Seatech were asked to tender for repair of a sheet piled river wall in Barking, East London as part of the consent process for the construction of a new affordable housing scheme. The repair of the original sheet piling was clearly prescribed in the tender documents – welding stiffener plates to inpans and any outpans which had corroded to less than 5mm thickness.
Seatech arranged to undertake a preliminary survey of the wall including Ultrasonic thickness measurements on the existing steel sheet piles. It was found that the piles were too thin to weld to so Seatech designed and installed a reinforced concrete facing to the sheet piles to protect from further corrosion issues and add structural integrity to the wall.
The sheet piles were cleaned with a high pressure water jet to remove loose material and corrosion product, welded on over 300 shear bars, fixed reinforcement and bespoke Peri formwork and pumped high strength concrete with underwater admixtures to form a 300mm thick reinforced facing to the wall.
Seatech got the call at 2.00am on Sunday 4th January 2015 to help in the refloating of the car carrier Hoegh Osaka. More than 1,400 Land Rovers, Minis and Jaguars were being transported through the Solent when the vessel was run aground on Bramble Bank on 3 January 2015.
Seatech were contracted to work with Svitzer Salvage supplying diver assistance, rope access teams, support vessels and fabricators.
The work to right the vessel took a total of 19 days when she was finally towed into Southampton Port to off load the cargo and undertake inspections.
A 30 man strong team from Seatech exhausted 537000 minutes of underwater burning to successfully remove the stricken vessel from the seabed in Alexandria Egypt. Working 24/7 the vessel was strategically cut into pieces, this proved difficult at times due to the vessel sustaining severe damage and in some sections all of the decks had compressed.
The Costa Concordia ran aground off the coast of Italy with over 4,000 passengers and crew on board on 13th January 2012. The vessel was partially submerged sitting dangerously on an edge, where it drops off to a depth of 290 feet. Seatech supplied dive teams around the clock to help secure the huge metal pulling cables to the caissons on the side of the ship which would help right the Costa Concordia after a 19 hour procedure.
The dive teams worked on various operations including Underwater Welding, cutting and surveying.
The Costa Concordia is now at Genoa Port where work will soon begin to dismantle the 114,000-ton cruise liner, stripping the ship of its scrap metal and recyclable materials. This marks the completion of the largest maritime salvage jobs in history.
Seatech are proud to be associated with numerous salvage and recovery projects across the world including being the Principle Contractor and Diving Contractor for the raising of the WWII Dornier 17 Bomber at Goodwin Sands off the Kent coast. It took three years of planning and was lying on a chalk bed surrounded by debris at a depth of 50ft. Our in-house engineers and fabricator designed and constructed an aluminium and steel box frame to lift the WWII aircraft from the sea bed in a single lift on 10 June 2013.
Experts believe the plane is the last remaining Dornier bomber in existence. The project is believed to be the biggest recovery of its kind in British waters.
The Dornier 17 is now sited at the RAF Museum Cosford.
Seatech were approached by CB"l UK Limited to find a solution to remove one thousand seven hundred and three items (1703) of construction debris from the seabed at South Hook LNG Terminal Milford Haven, South West Wales.
Items included scaffold poles, steel ladders, various diameter pipework, re-bar, safety walkway platform grills, cable and pile off cuts.
The debris was discovered from a previous survey of the seabed carried out in the summer of 2010. The works were broken up into 83 separate working areas and individually reported on.
Cages were lowered onto the seabed and loaded by the dive teams which were then craned aboard a barge where each item was individually sorted, logged, photographed and finally disposed of via skips.
Seatech divers were deployed to Richards Bay in South Africa in Late January 2014 to help with the salvage of the 151,279 DWT bulk carrier MV Smart.
The vessel ran aground on August 19th 2013 as she was departing the Port of Richards Bay laden with 147,650 tons of coal.
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Seatech Commercial Diving Services Ltd
Unit 14, Bottings Ind. Estate
Hampshire. SO30 2DY
Tel: +44 (0)1489 797 969
(includes 24/7 emergency line).