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New jetty float test a success for Morgan Est and AMEC

A new £150 million submarine jetty constructed for the Ministry of Defence (MoD) by Morgan Est and joint venture partner AMEC has been successfully floated ahead of its launch.

The jetty, which has a 50-year design life and has taken five years to build, was floated at Inchgreen Dry Dock facility, at Greenock, in Scotland over the Easter bank holiday weekend. Construction and design teams worked for three days to flood the dock to float level.

The joint venture project, procured for the MoD by Defence Estates with industry support from Jacobs, has been designed to provide a modern, cost-effective and nuclear safety justified berthing facility to support Astute class submarines and all other Royal Navy nuclear fleet submarines.

Andy Woodward, Joint Venture Project Director, said: “We started filling the dry dock up on Thursday with about two inches of water an hour.

“By Saturday we had 3mm of movement in the middle of the jetty and it is huge credit to the civil design team as it floated exactly as the design was forecast.

“It has been successfully floating now for nearly four weeks and all appears to be well.”

The jetty is 220 metres long, 28 metres wide, 10.8 metres deep and weighs 42,000 tonnes.

This was the last stage of the jetty testing process prior to its forthcoming float-out at Faslane HMNB in Clyde.

Faslane HMNB supports all of the Royal Navy’s submarine fleet, small surface ships and the occasional larger vessel.

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