Construction of Cowes’ New Breakwater Progresses Well (UK)

Work on the construction of a new breakwater structure at the mouth of Cowes Harbour, which will transform the port into a true sheltered harbourage, has successfully moved into the third stage of this vital 18-month coastal protection project.

Cowes Harbour Commission’s appointed contractors Boskalis Westminster, world leaders in the design and construction of breakwaters, have completed the installation of an initial 1.5 metre layer of sand and gravel along the breakwater footprint (350m x 50m) and inserted a total of 11,000 wick drains to draw out water, thereby improving the ground bearing capacity of the seabed.

Capt. Stuart McIntosh, Harbour Master at Cowes, said: “Construction on Cowes’ new detached breakwater is progressing extremely well and we have now commenced stage three of the 2014 works program which is the placing of a geotextile membrane on top of the sand and gravel layer. This phase of the operation, carried out during daylight hours by a large barge and multi-cat, will run up to the start of August and Aberdeen Asset Management Cowes Week as planned.”

The Exclusion Zone that is in place around the submerged breakwater and construction area will remain in place during the Cowes Week regatta; all harbour users and competitors are strongly advised to take careful note of the Cowes Local Notices to Mariners for the most up-to-date information on the extent and shape of the Exclusion Zone, which is shown by lit buoys and cardinal marks.

A 300 metre long floating orange and black pipeline, also lit, is anchored parallel to the breakwater on its northern side, and a 60 metre barge may be positioned anywhere along the breakwater footprint. For their safety, all vessels must ensure they stay outside of this Exclusion Zone and enter or depart Cowes Harbour via the fairway or Small Craft Channel.

Following a recent agreement between Cowes Harbour Commission and Boskalis Westminster, the fourth stage of construction on the breakwater is now set to start after Aberdeen Asset Management Cowes Week and will see the installation of the breakwater’s gravel core up to between 4 and 5 metres above chart datum using a trailing suction hopper dredger, floating pipeline and spraying pontoon.

When the crest of the breakwater is visible above the water surface, the spraying pontoon will then be utilised to spray gravel against the slopes of the breakwater. The gravel will be left to consolidate for one month prior to being raised up to 5 metres above chart datum along the whole length of the breakwater.

By this September, and during a nine month period over the autumn and winter to allow for settlement of the gravel core, the breakwater will resemble a gravel spit and will only begin to take its final finished appearance during the 2015 works.

Press Release, July 24, 2014

Share this article

Follow Dredging Today

Posted on July 24, 2014 with tags , .

Events>

<< Aug 2019 >>
MTWTFSS
29 30 31 1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31 1

Eastern Chapter WEDA Fall 2019 Conference

Wednesday (10/16/19) afternoon will start the program with an opportunity to take the Dredging 101 course.

read more >

10TH Annual Conference Dredging in India

The conference will focus on strategies and solutions to meet the future dredging requirements…

read more >

Australasian Coasts and Ports 2019

Conference Theme “Future directions from 40°S and beyond” reflects the increasing awareness about the need to find suitable…

read more >

PORTS Conference

The PORTS Conference series is internationally recognized as an outstanding opportunity to network with…

read more >

Jobs>

Dredging jobs in Abu Dhabi at NMDC

National Marine Dredging Company “NMDC” aims to be the largest dredging player in the Arab’s Gulf region...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below....

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply