HMS Alliance Cofferdam Work

Concepts

• portsmouth
• structural products
• nmrn
• hms alliance cofferdam work
• hms alliance
• part of the works
• construction work
• drainage of the cofferdam
• submarine hms alliance
• bow end of the cofferdam

Location

Description

The NMRN are seeking works to the cofferdam which is beneath the submarine HMS Alliance. The cofferdam requires the removal of the stone ballast (and storage) to access to repair the drainage, as well as removal of the walkway at the bow end of the cofferdam. The walkway will require re-installation as part of the works itself after the drainage of the cofferdam has been repaired and the ballast removed reinstated. This is detailed in the Annex's of this document. The work will be carried out at the Royal Navy Submarine Museum, and the work carried out will often be with the museum itself open to the public. However the NMRN understands that some work will require the closure of the site or the submarine for the work to be carried out.

CPV Codes

• 44212000 - Structural products and parts except prefabricated buildings
• 45240000 - Construction work for water projects
• 45262000 - Special trade construction works other than roof works

Other Information

Further communications can be made to Roy Smith Conservation and Maintenance Manager Telephone; 02392 891370 Ext: 2091 ITT Open Procedure for HMS Alliance Cofferdamn Works v2.1 HMS Alliance Cofferdam ITT v2.1.pdf Example of a Service Contract and T&Cs New NMRN Service Contract v3-Example.pdf Annex A- Prepared by Artelia which details the scope of the work required Annex A. Alliance Survey Report and Statement of Requirement.pdf Annex B- Original Drawings for the Concrete Walkway Support Pad Annex B- RNSM Original Concrete walkway support pad details 16676-S-001 Rev A.pdf Annex C- Original Drawings of Cofferdam Walkway and Decking Area Annex C- RNSM Original CofferdamWalkway and decking area as fitted.pdf Annex D- Original Drawings of Access into HMS Alliance and Surrounding Walkway Annex D- RNSM Original Access to HMS Alliance and Walkways.pdf Annex E- Photographs of before the Cofferdam installation in 2010/11 and the construction of it. Including ballast filling. Annex E- Cofferdam Construction Photos.pdf