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Displaying items by tag: Dredging

The Dublin Port Company has given notice that maintenance dredging will take place between Alexandra Basin and the Dublin Bay Buoy from tomorrow, Thursday 10 September.

Four weeks of dredging works are scheduled in the fairway and berth pockets from the buoy to a line drawn due south of berth OB1 and including Alexandra Basin East.

Three vessels will be involved in the dredging works: the trailing suction hopper dredger Shoalway; the survey vessel Smit Neyland; and Norma, a bed-levelling plough.

The three craft will maintain a listening watch on VHF Channel 12 and show the required lights and shapes.

All other vessels should pass at slow speed and make due allowance for their operations and restricted manoeuvrability.

Published in Dublin Port
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The Port of Cork reminds mariners that maintenance dredging will be taking place in Cork Harbour on all main shipping channels and berths from this Wednesday 19 August.

As previously reported on Afloat.ie, the dredging campaign by the TSHD Taccola will progress 24 hours a day until late September.

It follows a prior survey conducted last week, and bed levelling operations which began yesterday, Sunday 16 August.

Mariners are requested to navigate with caution when in the vicinity of the work craft, to pass by as wide a margin as possible and proceed with minimum wash and speed.

Published in Port of Cork
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A maintenance dredging campaign has begun in recent days at the Port of Waterford where activities will involve the waters of Duncannon Bar, Cheekpoint, and at the port's main terminal at Belview, writes Jehan Ashmore

Prior to the operations at the south-east port, the Cypriot flagged Shoalway, a trailing suction hopper dredger had been carrying out operations for the Dublin Port Company. Shoalway sailed from the capital to arrive on the Waterford Estuary on Sunday. 

According to the Port of Waterford (click to consult campaign notice here), the dredger will dispose spoil at an approved site south west of Hook Head, Co. Wexford. Dredging will be followed by a bed levelling campaign by the vessels, Fastnet Sound and or the Glenesk.

Afloat adds that Irish Dredging which is a subsidiary of Royal Boskalis Westminster nv, the world’s largest dredging group, was given the contract from the Port of Waterford. The extensive fleet of the Dutch group provides Irish Dredging access to the use a of wide range of vessels for projects around the Irish coast.

Further tracking of the Shoalway since introduction on the Waterford Estaury has seen the 90m long dredger kept busy between Cheekpoint to the spoiling grounds out to sea.

The campaign according to the Port of Waterford is expected to last approximately 24 days.

Published in Irish Ports

#Irishports - The Port of Waterford have issued a Marine Notice in recent days to advise all ship owners, shipmasters, agents, fishing vessels, pleasure craft users, seafarers and fishery organisations of a dredging campaign, writes Jehan Ashmore.

The dredging operation along Waterford Estuary began in mid-March and according to the south-east multi-modal Port the campaign will continue until around 6 April.

Carrying out these works is the task of trailing suction hopper dredger Freeway which will conduct dredging activities in the vicinity of Belview Port. The lo-lo facility located downriver of Waterford City is the main port along the estuary.

Freeway is operated by UK firm, Royal Boskalis Westminster based in Hampshire. They are no strangers to these waters having been contracted previously by the port and more recently from the Dublin Port Company. Due to berth capacity constraints the 92m dredger during December had to dock in Dun Laoghaire Harbour.

On this occasion, Freeway's role on Waterford Estuary will include duties carried off Cheekpoint and at the Duncannon Bar located further downriver and beyond where the Passage East ferry links to Ballyhack.

Disposal material from Freeway will take place at an approved site south west of Hook Head. Following such work a bed-levelling campaign will be assigned to the Waterford City based catamaran craft Fastnet Sound.

Published in Irish Ports

The Department of Agriculture, Food and the Marine has updated local Fingal councillors on its proposals for the dredging of Howth Harbour.

On his Facebook page, Cllr Cian O’Callaghan says the meeting with the department and the Howth Harbour Master on Wednesday (6 March) detailed a plan to dredge five key areas of the harbour, namely:

  • The fishing trawler basin between the West Pier and Middle Pier
  • The approach channel at the mouth of the harbour
  • The marina used by Howth Yacht Club
  • The approach channel to the marina
  • The outer moorings area which is used by the Howth Sailing and Boat Club

This would result in the extraction of 225,000 cubic metres of silt, the equivalent of up to 30,000 lorry loads, says Cllr O’Callaghan.

The detailed plan follows testing of material extracted from the harbour which confirms that while is it contaminated by general harbour activity, it is not considered hazardous.

It is being proposed that the spoil be treated and used to create a 100-metre-wide infill area along the west side of the present West Pier. Plans for the use of this new space have not yet been decided but it is expected there will be a relevant public consultation by year’s end.

Four months ago the tender period closed for engineering services related to these long-awaited dreading works in the North Co Dublin harbour.

Published in Howth YC
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Monday 12 November is the final date for receipt of tenders for engineering services for the long-awaited dredging of Howth Harbour.

Howth Yacht Club Commodore Joe McPeake has confirmed the date after contact with the Department of Transport, Tourism and Sport.

It is believed that consultants will be appointed within two weeks of tender closing date, and that they will engage with harbour stakeholders early in the new year to discuss issues such as minimising disruption to harbour operations, including the moorings and marina.

While no clear timeframe is available as yet, Commodore McPeake expects the initial stage towards securing licensing and planning permission to take 12 to 15 months, pending any potential challenges.

Following that, dredging works could take up to 18 months to complete, including works at both piers in Howth.

“As soon as the engineers have been appointed we will seek to meet with them to scope out their plan to methodology and review its implications for us,” said Commodore McPeake, who expects to further update Howth Yacht Club members in February.

Published in Howth YC
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#Ports&Shipping - The second largest port in Northern Ireland, Warrenpoint Port, is inviting members of the public and other key stakeholders to comment on proposed changes to how dredged material from the harbour is dealt with.

The Co. Down port currently carries out a major dredging programme every two to five years with material disposed of in the Irish Sea.

However, new plans have been put forward to carry out dredging on a more regular but smaller scale, with material placed at a site in the mouth of Carlingford Lough between Cranfield Point and Greencastle.

Clare Guinness, CEO, Warrenpoint Port said: “In order for the Port to continue to support maritime trade successfully, it must ensure a sufficient water depth is maintained to allow for the safe berthing of vessels, which it does through dredging.

“In anticipation of a rise in trade over the coming years, and to ensure the Port continues to thrive as an economic driver to the local region, a new site for the disposal of dredged material is being proposed within the mouth of Carlingford Lough.

“This is also in line with current thinking that dredged material should be deposited as close as possible to source.

“In our role as a custodian of the marine environment, we want to hear the views of all stakeholders, including members of the public, before any plans are put into action.”

A number of surveys, studies and assessments will be undertaken to determine the suitability of the location between Cranfield Point and Greencastle, including marine ecology and sediment surveys, geophysical surveys, and hydrodynamic and sediment transport modelling.

A public drop-in consultation event will take place at Warrenpoint Town Hall on Wednesday 19th September from 4pm to 7pm. There will be an opportunity to discuss the proposed disposal site and the environmental assessment process with Port staff and its consultants Royal HaskoningDHV.

Published in Ports & Shipping

#DublinBay - The dumping of sewage sludge in deeper waters beyond the Kish Bank “might well serve as a model” for the current dredging of Dublin Port.

In a letter to The Irish Times earlier this week, Cormac F Lowth, a diver and member of the Maritime Institute of Ireland, responds to the claims of Dublin Port Company’s chief regarding the effects of recent dredging operations.

Dublin Port CEO Eamonn O’Reilly defended the dredging operations in the port, citing “the science available to measure its impact” in response to discontent among diving groups over the state of the water in Dublin Bay.

Divers concerned that the dredging is to blame for murky waters, which have seen all planned dives cancelled due to poor visibility, have however “ignored the obvious” and might now look further east for a potential answer to a question that’s left the bay’s crabs and lobsters with ‘an overcoat of silt on their backs’.

Lowth explains that dredging spoil such as that dumped at the Burford Bank at the edge of Dublin Bay contains estuarine mud and fluvial silt that “is not going to remain in toto on the top of this bank”.

“A glance at a tidal atlas for Dublin Bay is enough to convince one that much of anything that gets dumped near the mouth of the bay will get washed back in by the strong tidal currents,” writes Lowth. “This can surely be described as the maritime equivalent of defecating on your own doorstep.”

The Irish Times has more on the story HERE.

This article was updated on Thursday 17 May to correct an inadvertent misrepresentation of Cormac F Lowth's comments.

Published in Dublin Bay
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#DublinBay - Murky seawater in Dublin Bay should not be blamed on dredging, according to Dublin Port Company’s CEO.

Earlier this week, it emerged that all planned diving excursions in Dublin Bay by Irish Underwater Council members had been cancelled due to poor visibility in the water.

Dive instructor Peader Farrell pointed at dredging works to deepen the channels into Dublin Port for rendering the bay’s waters “filthy brown” and leaving crustaceans “with an overcoat of silt on their backs”.

However, in a letter to The Irish times this morning (Thursday 10 May), Dublin Port Company chief executive Eamonn O’Reilly says that the dredging operations that began last year ‘did not cause any discernible increase in turbidity above recorded background levels’, according to the port’s Annual Environmental Report.

“Dredging has been a feature of operations in Dublin Port since the early 20th century,” said O’Reilly.

“We now have the science available to measure its impact and objectively confirm that dredging in Dublin Port does not damage the environment of Dublin Bay.”

The Irish Times has more HERE.

Published in Dublin Bay
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#DublinBay - All planned diving expeditions in Dublin Bay have been cancelled due to silt from dredging operations clouding the water, it has been claimed.

The Irish Times reports that Irish Underwater Council members have abandoned all scheduled dives, as a result of poor visibility from particles in the water that have also left lobsters and crabs with “an overcoat of silt on their backs”, according to one diver.

Dredging works to allow larger cargo ships and cruise liners to enter Dublin Port began in October last year, as previously reported on Afloat.ie.

But this dredging has left the waters of Dublin Bay “filthy brown, somewhere between dark chocolate and milk chocolate,” says diving instructor Peadar Farrell. “None of the local scuba diving clubs have been able to start diving as yet in 2018.”

The Irish Times has more on the story HERE.

Published in Dublin Bay
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Page 1 of 3

The Half Ton Class was created by the Offshore Racing Council for boats within the racing band not exceeding 22'-0". The ORC decided that the rule should "....permit the development of seaworthy offshore racing yachts...The Council will endeavour to protect the majority of the existing IOR fleet from rapid obsolescence caused by ....developments which produce increased performance without corresponding changes in ratings..."

When first introduced the IOR rule was perfectly adequate for rating boats in existence at that time. However yacht designers naturally examined the rule to seize upon any advantage they could find, the most noticeable of which has been a reduction in displacement and a return to fractional rigs.

After 1993, when the IOR Mk.III rule reached it termination due to lack of people building new boats, the rule was replaced by the CHS (Channel) Handicap system which in turn developed into the IRC system now used.

The IRC handicap system operates by a secret formula which tries to develop boats which are 'Cruising type' of relatively heavy boats with good internal accommodation. It tends to penalise boats with excessive stability or excessive sail area.

Competitions

The most significant events for the Half Ton Class has been the annual Half Ton Cup which was sailed under the IOR rules until 1993. More recently this has been replaced with the Half Ton Classics Cup. The venue of the event moved from continent to continent with over-representation on French or British ports. In later years the event is held biennially. Initially, it was proposed to hold events in Ireland, Britain and France by rotation. However, it was the Belgians who took the ball and ran with it. The Class is now managed from Belgium. 

At A Glance – Half Ton Classics Cup Winners

  • 2017 – Kinsale – Swuzzlebubble – Phil Plumtree – Farr 1977
  • 2016 – Falmouth – Swuzzlebubble – Greg Peck – Farr 1977
  • 2015 – Nieuwport – Checkmate XV – David Cullen – Humphreys 1985
  • 2014 – St Quay Portrieux – Swuzzlebubble – Peter Morton – Farr 1977
  • 2013 – Boulogne – Checkmate XV – Nigel Biggs – Humphreys 1985
  • 2011 – Cowes – Chimp – Michael Kershaw – Berret 1978
  • 2009 – Nieuwpoort – Général Tapioca – Philippe Pilate – Berret 1978
  • 2007 – Dun Laoghaire – Henri-Lloyd Harmony – Nigel Biggs – Humphreys 1980~
  • 2005 – Dinard – Gingko – Patrick Lobrichon – Mauric 1968
  • 2003 – Nieuwpoort – Général Tapioca – Philippe Pilate – Berret 1978

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