Marine Construction:

Seaforce teams have been involved in a number of construction tasks over the years, some of our most recent projects involved a pipeline construction for a new power station. This task required Seaforce diver to position 2.4m diameter, 6 tonne pipe sections in zero visibility. The 320m pipeline was laid in 30m sections fully coffer dammed to reduce environmental impact during excavation and filling. This is one of many pipeline installations Seaforce has been involved with.

Seaforce is also the diving contractor for Verve Energy. We complete all diving maintenance and inspections within the power station. Most recently completing a water intake canal tie in. this involved placement of coffer dams, underwater construction, drilling, Broco cutting and wet welding. We also service and maintain the offshore intakes and beacons for Verve as well as offshore marine structures for other clients. One of our clients was saved approximately $750,000 through one of our structural surveys. This survey enabled us to undertake a refurbishment plan which included wet welding, installation of anodes and pile protection.

Having been the primary diving contractor for Fremantle Ports for the last eight years, Seaforce has been instrumental in marine construction and maintenance through the entire port facilities. Our tasks are many and varied including mooring installation, maintenance and inspection, welding repairs, fender splicing and replacement, non destructive testing (NDT), maintenance and construction of marine structures, anode installation and pile protection.

Corrosion investigation and pile remediation

Sulphate reducing bacteria (SRB) are biological organisms (microbots) that influence corrosion. They can exist in an anaerobic environment and have the potential to cause major loss to steel structures. Seaforce is a leader in the detection and investigation of corrosion on marine structures. After locating SRB we are able to utilize our Ultrasonic thickness tester to determine percentage loss to a steel structure. After compiling a detailed report we are able to recommend preventative measures or make remedial repairs.

Seaforce is able to offer a wide range of protection systems through Denso, utilising environmentally friendly materials to limit the corrosion on steel structures in marine environments. Seaforce has applied protection to thousands of piles for Fremantle Ports through both the inner and outer harbours.

Boat Ramps

The picture below depicts the HM Endeavour just prior to launch. On the 9th December 1993 our dive team assisted in the installation of the launch ramp conforming to the details of the 18th century boat builders. The ramp was installed by Seaforce at cost, to assist the Endeavour Foundation. Other inspection and repairs to boat ramps have included HMAS Stirling located at Garden Island and North Port Boatlifters. These jobs involved the inspection of the entire structure and repairs made through Broco cutting, wet welding and rethreading of bolts.