal, manual operator and support guide repair/replacement

  • Repairs, modification to and replacement of trash-rack and debris screen structures

  • Temporary and permanent plugging of abandoned pipelines, tunnels and manhole structures.

  • Repair and maintenance of mechanical supports on pipelines, outfalls and intake/discharge lines.

  • Repair of mechanical structures in industrial and sanitary treatment plant process tanks, basins, ponds, vaults and pipelines.

  • Repair and modifications to diffuser ports, aeration systems, and discharge pipelines.

  • Design, repair and construction of boat ramps, floating docks and walkways, water access platforms and steps

  • Maintenance and repairs to the underbody of ships including anode installation, propeller replacement and shaft seal repairs, removal of biofouling prior to dry-docking, cofferdam and plug installation for overboard discharge and intake valve service and replacement

  • Installation of anti-scour mat around exposed or unsupported pipeline spans for protection of bridge piers, footings, and other submarine structures

  • Scour and erosion control of bridge piers and sea walls with anchored submarine placement of concrete-filled mattresses.

 

 

 

 

 

Underwater Welding and Cutting

  • Structural repairs to sheet piles barriers and bonding strap reinforcement repairs

  • Maintenance and repairs to ships including repair of side and bottom shell damage, sacrificial anode installation, installation/removal of rope guards and cable removal from propeller and shaft

  • Underwater wet-weld repairs to screens and gates, sacrificial anode installations and continuity welds for impressed current protection for pipelines

  • Demolition and removal of steel rail track and structural steel debris

  • Steel sheet and support pile oxy-arc cutting and removal

  • Heavy equipment salvage, heavy lift rigging and water transport.

  • Concrete demolition and removal using impact hammers and breakers, core drilling, roto-impact and rock drilling, hydraulic concrete splitters, diamond wire and circular saw cutting, and underwater explosives.

  • Demolition and removal of large concrete piers and columns, wharf and dock pilings, sea walls and abandoned pipelines, penstock, tunnel, and manhole concrete plugs

 

 

 

 

Dredging, Debris Removal & Excavation

  • Airlifting and water-lift eductors for removal of mud, clay and sandy bottoms to expose pipelines, cables, and structures

  • High pressure water blasting for epoxy coating removal, biofouling and corrosion or scale removal

  • Structural/substrate preparation of weak or damaged concrete for encasement and sealing repair

  • Burial or exposure of pipeline and cable for protection or exposure to perform repairs

  • Debris removal for retrofit and repair to bridge piers, footings and foundations

  • Floating debris and sediment booms for containment purposes on marine construction projects, run-off control and emergency spills.

 

 

 

 

 

 

Typical Projects

 

Barber’s Point Single Point Mooring Overhaul (Ongoing)

Sea Engineering, Inc., as subcontractor to Smith Maritime, provides all diving services to Tesoro Hawaii during their Single Point Mooring overhauls and maintenance.  Work includes hose change-outs and inspection of two PLEMs and three oil pipelines in 105 feet of water off Barber’s Point, O`ahu.

Client:  Smith Maritime

 

 

Wahiawa Wastewater Treatment Plant Reservoir Outfall (Ongoing)

Sea Engineering, Inc. is responsible for the design and construction of a new 24-inch wastewater outfall which will discharge into the largest freshwater reservoir in Hawai`i.  The new design will take site constraints, including difficult mobilization considerations, into account.  Sea Engineering will then have the task of constructing the new outfall.

Client: Healy Tibbitts Builders, Inc.

 

 

Repair Stoplog Slots, Dry-docks No. 2 and 3, Pearl Harbor Naval Shipyard Pearl Harbor, Hawai`i (1997)

Sea Engineering installed four new stoplog doors and stainless steel door frames in two of the dry-docks at Pearl Harbor Naval Shipyard.  Installation involved mounting 1/2 to 2 ton door frames in existing openings in the concrete dry-dock faces.  Work involved water blasting, demolition, drilling and welding in water depths to 70 feet.  All diving was done in accordance with the U.S. Army Corps of Engineers safety standards EM 3985-1-1.  Sea Engineering, Inc. was selected as ROICC Pearl Harbor Construction Office outstanding contractor for the first half of FY 1998 for superior performance on this contract.

Client:  Department of the Navy Pacific Division, Naval Facilities Engineering Command, Pearl Harbor, Hawai`i  96860-7306

 

 

Ke`ehi Lagoon Hazardous Waste Search and Recovery, O`ahu, Hawai`i (1994)

SEI, as subconsultant to CET Environmental Services, Inc. of Seattle was responsible for the search and recovery of toxic containers dumped into Ke`ehi Lagoon, in a criminal pollution case that was called one of the state's worst environmental emergencies.  SEI located the containers for the state after five other companies were unable to do so.  This led to the EPA-funded operation to locate and recover all the containers, and to an FBI investigation to find the responsible parties. In response to the EPA, Sea Engineering, Inc. mobilized rapidly to minimize potential contamination to the marine environment and to assist in the FBI case.  SEI utilized differential GPS, a high resolution sub-bottom profiler, a digital side scan sonar, and an ROV mounted with scanning sonar and real-time vessel tracking to locate and record the positions of the containers.  SEI then recovered the containers using in-house divers and boat operators licensed in hazardous waste operations.

Client:  U.S. Environmental Protection Agency

 

 

 

 

Recently completed or ongoing construction projects include:

  • Repairs to Piers K-7 & K-8, and V-2 and V-3, Pearl Harbor, Hawai`i

  • Repairs to Pier 51, Honolulu Harbor

  • Ford Island Bridge (Diving Services)

  • Fueling Pier H. Pearl Harbor

  • Berthing Pier, Sub Base, Pearl Harbor

  • Wailoa Boat Harbor Launch Ramp Replacement

  • Concrete Rehabilitation at Kahe Power Plant

  • Fender Repairs to Piers 10 & 11, Honolulu Harbor

  • Ke`ehi Boat Harbor Pier 400 Replacement

  • Replacement of 6” Waterline at Piers 1 & 2, Honolulu Harbor, Hawai`i

  • Construction of the Kaimala Marine in Hawai`i Kai

  • Consolidated Multiple Pier side Projects, Pearl Harbor (Concrete Rehabilitation)

  • Commercial Fishing Village, Piers 36-38, Honolulu Harbor (All new concrete work)

 

 

Clients include:

U.S. Navy

CalTrans

City of St. George, Alaska

State of Hawai`i

U.S. Army Corps of Engineers

Hawaiian Electric Company

Tesoro Hawaii

City and County of Honolulu

U.S. Coast Guard

Healy Tibbitts Builders, Inc.

Morrison-Knudsen

Manson Construction

Kiewit Pacific

Goodfellow Brothers

General Construction

Hawaiian Dredging Construction Company

 

 

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