Activity Report 2016

Dredging Solutions
Dredging Plus Solutions
DEME Fleet


DEME’s subsidiary Tideway has been a specialist in the oil & gas industry for more than 25 years but given the current challenges in this sector, many of the projects in 2016 involved cable laying and rock placement works for the offshore wind industry.


Even though the historically low oil prices have led to a dip in traditional oil & gas activity, Tideway is optimistic that there will be somewhat of a recovery in 2017, though not back to the peaks of previous years. For now offshore wind is the busiest market and the company has already been awarded several key contracts for work in 2017 and 2018.




Offshore wind farms

Here are a few highlights of recent cable laying and rock placement works carried out in the offshore wind market.

For Thorntonbank offshore wind farm in Belgium, Tideway worked on the replacement of an infield power cable. This included preparatory works removing the cable protection and power cable inside the jackets, recovering the defective cable, laying a replacement and burying the new cable.


In the UK, for the DONG Race Bank Offshore Wind Farm, Tideway assisted with the installation of the near shore export cables.


In Germany, the company carried out the postlay cable crossings for DolWin 3 and Veja Mate offshore wind farms. And at Nordsee One, Tideway completed the scour protection for the foundations.


Tideway performed rock dumping works at Godewind I and II and scour protection works were completed at the Galloper offshore wind farm.


In 2017, Tideway will be equally busy in the offshore wind sector with several awards. For Hornsea Project One in the UK, Tideway is responsible for the supply and installation of the power cable system. To optimise the trenching works a customised drag head is being engineered. This will reduce the volume to be removed and backfilled by the TSHD.


In the home market, several DEME subsidiaries – Dredging International, GeoSea and Tideway – will partner with each other at the Rentel offshore wind farm. They will execute the transport and installation of the 42 foundations, as well as the cable installation. Tideway will be responsible for the infield cable installation works, rock placement and erosion protection for the infield and export cables. Rentel is partly owned by DEME Concessions Wind.


This year Tideway will also carry out the infield cable installation works for the Merkur offshore wind farm, north of the islands of Borkum, Germany.

Tideway receives Best Performing Employer 2016 Award

Tideway received the Best Performing Employer 2016 Award in the hydraulic engineering sector in the Netherlands. The nomination committee of the “Nationale Business Succes Award Instituut” thinks that Tideway distinguishes itself because of its recruitment policy and the trust and responsibility it gives employees, which results in low staff turnover and absenteeism. The committee stated that Tideway is an absolute top employer, which shows once again that employees represent the actual capital of the company.

Sofie Verheyde

“When working on the rock installation campaign along the HVDC cables in the Strait of Belle Isle in Labrador – northern Canada, we were faced with many impediments such as harsh weather conditions and treacherous and elusive currents. Not to mention the passing icebergs. Anticipating these circumstances kept us on our toes as we had to provide protection to the HVDC cables for 50 years to come.

At DEME we are determined to challenge the forces of nature and tough project conditions.

We push through with thorough preparation and exceptional teamwork to find solutions for every difficulty encountered.”

Oil & Gas

Meanwhile in the oil & gas market, DEME was awarded a contract for the transport and installation of the P11-E unmanned minimum facility gas platform, and the pre-sweeping and rock placement works were undertaken by Tideway in 2016. The P11-E platform is a natural gas processing offshore facility that will treat the gas feed from the nearby P11-E field on the Dutch continental shelf.


In other challenging projects in 2016, Tideway performed rock placement works on the Lower Churchill Project for the Canadian power company Nalcor. This is for a huge hydropower project in Muskrat Falls, situated in Labrador in an extremely remote location. The company could only work in the spring and summer because of the harsh conditions. Three 30 km power cables were being placed to transport electricity through to Nova Scotia.


Tideway assisted with the execution of a landfall project in the south of Argentina, which was awarded to DEME. For this project, onshore and offshore trenching works were carried out and a 14” gas pipeline was pulled from a pipelaying barge to shore.


In the Strait of Gibraltar, Spain, Tideway successfully completed rock placement work for a pipeline stabilisation project for two major pipelines. This was carried out in spite of the high currents and in water depths of up to 400 m. Here the DP fallpipe vessel ‘Seahorse’ was deployed.

Subsea installation

In 2016 Tideway also set up a subsea division specialising in umbilical installation. This was instrumental in a contract awarded to DEME for the Burullus power plant, which is part of the Siemens Egypt Megaproject. DEME will bring the cool water pipelines from the gasfired power station to the shore. It will do the dredging and trenching with a cutter suction dredger and install the cofferdam.