A nominally 28 metre wide by 600 metre long reinforced concrete jetty on steel tubular piles for Royal Naval Vessels up to aircraft carrier of 55,000 tonnes.

Adjacent to the historic area of the Basin 1 complex at HMNB Portsmouth, the works impinged upon Ancient Monuments. Historic environs of National and International importance containing HMS Victory and the Mary Rose together with the Block Mills Building (first mass production factory set up by Brunel) and the first stone “alter step” dry dock in the world (1690). Castria advised on design and interface with the Scheduled Ancient Monuments comprising sea walls and dry docks, but also the historic structures within the setting of the project.

Coordination with English Heritage, Government, Local and County Authorities were necessary and option studies presented at various stages. A detailed photographic condition survey was made and installed on a computerised database. Precise monitoring of all historic sea walls and dock side structures, including below ground culverts and penstocks was undertaken with 3D geosensors at some 42 locations, with data storage for PC analysis. An alarm was linked to give early warning of possible damage during piling operations.

To obtain clearance a Needs Statement was required for presentation, which included detailed graphical modelling of final proposals.


    Portsmouth | Hampshire


    Scheduled Ancient Monument
    Condition Survey
    Design Statement
    Environmental Impact Assessment
    Planning Application
    Risk Assessment.