Project Name:

Dun Laoghaire Harbour - St Michael's pier underwater inspection

Country:

United Kingdom

Client:

Year:

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Project Name:

Country:

United Kingdom

Client:

Mott MacDonald, as consultants to TFE

Year:

2002

Royal Haskoning carried out extensive underwater inspections of the TFE (TotalFinaElf) Oil Re-fuelling Jetty at Milford Haven, Wales. Visual inspections were required on over 400 tubular steel piles, in water depths up to 28 metres.  The survey included ultrasonic thickness readings on 20% of the piles, and reporting on the condition of the associated corrosion protection system.

The jetty is used for the import and export of crude oil and its by-products for TFE’s refinery at Milford Haven. The inspection provided a statement of condition to the client, with maintenance recommendations, which will provide a useful baseline for future monitoring.

The inspection was carried out as a subconsultancy agreement with Mott MacDonald, who undertook the above water surveys of the jetty.

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Project Name:

St Katherine Docks Underwater Condition Survey

Country:

United Kingdom

Client:

Watts & Partners

Year:

Royal Haskoning was commissioned to carry out due diligence surveys of structures inside and around St Katherine Docks in London.

The underwater survey included the historic dock walls, two lock gates and their associated civil works, flooding culverts, a suspended concrete jetty, and a moorng pontoon on the river Thames.

The above water sruvey included numerous bridges, a passenger access gangway and the historic walls above water.

The inspection also considered maintenance and repair costs of this Grade 1 listed site.

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Project Name:

Kamsar Port - Bauxite loading quay underwater pile inspection

Country:

Republic of Guinea

Client:

Compagnie des Bauxite de Guinea

Year:

Inspections on the bauxite loading jetties have been undertaken over the past 16 years and initially was commissioned in March 1993 to establish the condition of piling on a bauxite loading quay, following a major underwater repair contract on the approach jetty. The piles are 2.0m diameter reinforced concrete within a non-structural steel casing. Thirty-one piles were inspected visually/by touch, and by probing using an explosive bolt gun, and pneumatic tools. Additionally during the survey extra works were arranged to undertake ships hull inspection, and inspect accidental berthing damage to one of the quay’s fenders.

Royal Haskoning provided diving engineers, arranged a suitable contractor, prepared contract documents and reported on the results of the inspection. As a non-destructive testing technique the use of explosive bolting is relatively new for works underwater.

The inspection undertaken in April 2002 identified various immediate remedial works were required on the concrete piles and also on the Rio Nunez and Kataba rail bridge piers supplying bauxite from the quarry. The remedial works were undertaken in April 2003 and required Royal Haskoning diving engineers to supervise the six week contract. Further inspection were carried out in March 2005.

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Project Name:

Country:

United Kingdom

Client:

Year:

Royal Haskoning carried out a professional appraisal of the maritime structures at a Royal Marines base in Plymouth.

A diving engineer surveyed the structures both above and below the water. These included floating pontoons, two suspended jetties, a slipway, screening grid and an extensive masonry sea wall around the facility.

As part of the report, recommendations for maintenance, future monitoring and estimates of repair costs were made for a five-year period.

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