Port of Los Angeles: Berths 226-236 Terminal Improvement

AMC worked as a subcontractor to Manson Construction to handle all of the underwater scope of work for the wharf rehabilitation of Berths 226-236 in the Port of Los Angeles. We installed over 1,000 linear feet of octagonal and square concrete pile encasements utilizing the FX-70 fiberglass jacket system with marine-grade epoxy and underwater grout. This pile encasement work was a permanent solution to repair non-structural piles, structural piles, and broken piles that occurred over the life span of the wharf. AMC also repaired the slope underneath the Berth with underwater concrete pumping and bag placement to fill multiple voids. Lastly, our dive team completed the newly installed sheet pile wall by cutting it level at the desired underwater elevation and performing the underwater welding of the closure plate. Another successful project competed for the Port of LA!

La Jolla, CA: Cook’s Sea Cave Infill Project

Cook’s Sea Cave Infill Project, La Jolla CA

AMC responded to complete this emergency repair to Cook’s Sea Cave for the City of San Diego to ensure stability of the roadway and utilities above. Our scope of diving work included underwater welding, rock drilling, underwater pumping of erodible concrete, installation of 135 ballast blocks integrated with filter fabric to act as a breakwater, installation of steel bulkhead and welding of closure plate. AMC was proud to offer our diving services to help maintain such an environmentally pristine area so that it can continue to be enjoyed by the local San Diego residents and visiting tourists.


Cook Inlet Platform Subsea Pipeline Installation

Cook Inlet Platform Subsea Pipeline Installation

Commercial Diving in the Cook Inlet

4,1000 ft of the subsea oil pipeline was cut out and replaced with sectional spool pieces towed from shore.

American Marine Divers ensured each spool piece landed in a small target box next to an active gas pipeline. This requires precise movements, and Divers will have the know-how and experience working in the Cook Inlet environment.

Our divers utilized a metrology jig at each connection to fabricate the closure spools. These closure spools ranged from 20-50ft with various configurations to ensure the lines flanged together.

Divers cut both ends of the existing line utilizing a hydraulic Wach Saw and installed collet grips on each end. Creative solutions such as closure spools that went over existing lines on the seafloor were installed.

American Marine was proud to play the subsea experts in this technically challenging project.

Repair Seal Team Delivery Vehicle Boat Ramp and Finger Pier

Repair Seal Team Delivery Vehicle

Marine Construction Project in Hawaii

AMC is working on a Naval Facilities Engineering Command (NAVFAC) project in Pearl Harbor, Oahu, Hawaii. The project involves constructing a new boat ramp and finger pier to help meet the expanding needs of the U.S. Navy Seal teams stationed on Joint Base Pearl Harbor Hickam.

AMC will utilize a Watson hydraulic drill rig, its derrick barge AMC 160, and a D36 diesel hammer to pre-drill and drive new concrete piles to support a new boat ramp and finger pier.

After pile driving, the derrick barge AMC 160, in conjunction with AMC’s ADCI certified divers, will install underwater precast concrete pile caps, suspended slabs, and boat ramp panels.

Port Allen Maintenance Dredging

Port Allen Maintenance Dredging

Marine Construction Project in Hawaii

The U.S. Army Corps of Engineers contracted AMC to conduct maintenance dredging in Port Allen, Kauai, Hawaii.

AMC dredged approximately 482,000 cubic yards over 90 days. The crews were working in two 12 hour shifts, seven days a week which resulted in the project being complete well in advance of the projected schedule.

Our Team’s knowledge of the local environment played a critical role in the success of this project.

3. Port Allen Maintenance Dredging
Port Allen Maintenance Dredging

Ocean Cleanup Pacific Garbage Patch System Modifications 2018

Crane Barge wtih System on deck

Marine Construction Project in Hawaii

AMC towed a version of The Ocean Cleanup’s prototype from the Pacific Garbage patch to our office in Honolulu. AMC utilized its Tug and barge fleet to assist with making modifications and structural reinforcements for the system to better withstand the harsh environment of the Pacific Ocean.

The AMC team made a fast turnaround to ensure the system was deployed and operational with minimal downtime. Our team is extremely proud to have played a role in protecting our Oceans and making them a cleaner and better place for future generations. Mahalo!

Waikiki Sand Replenishment


Marine Construction Project in Hawaii

AMC is working as a sub-contractor to Kiewit Infrastructure West Co. to pump more than 20,000 CY of sand from offshore of Waikiki Beach to a dewatering basin where Kiewit then distributed the sand on Waikiki Beach.

AMC utilized a newly purchased Damen hydraulically driven dredge pump connected to an excavator with an AMC-designed jib.

Our team was able to beat production and finished another incident-free project.

The American Shore and Beach Preservation Association(ASBPA )honored AMC with a National Award for the Best Restored Beach for this project.

Pearl Harbor Sediment Remediation

telehandler forklift into the blower’s hopper

Marine Construction Project in Hawaii

AMC is placing activated carbon (AC) on the seafloor under numerous piers and in open water areas of Pearl Harbor to encapsulate contaminates. Before any work was completed, AMC needed to create a layout specifically for each area under the pier and open water area to ensure project requirements of 2” and 1” application thicknesses.

AMC uses a unique approach to disburse AC which utilizes a blower machine placed on the barge and loaded via telehandler forklift into the blower’s hopper (2,500 lbs of AC). Deck crew then distributes AC under the pier into the desired square footage.

In open water application, AMC devised a floating target box using HDPE piping and attached turbidity curtains to create a movable containment area while the crew applied the product. So far date the project has applied roughly 3.9 million pounds of AC onto the ocean floor.

equipment used on pearl-harbor-Sediment-remediation
telehandler forklift into the blower’s hopper